Merge branch 'master' of https://github.com/MoonchildProductions/UXP into js_array_values_1

59 files changed, 4304 insertions, 101 deletions

diff --git a/js/src/tests/Intl/Collator/construct-newtarget.js b/js/src/tests/Intl/Collator/construct-newtarget.js
new file mode 100644
index 0000000000..5db1abf373
--- /dev/null
+++ b/js/src/tests/Intl/Collator/construct-newtarget.js
@@ -0,0 +1,81 @@
+// |reftest| skip-if(!this.hasOwnProperty("Intl"))
+
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+
+// Test subclassing %Intl.Collator% works correctly.
+class MyCollator extends Intl.Collator {}
+
+var obj = new MyCollator();
+assertEq(obj instanceof MyCollator, true);
+assertEq(obj instanceof Intl.Collator, true);
+assertEq(Object.getPrototypeOf(obj), MyCollator.prototype);
+
+obj = Reflect.construct(MyCollator, []);
+assertEq(obj instanceof MyCollator, true);
+assertEq(obj instanceof Intl.Collator, true);
+assertEq(Object.getPrototypeOf(obj), MyCollator.prototype);
+
+obj = Reflect.construct(MyCollator, [], MyCollator);
+assertEq(obj instanceof MyCollator, true);
+assertEq(obj instanceof Intl.Collator, true);
+assertEq(Object.getPrototypeOf(obj), MyCollator.prototype);
+
+obj = Reflect.construct(MyCollator, [], Intl.Collator);
+assertEq(obj instanceof MyCollator, false);
+assertEq(obj instanceof Intl.Collator, true);
+assertEq(Object.getPrototypeOf(obj), Intl.Collator.prototype);
+
+
+// Set a different constructor as NewTarget.
+obj = Reflect.construct(MyCollator, [], Array);
+assertEq(obj instanceof MyCollator, false);
+assertEq(obj instanceof Intl.Collator, false);
+assertEq(obj instanceof Array, true);
+assertEq(Object.getPrototypeOf(obj), Array.prototype);
+
+obj = Reflect.construct(Intl.Collator, [], Array);
+assertEq(obj instanceof Intl.Collator, false);
+assertEq(obj instanceof Array, true);
+assertEq(Object.getPrototypeOf(obj), Array.prototype);
+
+
+// The prototype defaults to %CollatorPrototype% if null.
+function NewTargetNullPrototype() {}
+NewTargetNullPrototype.prototype = null;
+
+obj = Reflect.construct(Intl.Collator, [], NewTargetNullPrototype);
+assertEq(obj instanceof Intl.Collator, true);
+assertEq(Object.getPrototypeOf(obj), Intl.Collator.prototype);
+
+obj = Reflect.construct(MyCollator, [], NewTargetNullPrototype);
+assertEq(obj instanceof MyCollator, false);
+assertEq(obj instanceof Intl.Collator, true);
+assertEq(Object.getPrototypeOf(obj), Intl.Collator.prototype);
+
+
+// "prototype" property is retrieved exactly once.
+var trapLog = [], getLog = [];
+var ProxiedConstructor = new Proxy(Intl.Collator, new Proxy({
+    get(target, propertyKey, receiver) {
+        getLog.push(propertyKey);
+        return Reflect.get(target, propertyKey, receiver);
+    }
+}, {
+    get(target, propertyKey, receiver) {
+        trapLog.push(propertyKey);
+        return Reflect.get(target, propertyKey, receiver);
+    }
+}));
+
+obj = Reflect.construct(Intl.Collator, [], ProxiedConstructor);
+assertEqArray(trapLog, ["get"]);
+assertEqArray(getLog, ["prototype"]);
+assertEq(obj instanceof Intl.Collator, true);
+assertEq(Object.getPrototypeOf(obj), Intl.Collator.prototype);
+
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0);
diff --git a/js/src/tests/Intl/DateTimeFormat/construct-newtarget.js b/js/src/tests/Intl/DateTimeFormat/construct-newtarget.js
new file mode 100644
index 0000000000..bbc08c79a1
--- /dev/null
+++ b/js/src/tests/Intl/DateTimeFormat/construct-newtarget.js
@@ -0,0 +1,81 @@
+// |reftest| skip-if(!this.hasOwnProperty("Intl"))
+
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+
+// Test subclassing %Intl.DateTimeFormat% works correctly.
+class MyDateTimeFormat extends Intl.DateTimeFormat {}
+
+var obj = new MyDateTimeFormat();
+assertEq(obj instanceof MyDateTimeFormat, true);
+assertEq(obj instanceof Intl.DateTimeFormat, true);
+assertEq(Object.getPrototypeOf(obj), MyDateTimeFormat.prototype);
+
+obj = Reflect.construct(MyDateTimeFormat, []);
+assertEq(obj instanceof MyDateTimeFormat, true);
+assertEq(obj instanceof Intl.DateTimeFormat, true);
+assertEq(Object.getPrototypeOf(obj), MyDateTimeFormat.prototype);
+
+obj = Reflect.construct(MyDateTimeFormat, [], MyDateTimeFormat);
+assertEq(obj instanceof MyDateTimeFormat, true);
+assertEq(obj instanceof Intl.DateTimeFormat, true);
+assertEq(Object.getPrototypeOf(obj), MyDateTimeFormat.prototype);
+
+obj = Reflect.construct(MyDateTimeFormat, [], Intl.DateTimeFormat);
+assertEq(obj instanceof MyDateTimeFormat, false);
+assertEq(obj instanceof Intl.DateTimeFormat, true);
+assertEq(Object.getPrototypeOf(obj), Intl.DateTimeFormat.prototype);
+
+
+// Set a different constructor as NewTarget.
+obj = Reflect.construct(MyDateTimeFormat, [], Array);
+assertEq(obj instanceof MyDateTimeFormat, false);
+assertEq(obj instanceof Intl.DateTimeFormat, false);
+assertEq(obj instanceof Array, true);
+assertEq(Object.getPrototypeOf(obj), Array.prototype);
+
+obj = Reflect.construct(Intl.DateTimeFormat, [], Array);
+assertEq(obj instanceof Intl.DateTimeFormat, false);
+assertEq(obj instanceof Array, true);
+assertEq(Object.getPrototypeOf(obj), Array.prototype);
+
+
+// The prototype defaults to %DateTimeFormatPrototype% if null.
+function NewTargetNullPrototype() {}
+NewTargetNullPrototype.prototype = null;
+
+obj = Reflect.construct(Intl.DateTimeFormat, [], NewTargetNullPrototype);
+assertEq(obj instanceof Intl.DateTimeFormat, true);
+assertEq(Object.getPrototypeOf(obj), Intl.DateTimeFormat.prototype);
+
+obj = Reflect.construct(MyDateTimeFormat, [], NewTargetNullPrototype);
+assertEq(obj instanceof MyDateTimeFormat, false);
+assertEq(obj instanceof Intl.DateTimeFormat, true);
+assertEq(Object.getPrototypeOf(obj), Intl.DateTimeFormat.prototype);
+
+
+// "prototype" property is retrieved exactly once.
+var trapLog = [], getLog = [];
+var ProxiedConstructor = new Proxy(Intl.DateTimeFormat, new Proxy({
+    get(target, propertyKey, receiver) {
+        getLog.push(propertyKey);
+        return Reflect.get(target, propertyKey, receiver);
+    }
+}, {
+    get(target, propertyKey, receiver) {
+        trapLog.push(propertyKey);
+        return Reflect.get(target, propertyKey, receiver);
+    }
+}));
+
+obj = Reflect.construct(Intl.DateTimeFormat, [], ProxiedConstructor);
+assertEqArray(trapLog, ["get"]);
+assertEqArray(getLog, ["prototype"]);
+assertEq(obj instanceof Intl.DateTimeFormat, true);
+assertEq(Object.getPrototypeOf(obj), Intl.DateTimeFormat.prototype);
+
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0);
diff --git a/js/src/tests/Intl/DateTimeFormat/timeZone_backward_links.js b/js/src/tests/Intl/DateTimeFormat/timeZone_backward_links.js
index aeb1fc0431..890b1c1d54 100644
--- a/js/src/tests/Intl/DateTimeFormat/timeZone_backward_links.js
+++ b/js/src/tests/Intl/DateTimeFormat/timeZone_backward_links.js
@@ -1,7 +1,7 @@
 // |reftest| skip-if(!this.hasOwnProperty("Intl"))
 
 // Generated by make_intl_data.py. DO NOT EDIT.
-// tzdata version = 2017c
+// tzdata version = 2018c
 
 const tzMapper = [
     x => x,
diff --git a/js/src/tests/Intl/DateTimeFormat/timeZone_backzone.js b/js/src/tests/Intl/DateTimeFormat/timeZone_backzone.js
index b9d957a829..19fd871eb1 100644
--- a/js/src/tests/Intl/DateTimeFormat/timeZone_backzone.js
+++ b/js/src/tests/Intl/DateTimeFormat/timeZone_backzone.js
@@ -1,7 +1,7 @@
 // |reftest| skip-if(!this.hasOwnProperty("Intl"))
 
 // Generated by make_intl_data.py. DO NOT EDIT.
-// tzdata version = 2017c
+// tzdata version = 2018c
 
 const tzMapper = [
     x => x,
@@ -47,7 +47,6 @@ const links = {
     "Africa/Nouakchott": "Africa/Nouakchott",
     "Africa/Ouagadougou": "Africa/Ouagadougou",
     "Africa/Porto-Novo": "Africa/Porto-Novo",
-    "Africa/Sao_Tome": "Africa/Sao_Tome",
     "Africa/Timbuktu": "Africa/Timbuktu",
     "America/Anguilla": "America/Anguilla",
     "America/Antigua": "America/Antigua",
diff --git a/js/src/tests/Intl/DateTimeFormat/timeZone_backzone_links.js b/js/src/tests/Intl/DateTimeFormat/timeZone_backzone_links.js
index 7a358e9975..34425acec8 100644
--- a/js/src/tests/Intl/DateTimeFormat/timeZone_backzone_links.js
+++ b/js/src/tests/Intl/DateTimeFormat/timeZone_backzone_links.js
@@ -1,7 +1,7 @@
 // |reftest| skip-if(!this.hasOwnProperty("Intl"))
 
 // Generated by make_intl_data.py. DO NOT EDIT.
-// tzdata version = 2017c
+// tzdata version = 2018c
 
 const tzMapper = [
     x => x,
diff --git a/js/src/tests/Intl/DateTimeFormat/timeZone_notbackward_links.js b/js/src/tests/Intl/DateTimeFormat/timeZone_notbackward_links.js
index 9515cb3945..8b2dedec2d 100644
--- a/js/src/tests/Intl/DateTimeFormat/timeZone_notbackward_links.js
+++ b/js/src/tests/Intl/DateTimeFormat/timeZone_notbackward_links.js
@@ -1,7 +1,7 @@
 // |reftest| skip-if(!this.hasOwnProperty("Intl"))
 
 // Generated by make_intl_data.py. DO NOT EDIT.
-// tzdata version = 2017c
+// tzdata version = 2018c
 
 const tzMapper = [
     x => x,
diff --git a/js/src/tests/Intl/NumberFormat/construct-newtarget.js b/js/src/tests/Intl/NumberFormat/construct-newtarget.js
new file mode 100644
index 0000000000..0053b2737e
--- /dev/null
+++ b/js/src/tests/Intl/NumberFormat/construct-newtarget.js
@@ -0,0 +1,81 @@
+// |reftest| skip-if(!this.hasOwnProperty("Intl"))
+
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+
+// Test subclassing %Intl.NumberFormat% works correctly.
+class MyNumberFormat extends Intl.NumberFormat {}
+
+var obj = new MyNumberFormat();
+assertEq(obj instanceof MyNumberFormat, true);
+assertEq(obj instanceof Intl.NumberFormat, true);
+assertEq(Object.getPrototypeOf(obj), MyNumberFormat.prototype);
+
+obj = Reflect.construct(MyNumberFormat, []);
+assertEq(obj instanceof MyNumberFormat, true);
+assertEq(obj instanceof Intl.NumberFormat, true);
+assertEq(Object.getPrototypeOf(obj), MyNumberFormat.prototype);
+
+obj = Reflect.construct(MyNumberFormat, [], MyNumberFormat);
+assertEq(obj instanceof MyNumberFormat, true);
+assertEq(obj instanceof Intl.NumberFormat, true);
+assertEq(Object.getPrototypeOf(obj), MyNumberFormat.prototype);
+
+obj = Reflect.construct(MyNumberFormat, [], Intl.NumberFormat);
+assertEq(obj instanceof MyNumberFormat, false);
+assertEq(obj instanceof Intl.NumberFormat, true);
+assertEq(Object.getPrototypeOf(obj), Intl.NumberFormat.prototype);
+
+
+// Set a different constructor as NewTarget.
+obj = Reflect.construct(MyNumberFormat, [], Array);
+assertEq(obj instanceof MyNumberFormat, false);
+assertEq(obj instanceof Intl.NumberFormat, false);
+assertEq(obj instanceof Array, true);
+assertEq(Object.getPrototypeOf(obj), Array.prototype);
+
+obj = Reflect.construct(Intl.NumberFormat, [], Array);
+assertEq(obj instanceof Intl.NumberFormat, false);
+assertEq(obj instanceof Array, true);
+assertEq(Object.getPrototypeOf(obj), Array.prototype);
+
+
+// The prototype defaults to %NumberFormatPrototype% if null.
+function NewTargetNullPrototype() {}
+NewTargetNullPrototype.prototype = null;
+
+obj = Reflect.construct(Intl.NumberFormat, [], NewTargetNullPrototype);
+assertEq(obj instanceof Intl.NumberFormat, true);
+assertEq(Object.getPrototypeOf(obj), Intl.NumberFormat.prototype);
+
+obj = Reflect.construct(MyNumberFormat, [], NewTargetNullPrototype);
+assertEq(obj instanceof MyNumberFormat, false);
+assertEq(obj instanceof Intl.NumberFormat, true);
+assertEq(Object.getPrototypeOf(obj), Intl.NumberFormat.prototype);
+
+
+// "prototype" property is retrieved exactly once.
+var trapLog = [], getLog = [];
+var ProxiedConstructor = new Proxy(Intl.NumberFormat, new Proxy({
+    get(target, propertyKey, receiver) {
+        getLog.push(propertyKey);
+        return Reflect.get(target, propertyKey, receiver);
+    }
+}, {
+    get(target, propertyKey, receiver) {
+        trapLog.push(propertyKey);
+        return Reflect.get(target, propertyKey, receiver);
+    }
+}));
+
+obj = Reflect.construct(Intl.NumberFormat, [], ProxiedConstructor);
+assertEqArray(trapLog, ["get"]);
+assertEqArray(getLog, ["prototype"]);
+assertEq(obj instanceof Intl.NumberFormat, true);
+assertEq(Object.getPrototypeOf(obj), Intl.NumberFormat.prototype);
+
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0);
diff --git a/js/src/tests/ecma_2017/AsyncFunctions/construct-newtarget.js b/js/src/tests/ecma_2017/AsyncFunctions/construct-newtarget.js
new file mode 100644
index 0000000000..7d75d0c939
--- /dev/null
+++ b/js/src/tests/ecma_2017/AsyncFunctions/construct-newtarget.js
@@ -0,0 +1,79 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+const AsyncFunction = async function(){}.constructor;
+
+
+// Test subclassing %AsyncFunction% works correctly.
+class MyAsync extends AsyncFunction {}
+
+var fn = new MyAsync();
+assertEq(fn instanceof MyAsync, true);
+assertEq(fn instanceof AsyncFunction, true);
+assertEq(Object.getPrototypeOf(fn), MyAsync.prototype);
+
+fn = Reflect.construct(MyAsync, []);
+assertEq(fn instanceof MyAsync, true);
+assertEq(fn instanceof AsyncFunction, true);
+assertEq(Object.getPrototypeOf(fn), MyAsync.prototype);
+
+fn = Reflect.construct(MyAsync, [], MyAsync);
+assertEq(fn instanceof MyAsync, true);
+assertEq(fn instanceof AsyncFunction, true);
+assertEq(Object.getPrototypeOf(fn), MyAsync.prototype);
+
+fn = Reflect.construct(MyAsync, [], AsyncFunction);
+assertEq(fn instanceof MyAsync, false);
+assertEq(fn instanceof AsyncFunction, true);
+assertEq(Object.getPrototypeOf(fn), AsyncFunction.prototype);
+
+
+// Set a different constructor as NewTarget.
+fn = Reflect.construct(MyAsync, [], Array);
+assertEq(fn instanceof MyAsync, false);
+assertEq(fn instanceof AsyncFunction, false);
+assertEq(Object.getPrototypeOf(fn), Array.prototype);
+
+fn = Reflect.construct(AsyncFunction, [], Array);
+assertEq(fn instanceof AsyncFunction, false);
+assertEq(Object.getPrototypeOf(fn), Array.prototype);
+
+
+// The prototype defaults to %AsyncFunctionPrototype% if null.
+function NewTargetNullPrototype() {}
+NewTargetNullPrototype.prototype = null;
+
+fn = Reflect.construct(AsyncFunction, [], NewTargetNullPrototype);
+assertEq(fn instanceof AsyncFunction, true);
+assertEq(Object.getPrototypeOf(fn), AsyncFunction.prototype);
+
+fn = Reflect.construct(MyAsync, [], NewTargetNullPrototype);
+assertEq(fn instanceof MyAsync, false);
+assertEq(fn instanceof AsyncFunction, true);
+assertEq(Object.getPrototypeOf(fn), AsyncFunction.prototype);
+
+
+// "prototype" property is retrieved exactly once.
+var trapLog = [], getLog = [];
+var ProxiedConstructor = new Proxy(AsyncFunction, new Proxy({
+    get(target, propertyKey, receiver) {
+        getLog.push(propertyKey);
+        return Reflect.get(target, propertyKey, receiver);
+    }
+}, {
+    get(target, propertyKey, receiver) {
+        trapLog.push(propertyKey);
+        return Reflect.get(target, propertyKey, receiver);
+    }
+}));
+
+fn = Reflect.construct(AsyncFunction, [], ProxiedConstructor);
+assertEqArray(trapLog, ["get"]);
+assertEqArray(getLog, ["prototype"]);
+assertEq(fn instanceof AsyncFunction, true);
+assertEq(Object.getPrototypeOf(fn), AsyncFunction.prototype);
+
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0);
diff --git a/js/src/tests/ecma_2017/AsyncFunctions/subclass.js b/js/src/tests/ecma_2017/AsyncFunctions/subclass.js
new file mode 100644
index 0000000000..da20ab19b8
--- /dev/null
+++ b/js/src/tests/ecma_2017/AsyncFunctions/subclass.js
@@ -0,0 +1,31 @@
+// |reftest| skip-if(!xulRuntime.shell) -- needs drainJobQueue
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+const AsyncFunction = async function(){}.constructor;
+
+class MyAsync extends AsyncFunction {}
+
+// MyGen inherits from %AsyncFunction%.
+assertEq(Object.getPrototypeOf(MyAsync), AsyncFunction);
+
+// MyGen.prototype inherits from %AsyncFunctionPrototype%.
+assertEq(Object.getPrototypeOf(MyAsync.prototype), AsyncFunction.prototype);
+
+var fn = new MyAsync("return await 'ok';");
+
+// fn inherits from MyAsync.prototype.
+assertEq(Object.getPrototypeOf(fn), MyAsync.prototype);
+
+// Ensure the new async function can be executed.
+var promise = fn();
+
+// promise inherits from %Promise.prototype%.
+assertEq(Object.getPrototypeOf(promise), Promise.prototype);
+
+// Computes the expected result.
+assertEventuallyEq(promise, "ok");
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0);
diff --git a/js/src/tests/ecma_2017/lastIndex-exec.js b/js/src/tests/ecma_2017/lastIndex-exec.js
new file mode 100644
index 0000000000..f42facbe34
--- /dev/null
+++ b/js/src/tests/ecma_2017/lastIndex-exec.js
@@ -0,0 +1,80 @@
+// RegExp.prototype.exec: Test lastIndex changes for ES2017.
+
+// Test various combinations of:
+// - Pattern matches or doesn't match
+// - Global and/or sticky flag is set.
+// - lastIndex exceeds the input string length
+// - lastIndex is +-0
+const testCases = [
+    { regExp: /a/,  lastIndex: 0, input: "a", result: 0 },
+    { regExp: /a/g, lastIndex: 0, input: "a", result: 1 },
+    { regExp: /a/y, lastIndex: 0, input: "a", result: 1 },
+
+    { regExp: /a/,  lastIndex: 0, input: "b", result: 0 },
+    { regExp: /a/g, lastIndex: 0, input: "b", result: 0 },
+    { regExp: /a/y, lastIndex: 0, input: "b", result: 0 },
+
+    { regExp: /a/,  lastIndex: -0, input: "a", result: -0 },
+    { regExp: /a/g, lastIndex: -0, input: "a", result: 1 },
+    { regExp: /a/y, lastIndex: -0, input: "a", result: 1 },
+
+    { regExp: /a/,  lastIndex: -0, input: "b", result: -0 },
+    { regExp: /a/g, lastIndex: -0, input: "b", result: 0 },
+    { regExp: /a/y, lastIndex: -0, input: "b", result: 0 },
+
+    { regExp: /a/,  lastIndex: -1, input: "a", result: -1 },
+    { regExp: /a/g, lastIndex: -1, input: "a", result: 1 },
+    { regExp: /a/y, lastIndex: -1, input: "a", result: 1 },
+
+    { regExp: /a/,  lastIndex: -1, input: "b", result: -1 },
+    { regExp: /a/g, lastIndex: -1, input: "b", result: 0 },
+    { regExp: /a/y, lastIndex: -1, input: "b", result: 0 },
+
+    { regExp: /a/,  lastIndex: 100, input: "a", result: 100 },
+    { regExp: /a/g, lastIndex: 100, input: "a", result: 0 },
+    { regExp: /a/y, lastIndex: 100, input: "a", result: 0 },
+];
+
+// Basic test.
+for (let {regExp, lastIndex, input, result} of testCases) {
+    let re = new RegExp(regExp);
+    re.lastIndex = lastIndex;
+    re.exec(input);
+    assertEq(re.lastIndex, result);
+}
+
+// Test when lastIndex is non-writable.
+for (let {regExp, lastIndex, input} of testCases) {
+    let re = new RegExp(regExp);
+    Object.defineProperty(re, "lastIndex", { value: lastIndex, writable: false });
+    if (re.global || re.sticky) {
+        assertThrowsInstanceOf(() => re.exec(input), TypeError);
+    } else {
+        re.exec(input);
+    }
+    assertEq(re.lastIndex, lastIndex);
+}
+
+// Test when lastIndex is changed to non-writable as a side-effect.
+for (let {regExp, lastIndex, input} of testCases) {
+    let re = new RegExp(regExp);
+    let called = false;
+    re.lastIndex = {
+        valueOf() {
+            assertEq(called, false);
+            called = true;
+            Object.defineProperty(re, "lastIndex", { value: 9000, writable: false });
+            return lastIndex;
+        }
+    };
+    if (re.global || re.sticky) {
+        assertThrowsInstanceOf(() => re.exec(input), TypeError);
+    } else {
+        re.exec(input);
+    }
+    assertEq(re.lastIndex, 9000);
+    assertEq(called, true);
+}
+
+if (typeof reportCompare === "function")
+    reportCompare(true, true);
diff --git a/js/src/tests/ecma_2017/lastIndex-match-or-replace.js b/js/src/tests/ecma_2017/lastIndex-match-or-replace.js
new file mode 100644
index 0000000000..b0a8b537ce
--- /dev/null
+++ b/js/src/tests/ecma_2017/lastIndex-match-or-replace.js
@@ -0,0 +1,122 @@
+// RegExp.prototype[Symbol.match, Symbol.replace]: Test lastIndex changes for ES2017.
+
+// RegExp-like class to test the RegExp method slow paths.
+class DuckRegExp extends RegExp {
+    constructor(pattern, flags) {
+        return Object.create(DuckRegExp.prototype, {
+            regExp: {
+                value: new RegExp(pattern, flags)
+            },
+            lastIndex: {
+                value: 0, writable: true, enumerable: false, configurable: false
+            }
+        });
+    }
+
+    exec(...args) {
+        this.regExp.lastIndex = this.lastIndex;
+        try {
+            return this.regExp.exec(...args);
+        } finally {
+            if (this.global || this.sticky)
+                this.lastIndex = this.regExp.lastIndex;
+        }
+    }
+
+    get source() { return this.regExp.source; }
+
+    get global() { return this.regExp.global; }
+    get ignoreCase() { return this.regExp.ignoreCase; }
+    get multiline() { return this.regExp.multiline; }
+    get sticky() { return this.regExp.sticky; }
+    get unicode() { return this.regExp.unicode; }
+}
+
+// Test various combinations of:
+// - Pattern matches or doesn't match
+// - Global and/or sticky flag is set.
+// - lastIndex exceeds the input string length
+// - lastIndex is +-0
+const testCases = [
+    { regExp: /a/,  lastIndex: 0, input: "a", result: 0 },
+    { regExp: /a/g, lastIndex: 0, input: "a", result: 0 },
+    { regExp: /a/y, lastIndex: 0, input: "a", result: 1 },
+
+    { regExp: /a/,  lastIndex: 0, input: "b", result: 0 },
+    { regExp: /a/g, lastIndex: 0, input: "b", result: 0 },
+    { regExp: /a/y, lastIndex: 0, input: "b", result: 0 },
+
+    { regExp: /a/,  lastIndex: -0, input: "a", result: -0 },
+    { regExp: /a/g, lastIndex: -0, input: "a", result: 0 },
+    { regExp: /a/y, lastIndex: -0, input: "a", result: 1 },
+
+    { regExp: /a/,  lastIndex: -0, input: "b", result: -0 },
+    { regExp: /a/g, lastIndex: -0, input: "b", result: 0 },
+    { regExp: /a/y, lastIndex: -0, input: "b", result: 0 },
+
+    { regExp: /a/,  lastIndex: -1, input: "a", result: -1 },
+    { regExp: /a/g, lastIndex: -1, input: "a", result: 0 },
+    { regExp: /a/y, lastIndex: -1, input: "a", result: 1 },
+
+    { regExp: /a/,  lastIndex: -1, input: "b", result: -1 },
+    { regExp: /a/g, lastIndex: -1, input: "b", result: 0 },
+    { regExp: /a/y, lastIndex: -1, input: "b", result: 0 },
+
+    { regExp: /a/,  lastIndex: 100, input: "a", result: 100 },
+    { regExp: /a/g, lastIndex: 100, input: "a", result: 0 },
+    { regExp: /a/y, lastIndex: 100, input: "a", result: 0 },
+];
+
+for (let method of [RegExp.prototype[Symbol.match], RegExp.prototype[Symbol.replace]]) {
+    for (let Constructor of [RegExp, DuckRegExp]) {
+        // Basic test.
+        for (let {regExp, lastIndex, input, result} of testCases) {
+            let re = new Constructor(regExp);
+            re.lastIndex = lastIndex;
+            Reflect.apply(method, re, [input]);
+            assertEq(re.lastIndex, result);
+        }
+
+        // Test when lastIndex is non-writable.
+        for (let {regExp, lastIndex, input} of testCases) {
+            let re = new Constructor(regExp);
+            Object.defineProperty(re, "lastIndex", { value: lastIndex, writable: false });
+            if (re.global || re.sticky) {
+                assertThrowsInstanceOf(() => Reflect.apply(method, re, [input]), TypeError);
+            } else {
+                Reflect.apply(method, re, [input]);
+            }
+            assertEq(re.lastIndex, lastIndex);
+        }
+
+        // Test when lastIndex is changed to non-writable as a side-effect.
+        for (let {regExp, lastIndex, input, result} of testCases) {
+            let re = new Constructor(regExp);
+            let called = false;
+            re.lastIndex = {
+                valueOf() {
+                    assertEq(called, false);
+                    called = true;
+                    Object.defineProperty(re, "lastIndex", { value: 9000, writable: false });
+                    return lastIndex;
+                }
+            };
+            if (re.sticky) {
+                assertThrowsInstanceOf(() => Reflect.apply(method, re, [input]), TypeError);
+                assertEq(called, true);
+                assertEq(re.lastIndex, 9000);
+            } else if (re.global) {
+                Reflect.apply(method, re, [input]);
+                assertEq(called, false);
+                assertEq(re.lastIndex, result);
+            } else {
+                Reflect.apply(method, re, [input]);
+                assertEq(called, true);
+                assertEq(re.lastIndex, 9000);
+            }
+        }
+    }
+}
+
+if (typeof reportCompare === "function")
+    reportCompare(true, true);
diff --git a/js/src/tests/ecma_2017/lastIndex-search.js b/js/src/tests/ecma_2017/lastIndex-search.js
new file mode 100644
index 0000000000..5953b3a885
--- /dev/null
+++ b/js/src/tests/ecma_2017/lastIndex-search.js
@@ -0,0 +1,118 @@
+// RegExp.prototype[Symbol.search]: Test lastIndex changes for ES2017.
+
+// RegExp-like class to test the RegExp method slow paths.
+class DuckRegExp extends RegExp {
+    constructor(pattern, flags) {
+        return Object.create(DuckRegExp.prototype, {
+            regExp: {
+                value: new RegExp(pattern, flags)
+            },
+            lastIndex: {
+                value: 0, writable: true, enumerable: false, configurable: false
+            }
+        });
+    }
+
+    exec(...args) {
+        this.regExp.lastIndex = this.lastIndex;
+        try {
+            return this.regExp.exec(...args);
+        } finally {
+            if (this.global || this.sticky)
+                this.lastIndex = this.regExp.lastIndex;
+        }
+    }
+
+    get source() { return this.regExp.source; }
+
+    get global() { return this.regExp.global; }
+    get ignoreCase() { return this.regExp.ignoreCase; }
+    get multiline() { return this.regExp.multiline; }
+    get sticky() { return this.regExp.sticky; }
+    get unicode() { return this.regExp.unicode; }
+}
+
+// Test various combinations of:
+// - Pattern matches or doesn't match
+// - Global and/or sticky flag is set.
+// - lastIndex exceeds the input string length
+// - lastIndex is +-0
+const testCasesNotPositiveZero = [
+    { regExp: /a/,  lastIndex: -1, input: "a" },
+    { regExp: /a/g, lastIndex: -1, input: "a" },
+    { regExp: /a/y, lastIndex: -1, input: "a" },
+
+    { regExp: /a/,  lastIndex: 100, input: "a" },
+    { regExp: /a/g, lastIndex: 100, input: "a" },
+    { regExp: /a/y, lastIndex: 100, input: "a" },
+
+    { regExp: /a/,  lastIndex: -1, input: "b" },
+    { regExp: /a/g, lastIndex: -1, input: "b" },
+    { regExp: /a/y, lastIndex: -1, input: "b" },
+
+    { regExp: /a/,  lastIndex: -0, input: "a" },
+    { regExp: /a/g, lastIndex: -0, input: "a" },
+    { regExp: /a/y, lastIndex: -0, input: "a" },
+
+    { regExp: /a/,  lastIndex: -0, input: "b" },
+    { regExp: /a/g, lastIndex: -0, input: "b" },
+    { regExp: /a/y, lastIndex: -0, input: "b" },
+];
+
+const testCasesPositiveZero = [
+    { regExp: /a/,  lastIndex: 0, input: "a" },
+    { regExp: /a/g, lastIndex: 0, input: "a" },
+    { regExp: /a/y, lastIndex: 0, input: "a" },
+
+    { regExp: /a/,  lastIndex: 0, input: "b" },
+    { regExp: /a/g, lastIndex: 0, input: "b" },
+    { regExp: /a/y, lastIndex: 0, input: "b" },
+];
+
+const testCases = [...testCasesNotPositiveZero, ...testCasesPositiveZero];
+
+for (let Constructor of [RegExp, DuckRegExp]) {
+    // Basic test.
+    for (let {regExp, lastIndex, input} of testCases) {
+        let re = new Constructor(regExp);
+        re.lastIndex = lastIndex;
+        re[Symbol.search](input);
+        assertEq(re.lastIndex, lastIndex);
+    }
+
+    // Test when lastIndex is non-writable and not positive zero.
+    for (let {regExp, lastIndex, input} of testCasesNotPositiveZero) {
+        let re = new Constructor(regExp);
+        Object.defineProperty(re, "lastIndex", { value: lastIndex, writable: false });
+        assertThrowsInstanceOf(() => re[Symbol.search](input), TypeError);
+        assertEq(re.lastIndex, lastIndex);
+    }
+
+    // Test when lastIndex is non-writable and positive zero.
+    for (let {regExp, lastIndex, input} of testCasesPositiveZero) {
+        let re = new Constructor(regExp);
+        Object.defineProperty(re, "lastIndex", { value: lastIndex, writable: false });
+        if (re.global || re.sticky) {
+            assertThrowsInstanceOf(() => re[Symbol.search](input), TypeError);
+        } else {
+            re[Symbol.search](input);
+        }
+        assertEq(re.lastIndex, lastIndex);
+    }
+
+    // Test lastIndex isn't converted to a number.
+    for (let {regExp, lastIndex, input} of testCases) {
+        let re = new RegExp(regExp);
+        let badIndex = {
+            valueOf() {
+                assertEq(false, true);
+            }
+        };
+        re.lastIndex = badIndex;
+        re[Symbol.search](input);
+        assertEq(re.lastIndex, badIndex);
+    }
+}
+
+if (typeof reportCompare === "function")
+    reportCompare(true, true);
diff --git a/js/src/tests/ecma_3/String/15.5.4.11.js b/js/src/tests/ecma_3/String/15.5.4.11.js
index 0fd6caaf47..a5515286a0 100644
--- a/js/src/tests/ecma_3/String/15.5.4.11.js
+++ b/js/src/tests/ecma_3/String/15.5.4.11.js
@@ -157,7 +157,7 @@ reportCompare(
 
 rex = /y/, rex.lastIndex = 1;
 reportCompare(
-  "xxx0",
+  "xxx1",
   "xxx".replace(rex, "y") + rex.lastIndex,
   "Section 25"
 );
diff --git a/js/src/tests/ecma_5/Function/arguments-caller-callee.js b/js/src/tests/ecma_5/Function/arguments-caller-callee.js
index 3eda27b492..57efd9eb91 100644
--- a/js/src/tests/ecma_5/Function/arguments-caller-callee.js
+++ b/js/src/tests/ecma_5/Function/arguments-caller-callee.js
@@ -5,7 +5,8 @@
 
 var gTestfile = 'arguments-caller-callee.js';
 var BUGNUMBER = 514563;
-var summary = "arguments.caller and arguments.callee are poison pills in ES5";
+var summary = "arguments.caller and arguments.callee are poison pills in ES5, " +
+              "later changed in ES2017 to only poison pill arguments.callee.";
 
 print(BUGNUMBER + ": " + summary);
 
@@ -31,7 +32,7 @@ function expectTypeError(fun)
 }
 
 function bar() { "use strict"; return arguments; }
-expectTypeError(function barCaller() { bar().caller; });
+assertEq(bar().caller, undefined); // No error when accessing arguments.caller in ES2017+
 expectTypeError(function barCallee() { bar().callee; });
 
 function baz() { return arguments; }
@@ -41,15 +42,12 @@ assertEq(baz().callee, baz);
 // accessor identity
 
 function strictMode() { "use strict"; return arguments; }
-var canonicalTTE = Object.getOwnPropertyDescriptor(strictMode(), "caller").get;
+var canonicalTTE = Object.getOwnPropertyDescriptor(strictMode(), "callee").get;
 
 var args = strictMode();
 
 var argsCaller = Object.getOwnPropertyDescriptor(args, "caller");
-assertEq("get" in argsCaller, true);
-assertEq("set" in argsCaller, true);
-assertEq(argsCaller.get, canonicalTTE);
-assertEq(argsCaller.set, canonicalTTE);
+assertEq(argsCaller, undefined);
 
 var argsCallee = Object.getOwnPropertyDescriptor(args, "callee");
 assertEq("get" in argsCallee, true);
diff --git a/js/src/tests/ecma_5/Function/arguments-property-attributes.js b/js/src/tests/ecma_5/Function/arguments-property-attributes.js
index 994b97ca41..f50c1e6dad 100644
--- a/js/src/tests/ecma_5/Function/arguments-property-attributes.js
+++ b/js/src/tests/ecma_5/Function/arguments-property-attributes.js
@@ -56,7 +56,7 @@ var sa = strictArgs(0, 1);
 
 var strictArgProps = Object.getOwnPropertyNames(sa).sort();
 assertEq(strictArgProps.indexOf("callee") >= 0, true);
-assertEq(strictArgProps.indexOf("caller") >= 0, true);
+assertEq(strictArgProps.indexOf("caller") >= 0, false);
 assertEq(strictArgProps.indexOf("0") >= 0, true);
 assertEq(strictArgProps.indexOf("1") >= 0, true);
 assertEq(strictArgProps.indexOf("length") >= 0, true);
@@ -69,11 +69,7 @@ assertEq(strictCalleeDesc.enumerable, false);
 assertEq(strictCalleeDesc.configurable, false);
 
 var strictCallerDesc = Object.getOwnPropertyDescriptor(sa, "caller");
-assertEq(typeof strictCallerDesc.get, "function");
-assertEq(typeof strictCallerDesc.set, "function");
-assertEq(strictCallerDesc.get, strictCallerDesc.set);
-assertEq(strictCallerDesc.enumerable, false);
-assertEq(strictCallerDesc.configurable, false);
+assertEq(strictCallerDesc, undefined);
 
 var strictZeroDesc = Object.getOwnPropertyDescriptor(sa, "0");
 assertEq(strictZeroDesc.value, 0);
diff --git a/js/src/tests/ecma_5/RegExp/exec.js b/js/src/tests/ecma_5/RegExp/exec.js
index 411f348d91..4284b6e014 100644
--- a/js/src/tests/ecma_5/RegExp/exec.js
+++ b/js/src/tests/ecma_5/RegExp/exec.js
@@ -165,7 +165,7 @@ r = /abc/;
 r.lastIndex = -17;
 res = r.exec("cdefg");
 assertEq(res, null);
-assertEq(r.lastIndex, 0);
+assertEq(r.lastIndex, -17);
 
 r = /abc/g;
 r.lastIndex = -42;
diff --git a/js/src/tests/ecma_5/RegExp/instance-property-storage-introspection.js b/js/src/tests/ecma_5/RegExp/instance-property-storage-introspection.js
index 1f7c7042f0..998d25e2c0 100644
--- a/js/src/tests/ecma_5/RegExp/instance-property-storage-introspection.js
+++ b/js/src/tests/ecma_5/RegExp/instance-property-storage-introspection.js
@@ -40,9 +40,7 @@ function checkDataProperty(obj, p, expect, msg)
 
 // Check a bunch of "empty" regular expressions first.
 
-var choices = [{ msg: "RegExp.prototype",
-                 get: function() { return RegExp.prototype; } },
-               { msg: "new RegExp()",
+var choices = [{ msg: "new RegExp()",
                  get: function() { return new RegExp(); } },
                { msg: "/(?:)/",
                  get: Function("return /(?:)/;") }];
@@ -55,7 +53,6 @@ function checkRegExp(r, msg, lastIndex)
   checkDataProperty(r, "lastIndex", expect, msg);
 }
 
-checkRegExp(RegExp.prototype, "RegExp.prototype", 0);
 checkRegExp(new RegExp(), "new RegExp()", 0);
 checkRegExp(/(?:)/, "/(?:)/", 0);
 checkRegExp(Function("return /(?:)/;")(), 'Function("return /(?:)/;")()', 0);
diff --git a/js/src/tests/ecma_5/extensions/error-tostring-function.js b/js/src/tests/ecma_5/extensions/error-tostring-function.js
index 5e92f1075a..86751c39d8 100644
--- a/js/src/tests/ecma_5/extensions/error-tostring-function.js
+++ b/js/src/tests/ecma_5/extensions/error-tostring-function.js
@@ -27,7 +27,7 @@ assertEq(ErrorToString(function(){}), "");
 
 var fn1 = function() {};
 fn1.message = "ohai";
-assertEq(ErrorToString(fn1), "ohai");
+assertEq(ErrorToString(fn1), "fn1: ohai");
 
 var fn2 = function blerch() {};
 fn2.message = "fnord";
@@ -35,7 +35,7 @@ assertEq(ErrorToString(fn2), "blerch: fnord");
 
 var fn3 = function() {};
 fn3.message = "";
-assertEq(ErrorToString(fn3), "");
+assertEq(ErrorToString(fn3), "fn3");
 
 /******************************************************************************/
 
diff --git a/js/src/tests/ecma_6/Array/from-iterator-close.js b/js/src/tests/ecma_6/Array/from-iterator-close.js
new file mode 100644
index 0000000000..fa97ea282a
--- /dev/null
+++ b/js/src/tests/ecma_6/Array/from-iterator-close.js
@@ -0,0 +1,183 @@
+var BUGNUMBER = 1180306;
+var summary = 'Array.from should close iterator on error';
+
+print(BUGNUMBER + ": " + summary);
+
+function test(ctor, { mapVal=undefined,
+                      nextVal=undefined,
+                      nextThrowVal=undefined,
+                      modifier=undefined,
+                      exceptionVal=undefined,
+                      exceptionType=undefined,
+                      closed=true }) {
+    let iterable = {
+        closed: false,
+        [Symbol.iterator]() {
+            let iterator = {
+                first: true,
+                next() {
+                    if (this.first) {
+                        this.first = false;
+                        if (nextThrowVal)
+                            throw nextThrowVal;
+                        return nextVal;
+                    }
+                    return { value: undefined, done: true };
+                },
+                return() {
+                    iterable.closed = true;
+                    return {};
+                }
+            };
+            if (modifier)
+                modifier(iterator, iterable);
+
+            return iterator;
+        }
+    };
+    if (exceptionVal) {
+        let caught = false;
+        try {
+            ctor.from(iterable, mapVal);
+        } catch (e) {
+            assertEq(e, exceptionVal);
+            caught = true;
+        }
+        assertEq(caught, true);
+    } else if (exceptionType) {
+        assertThrowsInstanceOf(() => ctor.from(iterable, mapVal), exceptionType);
+    } else {
+        ctor.from(iterable, mapVal);
+    }
+    assertEq(iterable.closed, closed);
+}
+
+// == Error cases with close ==
+
+// ES 2017 draft 22.1.2.1 step 5.e.i.1.
+// Cannot test.
+
+// ES 2017 draft 22.1.2.1 step 5.e.vi.2.
+test(Array, {
+    mapVal: () => { throw "map throws"; },
+    nextVal: { value: 1, done: false },
+    exceptionVal: "map throws",
+    closed: true,
+});
+
+// ES 2017 draft 22.1.2.1 step 5.e.ix.
+class MyArray extends Array {
+    constructor() {
+        return new Proxy({}, {
+            defineProperty() {
+                throw "defineProperty throws";
+            }
+        });
+    }
+}
+test(MyArray, {
+    nextVal: { value: 1, done: false },
+    exceptionVal: "defineProperty throws",
+    closed: true,
+});
+
+// ES 2017 draft 7.4.6 step 3.
+// if GetMethod fails, the thrown value should be used.
+test(MyArray, {
+    nextVal: { value: 1, done: false },
+    modifier: (iterator, iterable) => {
+        Object.defineProperty(iterator, "return", {
+            get: function() {
+                iterable.closed = true;
+                throw "return getter throws";
+            }
+        });
+    },
+    exceptionVal: "return getter throws",
+    closed: true,
+});
+test(MyArray, {
+    nextVal: { value: 1, done: false },
+    modifier: (iterator, iterable) => {
+        Object.defineProperty(iterator, "return", {
+            get: function() {
+                iterable.closed = true;
+                return "non object";
+            }
+        });
+    },
+    exceptionType: TypeError,
+    closed: true,
+});
+test(MyArray, {
+    nextVal: { value: 1, done: false },
+    modifier: (iterator, iterable) => {
+        Object.defineProperty(iterator, "return", {
+            get: function() {
+                iterable.closed = true;
+                // Non callable.
+                return {};
+            }
+        });
+    },
+    exceptionType: TypeError,
+    closed: true,
+});
+
+// ES 2017 draft 7.4.6 steps 6.
+// if return method throws, the thrown value should be ignored.
+test(MyArray, {
+    nextVal: { value: 1, done: false },
+    modifier: (iterator, iterable) => {
+        iterator.return = function() {
+            iterable.closed = true;
+            throw "return throws";
+        };
+    },
+    exceptionVal: "defineProperty throws",
+    closed: true,
+});
+
+test(MyArray, {
+    nextVal: { value: 1, done: false },
+    modifier: (iterator, iterable) => {
+        iterator.return = function() {
+            iterable.closed = true;
+            return "non object";
+        };
+    },
+    exceptionVal: "defineProperty throws",
+    closed: true,
+});
+
+// == Error cases without close ==
+
+// ES 2017 draft 22.1.2.1 step 5.e.iii.
+test(Array, {
+    nextThrowVal: "next throws",
+    exceptionVal: "next throws",
+    closed: false,
+});
+
+test(Array, {
+    nextVal: { value: {}, get done() { throw "done getter throws"; } },
+    exceptionVal: "done getter throws",
+    closed: false,
+});
+
+// ES 2017 draft 22.1.2.1 step 5.e.v.
+test(Array, {
+    nextVal: { get value() { throw "value getter throws"; }, done: false },
+    exceptionVal: "value getter throws",
+    closed: false,
+});
+
+// == Successful cases ==
+
+test(Array, {
+    nextVal: { value: 1, done: false },
+    closed: false,
+});
+
+if (typeof reportCompare === 'function')
+  reportCompare(true, true);
diff --git a/js/src/tests/ecma_6/Class/className.js b/js/src/tests/ecma_6/Class/className.js
index a33397a8a3..ad3920c151 100644
--- a/js/src/tests/ecma_6/Class/className.js
+++ b/js/src/tests/ecma_6/Class/className.js
@@ -174,27 +174,29 @@ testName(ExtendedExpr3, "base", false, false, false);
 
 // Anonymous class expressions don't get name properties unless specified in a
 // static manner.
-let Anon = class {
+// Use property assignment to avoid setting name property.
+let tmp = {};
+let Anon = tmp.value = class {
     constructor() {}
 };
 testName(Anon, "", false, false, false);
 
-let AnonDefault = class { };
+let AnonDefault = tmp.value = class { };
 testName(AnonDefault, "", false, false, false);
 
-let AnonWithGetter = class {
+let AnonWithGetter = tmp.value = class {
     constructor() {}
     static get name() { return "base"; }
 };
 testName(AnonWithGetter, "base", false, true, false);
 
-let AnonWithSetter = class {
+let AnonWithSetter = tmp.value = class {
     constructor() {}
     static set name(v) {}
 };
 testName(AnonWithSetter, undefined, false, false, true);
 
-let AnonWithGetterSetter = class {
+let AnonWithGetterSetter = tmp.value = class {
     constructor() {}
     static get name() { return "base"; }
     static set name(v) {}
@@ -202,15 +204,15 @@ let AnonWithGetterSetter = class {
 testName(AnonWithGetterSetter, "base", false, true, true);
 
 
-let ExtendedAnon1 = class extends Anon {
+let ExtendedAnon1 = tmp.value = class extends Anon {
     constructor() {}
 };
 testName(ExtendedAnon1, "", false, false, false);
 
-let ExtendedAnonDefault = class extends Anon { };
+let ExtendedAnonDefault = tmp.value = class extends Anon { };
 testName(ExtendedAnonDefault, "", false, false, false);
 
-let ExtendedAnon2 = class extends AnonWithGetterSetter {
+let ExtendedAnon2 = tmp.value = class extends AnonWithGetterSetter {
     constructor() {}
     static get name() { return "extend"; }
 };
@@ -218,7 +220,7 @@ testName(ExtendedAnon2, "extend", false, true, false);
 delete ExtendedAnon2.name;
 testName(ExtendedAnon2, "base", false, false, false);
 
-let ExtendedAnon3 = class extends AnonWithGetterSetter {
+let ExtendedAnon3 = tmp.value = class extends AnonWithGetterSetter {
     constructor() {}
     static set name(v) {}
 };
diff --git a/js/src/tests/ecma_6/Destructuring/array-default-class.js b/js/src/tests/ecma_6/Destructuring/array-default-class.js
new file mode 100644
index 0000000000..5aa9c579b1
--- /dev/null
+++ b/js/src/tests/ecma_6/Destructuring/array-default-class.js
@@ -0,0 +1,25 @@
+var BUGNUMBER = 1322314;
+var summary = "Function in computed property in class expression in array destructuring default";
+
+print(BUGNUMBER + ": " + summary);
+
+function* g([
+  a = class E {
+    [ (function() { return "foo"; })() ]() {
+      return 10;
+    }
+  }
+]) {
+  yield a;
+}
+
+let C = [...g([])][0];
+let x = new C();
+assertEq(x.foo(), 10);
+
+C = [...g([undefined])][0];
+x = new C();
+assertEq(x.foo(), 10);
+
+if (typeof reportCompare === "function")
+  reportCompare(0, 0);
diff --git a/js/src/tests/ecma_6/Destructuring/array-iterator-close.js b/js/src/tests/ecma_6/Destructuring/array-iterator-close.js
new file mode 100644
index 0000000000..ed35135dba
--- /dev/null
+++ b/js/src/tests/ecma_6/Destructuring/array-iterator-close.js
@@ -0,0 +1,93 @@
+// Tests that IteratorClose is called in array destructuring patterns.
+
+function test() {
+    var returnCalled = 0;
+    var returnCalledExpected = 0;
+    var iterable = {};
+
+    // empty [] calls IteratorClose regardless of "done" on the result.
+    iterable[Symbol.iterator] = makeIterator({
+        next: function() {
+            return { done: true };
+        },
+        ret: function() {
+            returnCalled++;
+            return {};
+        }
+    });
+    var [] = iterable;
+    assertEq(returnCalled, ++returnCalledExpected);
+
+    iterable[Symbol.iterator] = makeIterator({
+        ret: function() {
+            returnCalled++;
+            return {};
+        }
+    });
+    var [] = iterable;
+    assertEq(returnCalled, ++returnCalledExpected);
+
+    // Non-empty destructuring calls IteratorClose if iterator is not done by
+    // the end of destructuring.
+    var [a,b] = iterable;
+    assertEq(returnCalled, ++returnCalledExpected);
+    var [c,] = iterable;
+    assertEq(returnCalled, ++returnCalledExpected);
+
+    // throw in lhs ref calls IteratorClose
+    function throwlhs() {
+        throw "in lhs";
+    }
+    assertThrowsValue(function() {
+        0, [...{}[throwlhs()]] = iterable;
+    }, "in lhs");
+    assertEq(returnCalled, ++returnCalledExpected);
+
+    // throw in lhs ref calls IteratorClose with falsy "done".
+    iterable[Symbol.iterator] = makeIterator({
+        next: function() {
+            // "done" is undefined.
+            return {};
+        },
+        ret: function() {
+            returnCalled++;
+            return {};
+        }
+    });
+    assertThrowsValue(function() {
+        0, [...{}[throwlhs()]] = iterable;
+    }, "in lhs");
+    assertEq(returnCalled, ++returnCalledExpected);
+
+    // throw in iter.next doesn't call IteratorClose
+    iterable[Symbol.iterator] = makeIterator({
+        next: function() {
+            throw "in next";
+        },
+        ret: function() {
+            returnCalled++;
+            return {};
+        }
+    });
+    assertThrowsValue(function() {
+        var [d] = iterable;
+    }, "in next");
+    assertEq(returnCalled, returnCalledExpected);
+
+    // "return" must return an Object.
+    iterable[Symbol.iterator] = makeIterator({
+        ret: function() {
+            returnCalled++;
+            return 42;
+        }
+    });
+    assertThrowsInstanceOf(function() {
+        var [] = iterable;
+    }, TypeError);
+    assertEq(returnCalled, ++returnCalledExpected);
+}
+
+test();
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0);
diff --git a/js/src/tests/ecma_6/Destructuring/order-super.js b/js/src/tests/ecma_6/Destructuring/order-super.js
new file mode 100644
index 0000000000..afe11e2d91
--- /dev/null
+++ b/js/src/tests/ecma_6/Destructuring/order-super.js
@@ -0,0 +1,727 @@
+var BUGNUMBER = 1204028;
+var summary = "Destructuring should evaluate lhs reference before rhs in super property";
+
+if (typeof assertEq === "undefined") {
+  assertEq = function(a, b) {
+    if (a !== b)
+      throw new Error(`expected ${b}, got ${a}\n${new Error().stack}`);
+  };
+}
+
+print(BUGNUMBER + ": " + summary);
+
+let logs = [];
+function log(x) {
+  logs.push(x);
+}
+
+let unwrapMap = new Map();
+function unwrap(maybeWrapped) {
+  if (unwrapMap.has(maybeWrapped))
+    return unwrapMap.get(maybeWrapped);
+  return maybeWrapped;
+}
+function ToString(name) {
+  if (name == Symbol.iterator)
+    return "@@iterator";
+  return String(name);
+}
+function logger(obj, prefix=[]) {
+  let wrapped = new Proxy(obj, {
+    get(that, name) {
+      if (name == "return") {
+        // FIXME: Bug 1147371.
+        // We ignore IteratorClose for now.
+        return obj[name];
+      }
+
+      let names = prefix.concat(ToString(name));
+      log("rhs get " + names.join("::"));
+      let v = obj[name];
+      if (typeof v === "object" || typeof v === "function")
+        return logger(v, names);
+      return v;
+    },
+    apply(that, thisArg, args) {
+      let names = prefix.slice();
+      log("rhs call " + names.join("::"));
+      let v = obj.apply(unwrap(thisArg), args);
+      if (typeof v === "object" || typeof v === "function") {
+        names[names.length - 1] += "()";
+        return logger(v, names);
+      }
+      return v;
+    }
+  });
+  unwrapMap.set(wrapped, obj);
+  return wrapped;
+}
+
+class C1 {
+  constructor() {
+    this.clear();
+  }
+  clear() {
+    this.values = {};
+  }
+}
+for (let name of [
+  "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m",
+  "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z",
+  "0", "1", "length"
+]) {
+  Object.defineProperty(C1.prototype, name, {
+    set: function(value) {
+      log("lhs set " + name);
+      this.values[name] = value;
+    }
+  });
+}
+class C2 extends C1 {
+  constructor() {
+    super();
+
+    let clear = () => {
+      logs = [];
+      this.clear();
+    };
+
+    // Array.
+
+    clear();
+    [
+      super.a
+    ] = logger(["A"]);
+    assertEq(logs.join(","),
+             [
+               "rhs get @@iterator",
+               "rhs call @@iterator",
+
+               "rhs get @@iterator()::next",
+               "rhs call @@iterator()::next",
+               "rhs get @@iterator()::next()::done",
+               "rhs get @@iterator()::next()::value",
+               "lhs set a",
+             ].join(","));
+    assertEq(this.values.a, "A");
+
+    clear();
+    [
+      super[ (log("lhs before name a"), "a") ]
+    ] = logger(["A"]);
+    assertEq(logs.join(","),
+             [
+               "rhs get @@iterator",
+               "rhs call @@iterator",
+
+               "lhs before name a",
+               "rhs get @@iterator()::next",
+               "rhs call @@iterator()::next",
+               "rhs get @@iterator()::next()::done",
+               "rhs get @@iterator()::next()::value",
+               "lhs set a",
+             ].join(","));
+    assertEq(this.values.a, "A");
+
+    // Array rest.
+
+    clear();
+    [
+      ...super.a
+    ] = logger(["A", "B", "C"]);
+    assertEq(logs.join(","),
+             [
+               "rhs get @@iterator",
+               "rhs call @@iterator",
+
+               "rhs get @@iterator()::next",
+               "rhs call @@iterator()::next",
+               "rhs get @@iterator()::next()::done",
+               "rhs get @@iterator()::next()::value",
+               "rhs get @@iterator()::next",
+               "rhs call @@iterator()::next",
+               "rhs get @@iterator()::next()::done",
+               "rhs get @@iterator()::next()::value",
+               "rhs get @@iterator()::next",
+               "rhs call @@iterator()::next",
+               "rhs get @@iterator()::next()::done",
+               "rhs get @@iterator()::next()::value",
+               "rhs get @@iterator()::next",
+               "rhs call @@iterator()::next",
+               "rhs get @@iterator()::next()::done",
+               "lhs set a",
+             ].join(","));
+    assertEq(this.values.a.join(","), "A,B,C");
+
+    clear();
+    [
+      ...super[ (log("lhs before name a"), "a") ]
+    ] = logger(["A", "B", "C"]);;
+    assertEq(logs.join(","),
+             [
+               "rhs get @@iterator",
+               "rhs call @@iterator",
+
+               "lhs before name a",
+               "rhs get @@iterator()::next",
+               "rhs call @@iterator()::next",
+               "rhs get @@iterator()::next()::done",
+               "rhs get @@iterator()::next()::value",
+               "rhs get @@iterator()::next",
+               "rhs call @@iterator()::next",
+               "rhs get @@iterator()::next()::done",
+               "rhs get @@iterator()::next()::value",
+               "rhs get @@iterator()::next",
+               "rhs call @@iterator()::next",
+               "rhs get @@iterator()::next()::done",
+               "rhs get @@iterator()::next()::value",
+               "rhs get @@iterator()::next",
+               "rhs call @@iterator()::next",
+               "rhs get @@iterator()::next()::done",
+               "lhs set a",
+             ].join(","));
+    assertEq(this.values.a.join(","), "A,B,C");
+
+    // Array combined.
+
+    clear();
+    [
+      super.a,
+      super[ (log("lhs before name b"), "b") ],
+      ...super[ (log("lhs before name c"), "c") ]
+    ] = logger(["A", "B", "C"]);
+    assertEq(logs.join(","),
+             [
+               "rhs get @@iterator",
+               "rhs call @@iterator",
+
+               "rhs get @@iterator()::next",
+               "rhs call @@iterator()::next",
+               "rhs get @@iterator()::next()::done",
+               "rhs get @@iterator()::next()::value",
+               "lhs set a",
+
+               "lhs before name b",
+               "rhs get @@iterator()::next",
+               "rhs call @@iterator()::next",
+               "rhs get @@iterator()::next()::done",
+               "rhs get @@iterator()::next()::value",
+               "lhs set b",
+
+               "lhs before name c",
+               "rhs get @@iterator()::next",
+               "rhs call @@iterator()::next",
+               "rhs get @@iterator()::next()::done",
+               "rhs get @@iterator()::next()::value",
+               "rhs get @@iterator()::next",
+               "rhs call @@iterator()::next",
+               "rhs get @@iterator()::next()::done",
+               "lhs set c",
+             ].join(","));
+    assertEq(this.values.a, "A");
+    assertEq(this.values.b, "B");
+    assertEq(this.values.c.join(","), "C");
+
+    // Object.
+
+    clear();
+    ({
+      a: super.a
+    } = logger({a: "A"}));
+    assertEq(logs.join(","),
+             [
+               "rhs get a",
+               "lhs set a",
+             ].join(","));
+    assertEq(this.values.a, "A");
+
+    clear();
+    ({
+      a: super[ (log("lhs before name a"), "a") ]
+    } = logger({a: "A"}));
+    assertEq(logs.join(","),
+             [
+               "lhs before name a",
+               "rhs get a",
+               "lhs set a",
+             ].join(","));
+    assertEq(this.values.a, "A");
+
+    // Object combined.
+
+    clear();
+    ({
+      a: super.a,
+      b: super[ (log("lhs before name b"), "b") ]
+    } = logger({a: "A", b: "B"}));
+    assertEq(logs.join(","),
+             [
+               "rhs get a",
+               "lhs set a",
+
+               "lhs before name b",
+               "rhs get b",
+               "lhs set b",
+             ].join(","));
+    assertEq(this.values.a, "A");
+    assertEq(this.values.b, "B");
+
+    // == Nested ==
+
+    // Array -> Array
+
+    clear();
+    [
+      [
+        super[ (log("lhs before name a"), "a") ],
+        ...super[ (log("lhs before name b"), "b") ]
+      ]
+    ] = logger([["A", "B"]]);
+    assertEq(logs.join(","),
+             [
+               "rhs get @@iterator",
+               "rhs call @@iterator",
+
+               "rhs get @@iterator()::next",
+               "rhs call @@iterator()::next",
+               "rhs get @@iterator()::next()::done",
+               "rhs get @@iterator()::next()::value",
+               "rhs get @@iterator()::next()::value::@@iterator",
+               "rhs call @@iterator()::next()::value::@@iterator",
+
+               "lhs before name a",
+               "rhs get @@iterator()::next()::value::@@iterator()::next",
+               "rhs call @@iterator()::next()::value::@@iterator()::next",
+               "rhs get @@iterator()::next()::value::@@iterator()::next()::done",
+               "rhs get @@iterator()::next()::value::@@iterator()::next()::value",
+               "lhs set a",
+
+               "lhs before name b",
+               "rhs get @@iterator()::next()::value::@@iterator()::next",
+               "rhs call @@iterator()::next()::value::@@iterator()::next",
+               "rhs get @@iterator()::next()::value::@@iterator()::next()::done",
+               "rhs get @@iterator()::next()::value::@@iterator()::next()::value",
+               "rhs get @@iterator()::next()::value::@@iterator()::next",
+               "rhs call @@iterator()::next()::value::@@iterator()::next",
+               "rhs get @@iterator()::next()::value::@@iterator()::next()::done",
+               "lhs set b",
+             ].join(","));
+    assertEq(this.values.a, "A");
+    assertEq(this.values.b.length, 1);
+    assertEq(this.values.b[0], "B");
+
+    // Array rest -> Array
+
+    clear();
+    [
+      ...[
+        super[ (log("lhs before name a"), "a") ],
+        ...super[ (log("lhs before name b"), "b") ]
+      ]
+    ] = logger(["A", "B"]);
+    assertEq(logs.join(","),
+             [
+               "rhs get @@iterator",
+               "rhs call @@iterator",
+
+               "rhs get @@iterator()::next",
+               "rhs call @@iterator()::next",
+               "rhs get @@iterator()::next()::done",
+               "rhs get @@iterator()::next()::value",
+               "rhs get @@iterator()::next",
+               "rhs call @@iterator()::next",
+               "rhs get @@iterator()::next()::done",
+               "rhs get @@iterator()::next()::value",
+               "rhs get @@iterator()::next",
+               "rhs call @@iterator()::next",
+               "rhs get @@iterator()::next()::done",
+
+               "lhs before name a",
+               "lhs set a",
+
+               "lhs before name b",
+               "lhs set b",
+             ].join(","));
+    assertEq(this.values.a, "A");
+    assertEq(this.values.b.join(","), "B");
+
+    // Array -> Object
+    clear();
+    [
+      {
+        a: super[ (log("lhs before name a"), "a") ]
+      }
+    ] = logger([{a: "A"}]);
+    assertEq(logs.join(","),
+             [
+               "rhs get @@iterator",
+               "rhs call @@iterator",
+
+               "rhs get @@iterator()::next",
+               "rhs call @@iterator()::next",
+               "rhs get @@iterator()::next()::done",
+               "rhs get @@iterator()::next()::value",
+
+               "lhs before name a",
+               "rhs get @@iterator()::next()::value::a",
+               "lhs set a",
+             ].join(","));
+    assertEq(this.values.a, "A");
+
+    // Array rest -> Object
+    clear();
+    [
+      ...{
+        0: super[ (log("lhs before name 0"), "0") ],
+        1: super[ (log("lhs before name 1"), "1") ],
+        length: super[ (log("lhs before name length"), "length") ],
+      }
+    ] = logger(["A", "B"]);
+    assertEq(logs.join(","),
+             [
+               "rhs get @@iterator",
+               "rhs call @@iterator",
+
+               "rhs get @@iterator()::next",
+               "rhs call @@iterator()::next",
+               "rhs get @@iterator()::next()::done",
+               "rhs get @@iterator()::next()::value",
+               "rhs get @@iterator()::next",
+               "rhs call @@iterator()::next",
+               "rhs get @@iterator()::next()::done",
+               "rhs get @@iterator()::next()::value",
+               "rhs get @@iterator()::next",
+               "rhs call @@iterator()::next",
+               "rhs get @@iterator()::next()::done",
+
+               "lhs before name 0",
+               "lhs set 0",
+
+               "lhs before name 1",
+               "lhs set 1",
+
+               "lhs before name length",
+               "lhs set length",
+             ].join(","));
+    assertEq(this.values["0"], "A");
+    assertEq(this.values["1"], "B");
+    assertEq(this.values.length, 2);
+
+    // Object -> Array
+    clear();
+    ({
+      a: [
+        super[ (log("lhs before name b"), "b") ]
+      ]
+    } = logger({a: ["B"]}));
+    assertEq(logs.join(","),
+             [
+               "rhs get a",
+               "rhs get a::@@iterator",
+               "rhs call a::@@iterator",
+
+               "lhs before name b",
+               "rhs get a::@@iterator()::next",
+               "rhs call a::@@iterator()::next",
+               "rhs get a::@@iterator()::next()::done",
+               "rhs get a::@@iterator()::next()::value",
+               "lhs set b",
+             ].join(","));
+    assertEq(this.values.b, "B");
+
+    // Object -> Object
+    clear();
+    ({
+      a: {
+        b: super[ (log("lhs before name b"), "b") ]
+      }
+    } = logger({a: {b: "B"}}));
+    assertEq(logs.join(","),
+             [
+               "rhs get a",
+               "lhs before name b",
+               "rhs get a::b",
+               "lhs set b",
+             ].join(","));
+    assertEq(this.values.b, "B");
+
+    // All combined
+
+    clear();
+    [
+      super[ (log("lhs before name a"), "a") ],
+      [
+        super[ (log("lhs before name b"), "b") ],
+        {
+          c: super[ (log("lhs before name c"), "c") ],
+          d: {
+            e: super[ (log("lhs before name e"), "e") ],
+            f: [
+              super[ (log("lhs before name g"), "g") ]
+            ]
+          }
+        }
+      ],
+      {
+        h: super[ (log("lhs before name h"), "h") ],
+        i: [
+          super[ (log("lhs before name j"), "j") ],
+          {
+            k: [
+              super[ (log("lhs before name l"), "l") ]
+            ]
+          }
+        ]
+      },
+      ...[
+        super[ (log("lhs before name m"), "m") ],
+        [
+          super[ (log("lhs before name n"), "n") ],
+          {
+            o: super[ (log("lhs before name o"), "o") ],
+            p: {
+              q: super[ (log("lhs before name q"), "q") ],
+              r: [
+                super[ (log("lhs before name s"), "s") ]
+              ]
+            }
+          }
+        ],
+        ...{
+          0: super[ (log("lhs before name t"), "t") ],
+          1: [
+            super[ (log("lhs before name u"), "u") ],
+            {
+              v: super[ (log("lhs before name v"), "v") ],
+              w: {
+                x: super[ (log("lhs before name x"), "x") ],
+                y: [
+                  super[ (log("lhs before name z"), "z") ]
+                ]
+              }
+            }
+          ],
+          length: super[ (log("lhs before name length"), "length") ],
+        }
+      ]
+    ] = logger(["A",
+                ["B", {c: "C", d: {e: "E", f: ["G"]}}],
+                {h: "H", i: ["J", {k: ["L"]}]},
+                "M",
+                ["N", {o: "O", p: {q: "Q", r: ["S"]}}],
+                "T", ["U", {v: "V", w: {x: "X", y: ["Z"]}}]]);
+    assertEq(logs.join(","),
+             [
+               "rhs get @@iterator",
+               "rhs call @@iterator",
+
+               "lhs before name a",
+               "rhs get @@iterator()::next",
+               "rhs call @@iterator()::next",
+               "rhs get @@iterator()::next()::done",
+               "rhs get @@iterator()::next()::value",
+               "lhs set a",
+
+               "rhs get @@iterator()::next",
+               "rhs call @@iterator()::next",
+               "rhs get @@iterator()::next()::done",
+               "rhs get @@iterator()::next()::value",
+               "rhs get @@iterator()::next()::value::@@iterator",
+               "rhs call @@iterator()::next()::value::@@iterator",
+
+               "lhs before name b",
+               "rhs get @@iterator()::next()::value::@@iterator()::next",
+               "rhs call @@iterator()::next()::value::@@iterator()::next",
+               "rhs get @@iterator()::next()::value::@@iterator()::next()::done",
+               "rhs get @@iterator()::next()::value::@@iterator()::next()::value",
+               "lhs set b",
+
+               "rhs get @@iterator()::next()::value::@@iterator()::next",
+               "rhs call @@iterator()::next()::value::@@iterator()::next",
+               "rhs get @@iterator()::next()::value::@@iterator()::next()::done",
+               "rhs get @@iterator()::next()::value::@@iterator()::next()::value",
+
+               "lhs before name c",
+               "rhs get @@iterator()::next()::value::@@iterator()::next()::value::c",
+               "lhs set c",
+
+               "rhs get @@iterator()::next()::value::@@iterator()::next()::value::d",
+
+               "lhs before name e",
+               "rhs get @@iterator()::next()::value::@@iterator()::next()::value::d::e",
+               "lhs set e",
+
+               "rhs get @@iterator()::next()::value::@@iterator()::next()::value::d::f",
+               "rhs get @@iterator()::next()::value::@@iterator()::next()::value::d::f::@@iterator",
+               "rhs call @@iterator()::next()::value::@@iterator()::next()::value::d::f::@@iterator",
+
+               "lhs before name g",
+               "rhs get @@iterator()::next()::value::@@iterator()::next()::value::d::f::@@iterator()::next",
+               "rhs call @@iterator()::next()::value::@@iterator()::next()::value::d::f::@@iterator()::next",
+               "rhs get @@iterator()::next()::value::@@iterator()::next()::value::d::f::@@iterator()::next()::done",
+               "rhs get @@iterator()::next()::value::@@iterator()::next()::value::d::f::@@iterator()::next()::value",
+               "lhs set g",
+
+               "rhs get @@iterator()::next",
+               "rhs call @@iterator()::next",
+               "rhs get @@iterator()::next()::done",
+               "rhs get @@iterator()::next()::value",
+
+               "lhs before name h",
+               "rhs get @@iterator()::next()::value::h",
+               "lhs set h",
+
+               "rhs get @@iterator()::next()::value::i",
+               "rhs get @@iterator()::next()::value::i::@@iterator",
+               "rhs call @@iterator()::next()::value::i::@@iterator",
+
+               "lhs before name j",
+               "rhs get @@iterator()::next()::value::i::@@iterator()::next",
+               "rhs call @@iterator()::next()::value::i::@@iterator()::next",
+               "rhs get @@iterator()::next()::value::i::@@iterator()::next()::done",
+               "rhs get @@iterator()::next()::value::i::@@iterator()::next()::value",
+               "lhs set j",
+
+               "rhs get @@iterator()::next()::value::i::@@iterator()::next",
+               "rhs call @@iterator()::next()::value::i::@@iterator()::next",
+               "rhs get @@iterator()::next()::value::i::@@iterator()::next()::done",
+               "rhs get @@iterator()::next()::value::i::@@iterator()::next()::value",
+
+               "rhs get @@iterator()::next()::value::i::@@iterator()::next()::value::k",
+               "rhs get @@iterator()::next()::value::i::@@iterator()::next()::value::k::@@iterator",
+               "rhs call @@iterator()::next()::value::i::@@iterator()::next()::value::k::@@iterator",
+
+               "lhs before name l",
+               "rhs get @@iterator()::next()::value::i::@@iterator()::next()::value::k::@@iterator()::next",
+               "rhs call @@iterator()::next()::value::i::@@iterator()::next()::value::k::@@iterator()::next",
+               "rhs get @@iterator()::next()::value::i::@@iterator()::next()::value::k::@@iterator()::next()::done",
+               "rhs get @@iterator()::next()::value::i::@@iterator()::next()::value::k::@@iterator()::next()::value",
+               "lhs set l",
+
+               "rhs get @@iterator()::next",
+               "rhs call @@iterator()::next",
+               "rhs get @@iterator()::next()::done",
+               "rhs get @@iterator()::next()::value",
+               "rhs get @@iterator()::next",
+               "rhs call @@iterator()::next",
+               "rhs get @@iterator()::next()::done",
+               "rhs get @@iterator()::next()::value",
+               "rhs get @@iterator()::next",
+               "rhs call @@iterator()::next",
+               "rhs get @@iterator()::next()::done",
+               "rhs get @@iterator()::next()::value",
+               "rhs get @@iterator()::next",
+               "rhs call @@iterator()::next",
+               "rhs get @@iterator()::next()::done",
+               "rhs get @@iterator()::next()::value",
+               "rhs get @@iterator()::next",
+               "rhs call @@iterator()::next",
+               "rhs get @@iterator()::next()::done",
+
+               "lhs before name m",
+               "lhs set m",
+
+               "rhs get @@iterator()::next()::value::@@iterator",
+               "rhs call @@iterator()::next()::value::@@iterator",
+
+               "lhs before name n",
+               "rhs get @@iterator()::next()::value::@@iterator()::next",
+               "rhs call @@iterator()::next()::value::@@iterator()::next",
+               "rhs get @@iterator()::next()::value::@@iterator()::next()::done",
+               "rhs get @@iterator()::next()::value::@@iterator()::next()::value",
+               "lhs set n",
+
+               "rhs get @@iterator()::next()::value::@@iterator()::next",
+               "rhs call @@iterator()::next()::value::@@iterator()::next",
+               "rhs get @@iterator()::next()::value::@@iterator()::next()::done",
+               "rhs get @@iterator()::next()::value::@@iterator()::next()::value",
+
+               "lhs before name o",
+               "rhs get @@iterator()::next()::value::@@iterator()::next()::value::o",
+               "lhs set o",
+
+               "rhs get @@iterator()::next()::value::@@iterator()::next()::value::p",
+
+               "lhs before name q",
+               "rhs get @@iterator()::next()::value::@@iterator()::next()::value::p::q",
+               "lhs set q",
+
+               "rhs get @@iterator()::next()::value::@@iterator()::next()::value::p::r",
+               "rhs get @@iterator()::next()::value::@@iterator()::next()::value::p::r::@@iterator",
+               "rhs call @@iterator()::next()::value::@@iterator()::next()::value::p::r::@@iterator",
+
+               "lhs before name s",
+               "rhs get @@iterator()::next()::value::@@iterator()::next()::value::p::r::@@iterator()::next",
+               "rhs call @@iterator()::next()::value::@@iterator()::next()::value::p::r::@@iterator()::next",
+               "rhs get @@iterator()::next()::value::@@iterator()::next()::value::p::r::@@iterator()::next()::done",
+               "rhs get @@iterator()::next()::value::@@iterator()::next()::value::p::r::@@iterator()::next()::value",
+               "lhs set s",
+
+               "lhs before name t",
+               "lhs set t",
+
+               "rhs get @@iterator()::next()::value::@@iterator",
+               "rhs call @@iterator()::next()::value::@@iterator",
+
+               "lhs before name u",
+               "rhs get @@iterator()::next()::value::@@iterator()::next",
+               "rhs call @@iterator()::next()::value::@@iterator()::next",
+               "rhs get @@iterator()::next()::value::@@iterator()::next()::done",
+               "rhs get @@iterator()::next()::value::@@iterator()::next()::value",
+               "lhs set u",
+
+               "rhs get @@iterator()::next()::value::@@iterator()::next",
+               "rhs call @@iterator()::next()::value::@@iterator()::next",
+               "rhs get @@iterator()::next()::value::@@iterator()::next()::done",
+               "rhs get @@iterator()::next()::value::@@iterator()::next()::value",
+
+               "lhs before name v",
+               "rhs get @@iterator()::next()::value::@@iterator()::next()::value::v",
+               "lhs set v",
+
+               "rhs get @@iterator()::next()::value::@@iterator()::next()::value::w",
+
+               "lhs before name x",
+               "rhs get @@iterator()::next()::value::@@iterator()::next()::value::w::x",
+               "lhs set x",
+
+               "rhs get @@iterator()::next()::value::@@iterator()::next()::value::w::y",
+               "rhs get @@iterator()::next()::value::@@iterator()::next()::value::w::y::@@iterator",
+               "rhs call @@iterator()::next()::value::@@iterator()::next()::value::w::y::@@iterator",
+
+               "lhs before name z",
+               "rhs get @@iterator()::next()::value::@@iterator()::next()::value::w::y::@@iterator()::next",
+               "rhs call @@iterator()::next()::value::@@iterator()::next()::value::w::y::@@iterator()::next",
+               "rhs get @@iterator()::next()::value::@@iterator()::next()::value::w::y::@@iterator()::next()::done",
+               "rhs get @@iterator()::next()::value::@@iterator()::next()::value::w::y::@@iterator()::next()::value",
+               "lhs set z",
+
+               "lhs before name length",
+               "lhs set length",
+             ].join(","));
+    assertEq(this.values.a, "A");
+    assertEq(this.values.b, "B");
+    assertEq(this.values.c, "C");
+    assertEq(this.values.e, "E");
+    assertEq(this.values.g, "G");
+    assertEq(this.values.h, "H");
+    assertEq(this.values.j, "J");
+    assertEq(this.values.l, "L");
+    assertEq(this.values.m, "M");
+    assertEq(this.values.n, "N");
+    assertEq(this.values.o, "O");
+    assertEq(this.values.q, "Q");
+    assertEq(this.values.s, "S");
+    assertEq(this.values.t, "T");
+    assertEq(this.values.u, "U");
+    assertEq(this.values.v, "V");
+    assertEq(this.values.x, "X");
+    assertEq(this.values.z, "Z");
+    assertEq(this.values.length, 2);
+  }
+}
+
+new C2();
+
+if (typeof reportCompare === "function")
+    reportCompare(true, true);
diff --git a/js/src/tests/ecma_6/Destructuring/order.js b/js/src/tests/ecma_6/Destructuring/order.js
new file mode 100644
index 0000000000..4eb48cd2b0
--- /dev/null
+++ b/js/src/tests/ecma_6/Destructuring/order.js
@@ -0,0 +1,745 @@
+var BUGNUMBER = 1204028;
+var summary = "Destructuring should evaluate lhs reference before rhs";
+
+print(BUGNUMBER + ": " + summary);
+
+let storage = {
+  clear() {
+    this.values = {};
+  }
+};
+storage.clear();
+let obj = new Proxy(storage, {
+  set(that, name, value) {
+    log("lhs set " + name);
+    storage.values[name] = value;
+  }
+});
+
+let logs = [];
+function log(x) {
+  logs.push(x);
+}
+
+function clear() {
+  logs = [];
+  storage.clear();
+}
+
+let unwrapMap = new Map();
+function unwrap(maybeWrapped) {
+  if (unwrapMap.has(maybeWrapped))
+    return unwrapMap.get(maybeWrapped);
+  return maybeWrapped;
+}
+function ToString(name) {
+  if (name == Symbol.iterator)
+    return "@@iterator";
+  return String(name);
+}
+function logger(obj, prefix=[]) {
+  let wrapped = new Proxy(obj, {
+    get(that, name) {
+      if (name == "return") {
+        // FIXME: Bug 1147371.
+        // We ignore IteratorClose for now.
+        return obj[name];
+      }
+
+      let names = prefix.concat(ToString(name));
+      log("rhs get " + names.join("::"));
+      let v = obj[name];
+      if (typeof v === "object" || typeof v === "function")
+        return logger(v, names);
+      return v;
+    },
+    apply(that, thisArg, args) {
+      let names = prefix.slice();
+      log("rhs call " + names.join("::"));
+      let v = obj.apply(unwrap(thisArg), args);
+      if (typeof v === "object" || typeof v === "function") {
+        names[names.length - 1] += "()";
+        return logger(v, names);
+      }
+      return v;
+    }
+  });
+  unwrapMap.set(wrapped, obj);
+  return wrapped;
+}
+
+// Array.
+
+clear();
+[
+  ( log("lhs before obj a"), obj ).a
+] = logger(["A"]);
+assertEq(logs.join(","),
+         [
+           "rhs get @@iterator",
+           "rhs call @@iterator",
+
+           "lhs before obj a",
+           "rhs get @@iterator()::next",
+           "rhs call @@iterator()::next",
+           "rhs get @@iterator()::next()::done",
+           "rhs get @@iterator()::next()::value",
+           "lhs set a",
+         ].join(","));
+assertEq(storage.values.a, "A");
+
+clear();
+[
+  ( log("lhs before obj a"), obj )[ (log("lhs before name a"), "a") ]
+] = logger(["A"]);
+assertEq(logs.join(","),
+         [
+           "rhs get @@iterator",
+           "rhs call @@iterator",
+
+           "lhs before obj a",
+           "lhs before name a",
+           "rhs get @@iterator()::next",
+           "rhs call @@iterator()::next",
+           "rhs get @@iterator()::next()::done",
+           "rhs get @@iterator()::next()::value",
+           "lhs set a",
+         ].join(","));
+assertEq(storage.values.a, "A");
+
+// Array rest.
+
+clear();
+[
+  ...( log("lhs before obj a"), obj ).a
+] = logger(["A", "B", "C"]);
+assertEq(logs.join(","),
+         [
+           "rhs get @@iterator",
+           "rhs call @@iterator",
+
+           "lhs before obj a",
+           "rhs get @@iterator()::next",
+           "rhs call @@iterator()::next",
+           "rhs get @@iterator()::next()::done",
+           "rhs get @@iterator()::next()::value",
+           "rhs get @@iterator()::next",
+           "rhs call @@iterator()::next",
+           "rhs get @@iterator()::next()::done",
+           "rhs get @@iterator()::next()::value",
+           "rhs get @@iterator()::next",
+           "rhs call @@iterator()::next",
+           "rhs get @@iterator()::next()::done",
+           "rhs get @@iterator()::next()::value",
+           "rhs get @@iterator()::next",
+           "rhs call @@iterator()::next",
+           "rhs get @@iterator()::next()::done",
+           "lhs set a",
+         ].join(","));
+assertEq(storage.values.a.join(","), "A,B,C");
+
+clear();
+[
+  ...( log("lhs before obj a"), obj )[ (log("lhs before name a"), "a") ]
+] = logger(["A", "B", "C"]);;
+assertEq(logs.join(","),
+         [
+           "rhs get @@iterator",
+           "rhs call @@iterator",
+
+           "lhs before obj a",
+           "lhs before name a",
+           "rhs get @@iterator()::next",
+           "rhs call @@iterator()::next",
+           "rhs get @@iterator()::next()::done",
+           "rhs get @@iterator()::next()::value",
+           "rhs get @@iterator()::next",
+           "rhs call @@iterator()::next",
+           "rhs get @@iterator()::next()::done",
+           "rhs get @@iterator()::next()::value",
+           "rhs get @@iterator()::next",
+           "rhs call @@iterator()::next",
+           "rhs get @@iterator()::next()::done",
+           "rhs get @@iterator()::next()::value",
+           "rhs get @@iterator()::next",
+           "rhs call @@iterator()::next",
+           "rhs get @@iterator()::next()::done",
+           "lhs set a",
+         ].join(","));
+assertEq(storage.values.a.join(","), "A,B,C");
+
+// Array combined.
+
+clear();
+[
+  ( log("lhs before obj a"), obj ).a,
+  ( log("lhs before obj b"), obj )[ (log("lhs before name b"), "b") ],
+  ...( log("lhs before obj c"), obj )[ (log("lhs before name c"), "c") ]
+] = logger(["A", "B", "C"]);
+assertEq(logs.join(","),
+         [
+           "rhs get @@iterator",
+           "rhs call @@iterator",
+
+           "lhs before obj a",
+           "rhs get @@iterator()::next",
+           "rhs call @@iterator()::next",
+           "rhs get @@iterator()::next()::done",
+           "rhs get @@iterator()::next()::value",
+           "lhs set a",
+
+           "lhs before obj b",
+           "lhs before name b",
+           "rhs get @@iterator()::next",
+           "rhs call @@iterator()::next",
+           "rhs get @@iterator()::next()::done",
+           "rhs get @@iterator()::next()::value",
+           "lhs set b",
+
+           "lhs before obj c",
+           "lhs before name c",
+           "rhs get @@iterator()::next",
+           "rhs call @@iterator()::next",
+           "rhs get @@iterator()::next()::done",
+           "rhs get @@iterator()::next()::value",
+           "rhs get @@iterator()::next",
+           "rhs call @@iterator()::next",
+           "rhs get @@iterator()::next()::done",
+           "lhs set c",
+         ].join(","));
+assertEq(storage.values.a, "A");
+assertEq(storage.values.b, "B");
+assertEq(storage.values.c.join(","), "C");
+
+// Object.
+
+clear();
+({
+  a: ( log("lhs before obj a"), obj ).a
+} = logger({a: "A"}));
+assertEq(logs.join(","),
+         [
+           "lhs before obj a",
+           "rhs get a",
+           "lhs set a",
+         ].join(","));
+assertEq(storage.values.a, "A");
+
+clear();
+({
+  a: ( log("lhs before obj a"), obj )[ (log("lhs before name a"), "a") ]
+} = logger({a: "A"}));
+assertEq(logs.join(","),
+         [
+           "lhs before obj a",
+           "lhs before name a",
+           "rhs get a",
+           "lhs set a",
+         ].join(","));
+assertEq(storage.values.a, "A");
+
+// Object combined.
+
+clear();
+({
+  a: ( log("lhs before obj a"), obj ).a,
+  b: ( log("lhs before obj b"), obj )[ (log("lhs before name b"), "b") ]
+} = logger({a: "A", b: "B"}));
+assertEq(logs.join(","),
+         [
+           "lhs before obj a",
+           "rhs get a",
+           "lhs set a",
+
+           "lhs before obj b",
+           "lhs before name b",
+           "rhs get b",
+           "lhs set b",
+         ].join(","));
+assertEq(storage.values.a, "A");
+assertEq(storage.values.b, "B");
+
+// == Nested ==
+
+// Array -> Array
+
+clear();
+[
+  [
+    ( log("lhs before obj a"), obj )[ (log("lhs before name a"), "a") ],
+    ...( log("lhs before obj b"), obj )[ (log("lhs before name b"), "b") ]
+  ]
+] = logger([["A", "B"]]);
+assertEq(logs.join(","),
+         [
+           "rhs get @@iterator",
+           "rhs call @@iterator",
+
+           "rhs get @@iterator()::next",
+           "rhs call @@iterator()::next",
+           "rhs get @@iterator()::next()::done",
+           "rhs get @@iterator()::next()::value",
+           "rhs get @@iterator()::next()::value::@@iterator",
+           "rhs call @@iterator()::next()::value::@@iterator",
+
+           "lhs before obj a",
+           "lhs before name a",
+           "rhs get @@iterator()::next()::value::@@iterator()::next",
+           "rhs call @@iterator()::next()::value::@@iterator()::next",
+           "rhs get @@iterator()::next()::value::@@iterator()::next()::done",
+           "rhs get @@iterator()::next()::value::@@iterator()::next()::value",
+           "lhs set a",
+
+           "lhs before obj b",
+           "lhs before name b",
+           "rhs get @@iterator()::next()::value::@@iterator()::next",
+           "rhs call @@iterator()::next()::value::@@iterator()::next",
+           "rhs get @@iterator()::next()::value::@@iterator()::next()::done",
+           "rhs get @@iterator()::next()::value::@@iterator()::next()::value",
+           "rhs get @@iterator()::next()::value::@@iterator()::next",
+           "rhs call @@iterator()::next()::value::@@iterator()::next",
+           "rhs get @@iterator()::next()::value::@@iterator()::next()::done",
+           "lhs set b",
+         ].join(","));
+assertEq(storage.values.a, "A");
+assertEq(storage.values.b.length, 1);
+assertEq(storage.values.b[0], "B");
+
+// Array rest -> Array
+
+clear();
+[
+  ...[
+    ( log("lhs before obj a"), obj )[ (log("lhs before name a"), "a") ],
+    ...( log("lhs before obj b"), obj )[ (log("lhs before name b"), "b") ]
+  ]
+] = logger(["A", "B"]);
+assertEq(logs.join(","),
+         [
+           "rhs get @@iterator",
+           "rhs call @@iterator",
+
+           "rhs get @@iterator()::next",
+           "rhs call @@iterator()::next",
+           "rhs get @@iterator()::next()::done",
+           "rhs get @@iterator()::next()::value",
+           "rhs get @@iterator()::next",
+           "rhs call @@iterator()::next",
+           "rhs get @@iterator()::next()::done",
+           "rhs get @@iterator()::next()::value",
+           "rhs get @@iterator()::next",
+           "rhs call @@iterator()::next",
+           "rhs get @@iterator()::next()::done",
+
+           "lhs before obj a",
+           "lhs before name a",
+           "lhs set a",
+
+           "lhs before obj b",
+           "lhs before name b",
+           "lhs set b",
+         ].join(","));
+assertEq(storage.values.a, "A");
+assertEq(storage.values.b.join(","), "B");
+
+// Array -> Object
+clear();
+[
+  {
+    a: ( log("lhs before obj a"), obj )[ (log("lhs before name a"), "a") ]
+  }
+] = logger([{a: "A"}]);
+assertEq(logs.join(","),
+         [
+           "rhs get @@iterator",
+           "rhs call @@iterator",
+
+           "rhs get @@iterator()::next",
+           "rhs call @@iterator()::next",
+           "rhs get @@iterator()::next()::done",
+           "rhs get @@iterator()::next()::value",
+
+           "lhs before obj a",
+           "lhs before name a",
+           "rhs get @@iterator()::next()::value::a",
+           "lhs set a",
+         ].join(","));
+assertEq(storage.values.a, "A");
+
+// Array rest -> Object
+clear();
+[
+  ...{
+    0: ( log("lhs before obj 0"), obj )[ (log("lhs before name 0"), "0") ],
+    1: ( log("lhs before obj 1"), obj )[ (log("lhs before name 1"), "1") ],
+    length: ( log("lhs before obj length"), obj )[ (log("lhs before name length"), "length") ],
+  }
+] = logger(["A", "B"]);
+assertEq(logs.join(","),
+         [
+           "rhs get @@iterator",
+           "rhs call @@iterator",
+
+           "rhs get @@iterator()::next",
+           "rhs call @@iterator()::next",
+           "rhs get @@iterator()::next()::done",
+           "rhs get @@iterator()::next()::value",
+           "rhs get @@iterator()::next",
+           "rhs call @@iterator()::next",
+           "rhs get @@iterator()::next()::done",
+           "rhs get @@iterator()::next()::value",
+           "rhs get @@iterator()::next",
+           "rhs call @@iterator()::next",
+           "rhs get @@iterator()::next()::done",
+
+           "lhs before obj 0",
+           "lhs before name 0",
+           "lhs set 0",
+
+           "lhs before obj 1",
+           "lhs before name 1",
+           "lhs set 1",
+
+           "lhs before obj length",
+           "lhs before name length",
+           "lhs set length",
+         ].join(","));
+assertEq(storage.values["0"], "A");
+assertEq(storage.values["1"], "B");
+assertEq(storage.values.length, 2);
+
+// Object -> Array
+clear();
+({
+  a: [
+    ( log("lhs before obj b"), obj )[ (log("lhs before name b"), "b") ]
+  ]
+} = logger({a: ["B"]}));
+assertEq(logs.join(","),
+         [
+           "rhs get a",
+           "rhs get a::@@iterator",
+           "rhs call a::@@iterator",
+
+           "lhs before obj b",
+           "lhs before name b",
+           "rhs get a::@@iterator()::next",
+           "rhs call a::@@iterator()::next",
+           "rhs get a::@@iterator()::next()::done",
+           "rhs get a::@@iterator()::next()::value",
+           "lhs set b",
+         ].join(","));
+assertEq(storage.values.b, "B");
+
+// Object -> Object
+clear();
+({
+  a: {
+    b: ( log("lhs before obj b"), obj )[ (log("lhs before name b"), "b") ]
+  }
+} = logger({a: {b: "B"}}));
+assertEq(logs.join(","),
+         [
+           "rhs get a",
+           "lhs before obj b",
+           "lhs before name b",
+           "rhs get a::b",
+           "lhs set b",
+         ].join(","));
+assertEq(storage.values.b, "B");
+
+// All combined
+
+clear();
+[
+  ( log("lhs before obj a"), obj )[ (log("lhs before name a"), "a") ],
+  [
+    ( log("lhs before obj b"), obj )[ (log("lhs before name b"), "b") ],
+    {
+      c: ( log("lhs before obj c"), obj )[ (log("lhs before name c"), "c") ],
+      d: {
+        e: ( log("lhs before obj e"), obj )[ (log("lhs before name e"), "e") ],
+        f: [
+          ( log("lhs before obj g"), obj )[ (log("lhs before name g"), "g") ]
+        ]
+      }
+    }
+  ],
+  {
+    h: ( log("lhs before obj h"), obj )[ (log("lhs before name h"), "h") ],
+    i: [
+      ( log("lhs before obj j"), obj )[ (log("lhs before name j"), "j") ],
+      {
+        k: [
+          ( log("lhs before obj l"), obj )[ (log("lhs before name l"), "l") ]
+        ]
+      }
+    ]
+  },
+  ...[
+    ( log("lhs before obj m"), obj )[ (log("lhs before name m"), "m") ],
+    [
+      ( log("lhs before obj n"), obj )[ (log("lhs before name n"), "n") ],
+      {
+        o: ( log("lhs before obj o"), obj )[ (log("lhs before name o"), "o") ],
+        p: {
+          q: ( log("lhs before obj q"), obj )[ (log("lhs before name q"), "q") ],
+          r: [
+            ( log("lhs before obj s"), obj )[ (log("lhs before name s"), "s") ]
+          ]
+        }
+      }
+    ],
+    ...{
+      0: ( log("lhs before obj t"), obj )[ (log("lhs before name t"), "t") ],
+      1: [
+        ( log("lhs before obj u"), obj )[ (log("lhs before name u"), "u") ],
+        {
+          v: ( log("lhs before obj v"), obj )[ (log("lhs before name v"), "v") ],
+          w: {
+            x: ( log("lhs before obj x"), obj )[ (log("lhs before name x"), "x") ],
+            y: [
+              ( log("lhs before obj z"), obj )[ (log("lhs before name z"), "z") ]
+            ]
+          }
+        }
+      ],
+      length: ( log("lhs before obj length"), obj )[ (log("lhs before name length"), "length") ],
+    }
+  ]
+] = logger(["A",
+            ["B", {c: "C", d: {e: "E", f: ["G"]}}],
+            {h: "H", i: ["J", {k: ["L"]}]},
+            "M",
+            ["N", {o: "O", p: {q: "Q", r: ["S"]}}],
+            "T", ["U", {v: "V", w: {x: "X", y: ["Z"]}}]]);
+assertEq(logs.join(","),
+         [
+           "rhs get @@iterator",
+           "rhs call @@iterator",
+
+           "lhs before obj a",
+           "lhs before name a",
+           "rhs get @@iterator()::next",
+           "rhs call @@iterator()::next",
+           "rhs get @@iterator()::next()::done",
+           "rhs get @@iterator()::next()::value",
+           "lhs set a",
+
+           "rhs get @@iterator()::next",
+           "rhs call @@iterator()::next",
+           "rhs get @@iterator()::next()::done",
+           "rhs get @@iterator()::next()::value",
+           "rhs get @@iterator()::next()::value::@@iterator",
+           "rhs call @@iterator()::next()::value::@@iterator",
+
+           "lhs before obj b",
+           "lhs before name b",
+           "rhs get @@iterator()::next()::value::@@iterator()::next",
+           "rhs call @@iterator()::next()::value::@@iterator()::next",
+           "rhs get @@iterator()::next()::value::@@iterator()::next()::done",
+           "rhs get @@iterator()::next()::value::@@iterator()::next()::value",
+           "lhs set b",
+
+           "rhs get @@iterator()::next()::value::@@iterator()::next",
+           "rhs call @@iterator()::next()::value::@@iterator()::next",
+           "rhs get @@iterator()::next()::value::@@iterator()::next()::done",
+           "rhs get @@iterator()::next()::value::@@iterator()::next()::value",
+
+           "lhs before obj c",
+           "lhs before name c",
+           "rhs get @@iterator()::next()::value::@@iterator()::next()::value::c",
+           "lhs set c",
+
+           "rhs get @@iterator()::next()::value::@@iterator()::next()::value::d",
+
+           "lhs before obj e",
+           "lhs before name e",
+           "rhs get @@iterator()::next()::value::@@iterator()::next()::value::d::e",
+           "lhs set e",
+
+           "rhs get @@iterator()::next()::value::@@iterator()::next()::value::d::f",
+           "rhs get @@iterator()::next()::value::@@iterator()::next()::value::d::f::@@iterator",
+           "rhs call @@iterator()::next()::value::@@iterator()::next()::value::d::f::@@iterator",
+
+           "lhs before obj g",
+           "lhs before name g",
+           "rhs get @@iterator()::next()::value::@@iterator()::next()::value::d::f::@@iterator()::next",
+           "rhs call @@iterator()::next()::value::@@iterator()::next()::value::d::f::@@iterator()::next",
+           "rhs get @@iterator()::next()::value::@@iterator()::next()::value::d::f::@@iterator()::next()::done",
+           "rhs get @@iterator()::next()::value::@@iterator()::next()::value::d::f::@@iterator()::next()::value",
+           "lhs set g",
+
+           "rhs get @@iterator()::next",
+           "rhs call @@iterator()::next",
+           "rhs get @@iterator()::next()::done",
+           "rhs get @@iterator()::next()::value",
+
+           "lhs before obj h",
+           "lhs before name h",
+           "rhs get @@iterator()::next()::value::h",
+           "lhs set h",
+
+           "rhs get @@iterator()::next()::value::i",
+           "rhs get @@iterator()::next()::value::i::@@iterator",
+           "rhs call @@iterator()::next()::value::i::@@iterator",
+
+           "lhs before obj j",
+           "lhs before name j",
+           "rhs get @@iterator()::next()::value::i::@@iterator()::next",
+           "rhs call @@iterator()::next()::value::i::@@iterator()::next",
+           "rhs get @@iterator()::next()::value::i::@@iterator()::next()::done",
+           "rhs get @@iterator()::next()::value::i::@@iterator()::next()::value",
+           "lhs set j",
+
+           "rhs get @@iterator()::next()::value::i::@@iterator()::next",
+           "rhs call @@iterator()::next()::value::i::@@iterator()::next",
+           "rhs get @@iterator()::next()::value::i::@@iterator()::next()::done",
+           "rhs get @@iterator()::next()::value::i::@@iterator()::next()::value",
+
+           "rhs get @@iterator()::next()::value::i::@@iterator()::next()::value::k",
+           "rhs get @@iterator()::next()::value::i::@@iterator()::next()::value::k::@@iterator",
+           "rhs call @@iterator()::next()::value::i::@@iterator()::next()::value::k::@@iterator",
+
+           "lhs before obj l",
+           "lhs before name l",
+           "rhs get @@iterator()::next()::value::i::@@iterator()::next()::value::k::@@iterator()::next",
+           "rhs call @@iterator()::next()::value::i::@@iterator()::next()::value::k::@@iterator()::next",
+           "rhs get @@iterator()::next()::value::i::@@iterator()::next()::value::k::@@iterator()::next()::done",
+           "rhs get @@iterator()::next()::value::i::@@iterator()::next()::value::k::@@iterator()::next()::value",
+           "lhs set l",
+
+           "rhs get @@iterator()::next",
+           "rhs call @@iterator()::next",
+           "rhs get @@iterator()::next()::done",
+           "rhs get @@iterator()::next()::value",
+           "rhs get @@iterator()::next",
+           "rhs call @@iterator()::next",
+           "rhs get @@iterator()::next()::done",
+           "rhs get @@iterator()::next()::value",
+           "rhs get @@iterator()::next",
+           "rhs call @@iterator()::next",
+           "rhs get @@iterator()::next()::done",
+           "rhs get @@iterator()::next()::value",
+           "rhs get @@iterator()::next",
+           "rhs call @@iterator()::next",
+           "rhs get @@iterator()::next()::done",
+           "rhs get @@iterator()::next()::value",
+           "rhs get @@iterator()::next",
+           "rhs call @@iterator()::next",
+           "rhs get @@iterator()::next()::done",
+
+           "lhs before obj m",
+           "lhs before name m",
+           "lhs set m",
+
+           "rhs get @@iterator()::next()::value::@@iterator",
+           "rhs call @@iterator()::next()::value::@@iterator",
+
+           "lhs before obj n",
+           "lhs before name n",
+           "rhs get @@iterator()::next()::value::@@iterator()::next",
+           "rhs call @@iterator()::next()::value::@@iterator()::next",
+           "rhs get @@iterator()::next()::value::@@iterator()::next()::done",
+           "rhs get @@iterator()::next()::value::@@iterator()::next()::value",
+           "lhs set n",
+
+           "rhs get @@iterator()::next()::value::@@iterator()::next",
+           "rhs call @@iterator()::next()::value::@@iterator()::next",
+           "rhs get @@iterator()::next()::value::@@iterator()::next()::done",
+           "rhs get @@iterator()::next()::value::@@iterator()::next()::value",
+
+           "lhs before obj o",
+           "lhs before name o",
+           "rhs get @@iterator()::next()::value::@@iterator()::next()::value::o",
+           "lhs set o",
+
+           "rhs get @@iterator()::next()::value::@@iterator()::next()::value::p",
+
+           "lhs before obj q",
+           "lhs before name q",
+           "rhs get @@iterator()::next()::value::@@iterator()::next()::value::p::q",
+           "lhs set q",
+
+           "rhs get @@iterator()::next()::value::@@iterator()::next()::value::p::r",
+           "rhs get @@iterator()::next()::value::@@iterator()::next()::value::p::r::@@iterator",
+           "rhs call @@iterator()::next()::value::@@iterator()::next()::value::p::r::@@iterator",
+
+           "lhs before obj s",
+           "lhs before name s",
+           "rhs get @@iterator()::next()::value::@@iterator()::next()::value::p::r::@@iterator()::next",
+           "rhs call @@iterator()::next()::value::@@iterator()::next()::value::p::r::@@iterator()::next",
+           "rhs get @@iterator()::next()::value::@@iterator()::next()::value::p::r::@@iterator()::next()::done",
+           "rhs get @@iterator()::next()::value::@@iterator()::next()::value::p::r::@@iterator()::next()::value",
+           "lhs set s",
+
+           "lhs before obj t",
+           "lhs before name t",
+           "lhs set t",
+
+           "rhs get @@iterator()::next()::value::@@iterator",
+           "rhs call @@iterator()::next()::value::@@iterator",
+
+           "lhs before obj u",
+           "lhs before name u",
+           "rhs get @@iterator()::next()::value::@@iterator()::next",
+           "rhs call @@iterator()::next()::value::@@iterator()::next",
+           "rhs get @@iterator()::next()::value::@@iterator()::next()::done",
+           "rhs get @@iterator()::next()::value::@@iterator()::next()::value",
+           "lhs set u",
+
+           "rhs get @@iterator()::next()::value::@@iterator()::next",
+           "rhs call @@iterator()::next()::value::@@iterator()::next",
+           "rhs get @@iterator()::next()::value::@@iterator()::next()::done",
+           "rhs get @@iterator()::next()::value::@@iterator()::next()::value",
+
+           "lhs before obj v",
+           "lhs before name v",
+           "rhs get @@iterator()::next()::value::@@iterator()::next()::value::v",
+           "lhs set v",
+
+           "rhs get @@iterator()::next()::value::@@iterator()::next()::value::w",
+
+           "lhs before obj x",
+           "lhs before name x",
+           "rhs get @@iterator()::next()::value::@@iterator()::next()::value::w::x",
+           "lhs set x",
+
+           "rhs get @@iterator()::next()::value::@@iterator()::next()::value::w::y",
+           "rhs get @@iterator()::next()::value::@@iterator()::next()::value::w::y::@@iterator",
+           "rhs call @@iterator()::next()::value::@@iterator()::next()::value::w::y::@@iterator",
+
+           "lhs before obj z",
+           "lhs before name z",
+           "rhs get @@iterator()::next()::value::@@iterator()::next()::value::w::y::@@iterator()::next",
+           "rhs call @@iterator()::next()::value::@@iterator()::next()::value::w::y::@@iterator()::next",
+           "rhs get @@iterator()::next()::value::@@iterator()::next()::value::w::y::@@iterator()::next()::done",
+           "rhs get @@iterator()::next()::value::@@iterator()::next()::value::w::y::@@iterator()::next()::value",
+           "lhs set z",
+
+           "lhs before obj length",
+           "lhs before name length",
+           "lhs set length",
+         ].join(","));
+assertEq(storage.values.a, "A");
+assertEq(storage.values.b, "B");
+assertEq(storage.values.c, "C");
+assertEq(storage.values.e, "E");
+assertEq(storage.values.g, "G");
+assertEq(storage.values.h, "H");
+assertEq(storage.values.j, "J");
+assertEq(storage.values.l, "L");
+assertEq(storage.values.m, "M");
+assertEq(storage.values.n, "N");
+assertEq(storage.values.o, "O");
+assertEq(storage.values.q, "Q");
+assertEq(storage.values.s, "S");
+assertEq(storage.values.t, "T");
+assertEq(storage.values.u, "U");
+assertEq(storage.values.v, "V");
+assertEq(storage.values.x, "X");
+assertEq(storage.values.z, "Z");
+assertEq(storage.values.length, 2);
+
+if (typeof reportCompare === "function")
+    reportCompare(true, true);
diff --git a/js/src/tests/ecma_6/Error/constructor-proto.js b/js/src/tests/ecma_6/Error/constructor-proto.js
new file mode 100644
index 0000000000..4ddc6025e8
--- /dev/null
+++ b/js/src/tests/ecma_6/Error/constructor-proto.js
@@ -0,0 +1,17 @@
+const nativeErrors = [
+    InternalError,
+    EvalError,
+    RangeError,
+    ReferenceError,
+    SyntaxError,
+    TypeError,
+    URIError
+];
+
+assertEq(Reflect.getPrototypeOf(Error), Function.prototype)
+
+for (const error of nativeErrors)
+    assertEq(Reflect.getPrototypeOf(error), Error);
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0);
diff --git a/js/src/tests/ecma_6/Error/prototype-properties.js b/js/src/tests/ecma_6/Error/prototype-properties.js
new file mode 100644
index 0000000000..c66caf2bcb
--- /dev/null
+++ b/js/src/tests/ecma_6/Error/prototype-properties.js
@@ -0,0 +1,24 @@
+const nativeErrors = [
+    InternalError,
+    EvalError,
+    RangeError,
+    ReferenceError,
+    SyntaxError,
+    TypeError,
+    URIError
+];
+
+
+assertEq(Reflect.ownKeys(Error.prototype).toString(), "toSource,toString,message,name,stack,constructor");
+assertEq(Error.prototype.name, "Error");
+assertEq(Error.prototype.message, "");
+
+for (const error of nativeErrors) {
+    assertEq(Reflect.ownKeys(error.prototype).toString(), "message,name,constructor");
+    assertEq(error.prototype.name, error.name);
+    assertEq(error.prototype.message, "");
+    assertEq(error.prototype.constructor, error);
+}
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0);
diff --git a/js/src/tests/ecma_6/Error/prototype.js b/js/src/tests/ecma_6/Error/prototype.js
new file mode 100644
index 0000000000..b22a8e084b
--- /dev/null
+++ b/js/src/tests/ecma_6/Error/prototype.js
@@ -0,0 +1,18 @@
+const nativeErrors = [
+    InternalError,
+    EvalError,
+    RangeError,
+    ReferenceError,
+    SyntaxError,
+    TypeError,
+    URIError
+];
+
+assertEq(Reflect.getPrototypeOf(Error.prototype), Object.prototype)
+
+for (const error of nativeErrors) {
+    assertEq(Reflect.getPrototypeOf(error.prototype), Error.prototype);
+}
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0);
diff --git a/js/src/tests/ecma_6/Error/shell.js b/js/src/tests/ecma_6/Error/shell.js
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/js/src/tests/ecma_6/Error/shell.js
diff --git a/js/src/tests/ecma_6/Function/function-name-assignment.js b/js/src/tests/ecma_6/Function/function-name-assignment.js
new file mode 100644
index 0000000000..5e4d1c004f
--- /dev/null
+++ b/js/src/tests/ecma_6/Function/function-name-assignment.js
@@ -0,0 +1,139 @@
+var BUGNUMBER = 883377;
+var summary = "Anonymous function name should be set based on assignment";
+
+print(BUGNUMBER + ": " + summary);
+
+var fooSymbol = Symbol("foo");
+var emptySymbol = Symbol("");
+var undefSymbol = Symbol();
+var globalVar;
+
+var exprs = [
+    ["function() {}", false],
+    ["function named() {}", true],
+    ["function*() {}", false],
+    ["function* named() {}", true],
+    ["async function() {}", false],
+    ["async function named() {}", true],
+    ["() => {}", false],
+    ["async () => {}", false],
+    ["class {}", false],
+    ["class named {}", true],
+];
+
+function testAssignmentExpression(expr, named) {
+    eval(`
+    var assignment;
+    assignment = ${expr};
+    assertEq(assignment.name, named ? "named" : "assignment");
+
+    globalVar = ${expr};
+    assertEq(globalVar.name, named ? "named" : "globalVar");
+
+    var obj = { dynamic: null };
+    with (obj) {
+        dynamic = ${expr};
+    }
+    assertEq(obj.dynamic.name, named ? "named" : "dynamic");
+
+    (function namedLambda(param1, param2) {
+        var assignedToNamedLambda;
+        assignedToNamedLambda = namedLambda = ${expr};
+        assertEq(namedLambda.name, "namedLambda");
+        assertEq(assignedToNamedLambda.name, named ? "named" : "namedLambda");
+
+        param1 = ${expr};
+        assertEq(param1.name, named ? "named" : "param1");
+
+        {
+            let param1 = ${expr};
+            assertEq(param1.name, named ? "named" : "param1");
+
+            param2 = ${expr};
+            assertEq(param2.name, named ? "named" : "param2");
+        }
+    })();
+
+    {
+        let nextedLexical1, nextedLexical2;
+        {
+            let nextedLexical1 = ${expr};
+            assertEq(nextedLexical1.name, named ? "named" : "nextedLexical1");
+
+            nextedLexical2 = ${expr};
+            assertEq(nextedLexical2.name, named ? "named" : "nextedLexical2");
+        }
+    }
+    `);
+
+    // Not applicable cases: not IsIdentifierRef.
+    eval(`
+    var inParen;
+    (inParen) = ${expr};
+    assertEq(inParen.name, named ? "named" : "");
+    `);
+
+    // Not applicable cases: not direct RHS.
+    if (!expr.includes("=>")) {
+        eval(`
+        var a = true && ${expr};
+        assertEq(a.name, named ? "named" : "");
+        `);
+    } else {
+        // Arrow function cannot be RHS of &&.
+        eval(`
+        var a = true && (${expr});
+        assertEq(a.name, named ? "named" : "");
+        `);
+    }
+
+    // Not applicable cases: property.
+    eval(`
+    var obj = {};
+
+    obj.prop = ${expr};
+    assertEq(obj.prop.name, named ? "named" : "");
+
+    obj["literal"] = ${expr};
+    assertEq(obj["literal"].name, named ? "named" : "");
+    `);
+
+    // Not applicable cases: assigned again.
+    eval(`
+    var tmp = [${expr}];
+    assertEq(tmp[0].name, named ? "named" : "");
+
+    var assignment;
+    assignment = tmp[0];
+    assertEq(assignment.name, named ? "named" : "");
+    `);
+}
+for (var [expr, named] of exprs) {
+    testAssignmentExpression(expr, named);
+}
+
+function testVariableDeclaration(expr, named) {
+    eval(`
+    var varDecl = ${expr};
+    assertEq(varDecl.name, named ? "named" : "varDecl");
+    `);
+}
+for (var [expr, named] of exprs) {
+    testVariableDeclaration(expr, named);
+}
+
+function testLexicalBinding(expr, named) {
+    eval(`
+    let lexical = ${expr};
+    assertEq(lexical.name, named ? "named" : "lexical");
+
+    const constLexical = ${expr};
+    assertEq(constLexical.name, named ? "named" : "constLexical");
+    `);
+}
+for (var [expr, named] of exprs) {
+    testLexicalBinding(expr, named);
+}
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0);
diff --git a/js/src/tests/ecma_6/Function/function-name-binding.js b/js/src/tests/ecma_6/Function/function-name-binding.js
new file mode 100644
index 0000000000..bdd6c131c0
--- /dev/null
+++ b/js/src/tests/ecma_6/Function/function-name-binding.js
@@ -0,0 +1,54 @@
+var BUGNUMBER = 883377;
+var summary = "Anonymous function name should be set based on binding pattern";
+
+print(BUGNUMBER + ": " + summary);
+
+var exprs = [
+    ["function() {}", false],
+    ["function named() {}", true],
+    ["function*() {}", false],
+    ["function* named() {}", true],
+    ["async function() {}", false],
+    ["async function named() {}", true],
+    ["() => {}", false],
+    ["async () => {}", false],
+    ["class {}", false],
+    ["class named {}", true],
+];
+
+function testAssignmentProperty(expr, named) {
+    var f = eval(`(function({ prop1 = ${expr} }) { return prop1; })`);
+    assertEq(f({}).name, named ? "named" : "prop1");
+
+    eval(`
+    var { prop1 = ${expr} } = {};
+    assertEq(prop1.name, named ? "named" : "prop1");
+    `);
+}
+for (var [expr, named] of exprs) {
+    testAssignmentProperty(expr, named);
+}
+
+function testAssignmentElement(expr, named) {
+    var f = eval(`(function([elem1 = ${expr}]) { return elem1; })`);
+    assertEq(f([]).name, named ? "named" : "elem1");
+
+    eval(`
+    var [elem1 = ${expr}] = [];
+    assertEq(elem1.name, named ? "named" : "elem1");
+    `);
+}
+for (var [expr, named] of exprs) {
+    testAssignmentElement(expr, named);
+}
+
+function testSingleNameBinding(expr, named) {
+    var f = eval(`(function(param1 = ${expr}) { return param1; })`);
+    assertEq(f().name, named ? "named" : "param1");
+}
+for (var [expr, named] of exprs) {
+    testSingleNameBinding(expr, named);
+}
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0);
diff --git a/js/src/tests/ecma_6/Function/function-name-class.js b/js/src/tests/ecma_6/Function/function-name-class.js
new file mode 100644
index 0000000000..edde690556
--- /dev/null
+++ b/js/src/tests/ecma_6/Function/function-name-class.js
@@ -0,0 +1,32 @@
+var BUGNUMBER = 883377;
+var summary = "Anonymous class with name method shouldn't be affected by assignment";
+
+print(BUGNUMBER + ": " + summary);
+
+var classWithStaticNameMethod = class { static name() {} };
+assertEq(typeof classWithStaticNameMethod.name, "function");
+
+var classWithStaticNameGetter = class { static get name() { return "static name"; } };
+assertEq(typeof Object.getOwnPropertyDescriptor(classWithStaticNameGetter, "name").get, "function");
+assertEq(classWithStaticNameGetter.name, "static name");
+
+var classWithStaticNameSetter = class { static set name(v) {} };
+assertEq(typeof Object.getOwnPropertyDescriptor(classWithStaticNameSetter, "name").set, "function");
+
+var n = "NAME".toLowerCase();
+var classWithStaticNameMethodComputed = class { static [n]() {} };
+assertEq(typeof classWithStaticNameMethodComputed.name, "function");
+
+// It doesn't apply for non-static method.
+
+var classWithNameMethod = class { name() {} };
+assertEq(classWithNameMethod.name, "classWithNameMethod");
+
+var classWithNameGetter = class { get name() { return "name"; } };
+assertEq(classWithNameGetter.name, "classWithNameGetter");
+
+var classWithNameSetter = class { set name(v) {} };
+assertEq(classWithNameSetter.name, "classWithNameSetter");
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0);
diff --git a/js/src/tests/ecma_6/Function/function-name-for.js b/js/src/tests/ecma_6/Function/function-name-for.js
new file mode 100644
index 0000000000..2f04a5fa8d
--- /dev/null
+++ b/js/src/tests/ecma_6/Function/function-name-for.js
@@ -0,0 +1,31 @@
+var BUGNUMBER = 883377;
+var summary = "Anonymous function name should be set based on for-in initializer";
+
+print(BUGNUMBER + ": " + summary);
+
+var exprs = [
+    ["function() {}", false],
+    ["function named() {}", true],
+    ["function*() {}", false],
+    ["function* named() {}", true],
+    ["async function() {}", false],
+    ["async function named() {}", true],
+    ["() => {}", false],
+    ["async () => {}", false],
+    ["class {}", false],
+    ["class named {}", true],
+];
+
+function testForInHead(expr, named) {
+    eval(`
+    for (var forInHead = ${expr} in {}) {
+    }
+    `);
+    assertEq(forInHead.name, named ? "named" : "forInHead");
+}
+for (var [expr, named] of exprs) {
+    testForInHead(expr, named);
+}
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0);
diff --git a/js/src/tests/ecma_6/Function/function-name-method.js b/js/src/tests/ecma_6/Function/function-name-method.js
new file mode 100644
index 0000000000..3b2eeee793
--- /dev/null
+++ b/js/src/tests/ecma_6/Function/function-name-method.js
@@ -0,0 +1,70 @@
+var BUGNUMBER = 883377;
+var summary = "Anonymous function name should be set based on method definition";
+
+print(BUGNUMBER + ": " + summary);
+
+var fooSymbol = Symbol("foo");
+var emptySymbol = Symbol("");
+var undefSymbol = Symbol();
+
+function testMethod(prefix, classPrefix="", prototype=false) {
+    var param = (prefix == "set" || prefix == "static set") ? "v" : "";
+    var sep = classPrefix ? "" : ",";
+    var objOrClass = eval(`(${classPrefix}{
+        ${prefix} prop(${param}) {} ${sep}
+        ${prefix} "literal"(${param}) {} ${sep}
+        ${prefix} ""(${param}) {} ${sep}
+        ${prefix} 5(${param}) {} ${sep}
+        ${prefix} [Symbol.iterator](${param}) {} ${sep}
+        ${prefix} [fooSymbol](${param}) {} ${sep}
+        ${prefix} [emptySymbol](${param}) {} ${sep}
+        ${prefix} [undefSymbol](${param}) {} ${sep}
+        ${prefix} [/a/](${param}) {} ${sep}
+    })`);
+
+    var target = prototype ? objOrClass.prototype : objOrClass;
+
+    function testOne(methodName, expectedName) {
+        var f;
+        if (prefix == "get" || prefix == "static get") {
+            f = Object.getOwnPropertyDescriptor(target, methodName).get;
+            expectedName = "get " + expectedName;
+        } else if (prefix == "set" || prefix == "static set") {
+            f = Object.getOwnPropertyDescriptor(target, methodName).set;
+            expectedName = "set " + expectedName;
+        } else {
+            f = Object.getOwnPropertyDescriptor(target, methodName).value;
+        }
+
+        assertEq(f.name, expectedName);
+    }
+    testOne("prop", "prop");
+    testOne("literal", "literal");
+    testOne("", "");
+    testOne(5, "5");
+    testOne(Symbol.iterator, "[Symbol.iterator]");
+    testOne(fooSymbol, "[foo]");
+    testOne(emptySymbol, "[]");
+    testOne(undefSymbol, "");
+    testOne(/a/, "/a/");
+}
+testMethod("");
+testMethod("*");
+testMethod("async");
+testMethod("get");
+testMethod("set");
+
+testMethod("", "class", true);
+testMethod("*", "class", true);
+testMethod("async", "class", true);
+testMethod("get", "class", true);
+testMethod("set", "class", true);
+
+testMethod("static", "class");
+testMethod("static *", "class");
+testMethod("static async", "class");
+testMethod("static get", "class");
+testMethod("static set", "class");
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0);
diff --git a/js/src/tests/ecma_6/Function/function-name-property.js b/js/src/tests/ecma_6/Function/function-name-property.js
new file mode 100644
index 0000000000..7ad174b10f
--- /dev/null
+++ b/js/src/tests/ecma_6/Function/function-name-property.js
@@ -0,0 +1,58 @@
+var BUGNUMBER = 883377;
+var summary = "Anonymous function name should be set based on property name";
+
+print(BUGNUMBER + ": " + summary);
+
+var fooSymbol = Symbol("foo");
+var emptySymbol = Symbol("");
+var undefSymbol = Symbol();
+
+var exprs = [
+    ["function() {}", false],
+    ["function named() {}", true],
+    ["function*() {}", false],
+    ["function* named() {}", true],
+    ["async function() {}", false],
+    ["async function named() {}", true],
+    ["() => {}", false],
+    ["async () => {}", false],
+    ["class {}", false],
+    ["class named {}", true],
+];
+
+function testPropertyDefinition(expr, named) {
+    var obj = eval(`({
+        prop: ${expr},
+        "literal": ${expr},
+        "": ${expr},
+        5: ${expr},
+        0.4: ${expr},
+        [Symbol.iterator]: ${expr},
+        [fooSymbol]: ${expr},
+        [emptySymbol]: ${expr},
+        [undefSymbol]: ${expr},
+        [/a/]: ${expr},
+    })`);
+    assertEq(obj.prop.name, named ? "named" : "prop");
+    assertEq(obj["literal"].name, named ? "named" : "literal");
+    assertEq(obj[""].name, named ? "named" : "");
+    assertEq(obj[5].name, named ? "named" : "5");
+    assertEq(obj[0.4].name, named ? "named" : "0.4");
+    assertEq(obj[Symbol.iterator].name, named ? "named" : "[Symbol.iterator]");
+    assertEq(obj[fooSymbol].name, named ? "named" : "[foo]");
+    assertEq(obj[emptySymbol].name, named ? "named" : "[]");
+    assertEq(obj[undefSymbol].name, named ? "named" : "");
+    assertEq(obj[/a/].name, named ? "named" : "/a/");
+
+    // Not applicable cases: __proto__.
+    obj = {
+        __proto__: function() {}
+    };
+    assertEq(obj.__proto__.name, "");
+}
+for (var [expr, named] of exprs) {
+    testPropertyDefinition(expr, named);
+}
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0);
diff --git a/js/src/tests/ecma_6/Function/invalid-parameter-list.js b/js/src/tests/ecma_6/Function/invalid-parameter-list.js
new file mode 100644
index 0000000000..8aae89ef15
--- /dev/null
+++ b/js/src/tests/ecma_6/Function/invalid-parameter-list.js
@@ -0,0 +1,27 @@
+// This constructor behaves like `Function` without checking
+// if the parameter list end is at the expected position.
+// We use this to make sure that the tests we use are otherwise
+// syntactically correct.
+function DumpFunction(...args) {
+    let code = "function anonymous(";
+    code += args.slice(0, -1).join(", ");
+    code += ") {\n";
+    code += args[args.length -1];
+    code += "\n}";
+    eval(code);
+}
+
+const tests = [
+    ["/*", "*/) {"],
+    ["//", ") {"],
+    ["a = `", "` ) {"],
+    [") { var x = function (", "} "],
+    ["x = function (", "}) {"]
+];
+
+for (const test of tests) {
+    DumpFunction(...test);
+    assertThrowsInstanceOf(() => new Function(...test), SyntaxError);
+}
+
+reportCompare(0, 0, 'ok');
diff --git a/js/src/tests/ecma_6/Generators/construct-newtarget.js b/js/src/tests/ecma_6/Generators/construct-newtarget.js
new file mode 100644
index 0000000000..f2087852b0
--- /dev/null
+++ b/js/src/tests/ecma_6/Generators/construct-newtarget.js
@@ -0,0 +1,79 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+const GeneratorFunction = function*(){}.constructor;
+
+
+// Test subclassing %GeneratorFunction% works correctly.
+class MyGenerator extends GeneratorFunction {}
+
+var fn = new MyGenerator();
+assertEq(fn instanceof MyGenerator, true);
+assertEq(fn instanceof GeneratorFunction, true);
+assertEq(Object.getPrototypeOf(fn), MyGenerator.prototype);
+
+fn = Reflect.construct(MyGenerator, []);
+assertEq(fn instanceof MyGenerator, true);
+assertEq(fn instanceof GeneratorFunction, true);
+assertEq(Object.getPrototypeOf(fn), MyGenerator.prototype);
+
+fn = Reflect.construct(MyGenerator, [], MyGenerator);
+assertEq(fn instanceof MyGenerator, true);
+assertEq(fn instanceof GeneratorFunction, true);
+assertEq(Object.getPrototypeOf(fn), MyGenerator.prototype);
+
+fn = Reflect.construct(MyGenerator, [], GeneratorFunction);
+assertEq(fn instanceof MyGenerator, false);
+assertEq(fn instanceof GeneratorFunction, true);
+assertEq(Object.getPrototypeOf(fn), GeneratorFunction.prototype);
+
+
+// Set a different constructor as NewTarget.
+fn = Reflect.construct(MyGenerator, [], Array);
+assertEq(fn instanceof MyGenerator, false);
+assertEq(fn instanceof GeneratorFunction, false);
+assertEq(Object.getPrototypeOf(fn), Array.prototype);
+
+fn = Reflect.construct(GeneratorFunction, [], Array);
+assertEq(fn instanceof GeneratorFunction, false);
+assertEq(Object.getPrototypeOf(fn), Array.prototype);
+
+
+// The prototype defaults to %GeneratorFunctionPrototype% if null.
+function NewTargetNullPrototype() {}
+NewTargetNullPrototype.prototype = null;
+
+fn = Reflect.construct(GeneratorFunction, [], NewTargetNullPrototype);
+assertEq(fn instanceof GeneratorFunction, true);
+assertEq(Object.getPrototypeOf(fn), GeneratorFunction.prototype);
+
+fn = Reflect.construct(MyGenerator, [], NewTargetNullPrototype);
+assertEq(fn instanceof MyGenerator, false);
+assertEq(fn instanceof GeneratorFunction, true);
+assertEq(Object.getPrototypeOf(fn), GeneratorFunction.prototype);
+
+
+// "prototype" property is retrieved exactly once.
+var trapLog = [], getLog = [];
+var ProxiedConstructor = new Proxy(GeneratorFunction, new Proxy({
+    get(target, propertyKey, receiver) {
+        getLog.push(propertyKey);
+        return Reflect.get(target, propertyKey, receiver);
+    }
+}, {
+    get(target, propertyKey, receiver) {
+        trapLog.push(propertyKey);
+        return Reflect.get(target, propertyKey, receiver);
+    }
+}));
+
+fn = Reflect.construct(GeneratorFunction, [], ProxiedConstructor);
+assertEqArray(trapLog, ["get"]);
+assertEqArray(getLog, ["prototype"]);
+assertEq(fn instanceof GeneratorFunction, true);
+assertEq(Object.getPrototypeOf(fn), GeneratorFunction.prototype);
+
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0);
diff --git a/js/src/tests/ecma_6/Generators/delegating-yield-2.js b/js/src/tests/ecma_6/Generators/delegating-yield-2.js
index 918fb33e11..34cb3f4a9f 100644
--- a/js/src/tests/ecma_6/Generators/delegating-yield-2.js
+++ b/js/src/tests/ecma_6/Generators/delegating-yield-2.js
@@ -25,8 +25,8 @@ assertThrowsValue(function () { outer.throw(42) }, 42);
 inner = g1();
 outer = delegate(inner);
 assertIteratorNext(outer, 1);
-inner.throw = function(e) { return e*2; };
-assertEq(84, outer.throw(42));
+inner.throw = function(e) { return { value: e*2 }; };
+assertEq(84, outer.throw(42).value);
 assertIteratorDone(outer, undefined);
 
 // Monkeypatching inner.next.
@@ -41,7 +41,9 @@ outer = delegate(inner);
 assertIteratorNext(outer, 1);
 delete GeneratorObjectPrototype.throw;
 var outer_throw_42 = GeneratorObjectPrototype_throw.bind(outer, 42);
-assertThrowsValue(outer_throw_42, 42);
+// yield* protocol violation: no 'throw' method
+assertThrowsInstanceOf(outer_throw_42, TypeError);
+// Now done, so just throws.
 assertThrowsValue(outer_throw_42, 42);
 
 // Monkeypunch a different throw handler.
@@ -49,11 +51,11 @@ inner = g2();
 outer = delegate(inner);
 outer_throw_42 = GeneratorObjectPrototype_throw.bind(outer, 42);
 assertIteratorNext(outer, 1);
-GeneratorObjectPrototype.throw = function(e) { return e*2; }
-assertEq(84, outer_throw_42());
-assertEq(84, outer_throw_42());
+GeneratorObjectPrototype.throw = function(e) { return { value: e*2 }; }
+assertEq(84, outer_throw_42().value);
+assertEq(84, outer_throw_42().value);
 // This continues indefinitely.
-assertEq(84, outer_throw_42());
+assertEq(84, outer_throw_42().value);
 assertIteratorDone(outer, undefined);
 
 // The same, but restoring the original pre-monkey throw.
@@ -61,8 +63,8 @@ inner = g2();
 outer = delegate(inner);
 outer_throw_42 = GeneratorObjectPrototype_throw.bind(outer, 42);
 assertIteratorNext(outer, 1);
-assertEq(84, outer_throw_42());
-assertEq(84, outer_throw_42());
+assertEq(84, outer_throw_42().value);
+assertEq(84, outer_throw_42().value);
 GeneratorObjectPrototype.throw = GeneratorObjectPrototype_throw;
 assertIteratorResult(outer_throw_42(), 42, false);
 assertIteratorDone(outer, undefined);
diff --git a/js/src/tests/ecma_6/Generators/subclass.js b/js/src/tests/ecma_6/Generators/subclass.js
new file mode 100644
index 0000000000..f93f4df4db
--- /dev/null
+++ b/js/src/tests/ecma_6/Generators/subclass.js
@@ -0,0 +1,33 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+const GeneratorFunction = function*(){}.constructor;
+
+class MyGen extends GeneratorFunction {}
+
+// MyGen inherits from %GeneratorFunction%.
+assertEq(Object.getPrototypeOf(MyGen), GeneratorFunction);
+
+// MyGen.prototype inherits from %Generator%.
+assertEq(Object.getPrototypeOf(MyGen.prototype), GeneratorFunction.prototype);
+
+var fn = new MyGen("yield* [1, 2, 3]");
+
+// fn inherits from MyGen.prototype.
+assertEq(Object.getPrototypeOf(fn), MyGen.prototype);
+
+// fn.prototype inherits from %GeneratorPrototype%.
+assertEq(Object.getPrototypeOf(fn.prototype), GeneratorFunction.prototype.prototype);
+
+// Ensure the new generator function can be executed.
+var it = fn();
+
+// it inherits from fn.prototype.
+assertEq(Object.getPrototypeOf(it), fn.prototype);
+
+// Computes the expected result.
+assertEqArray([...it], [1, 2, 3]);
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0);
diff --git a/js/src/tests/ecma_6/Generators/yield-iterator-close.js b/js/src/tests/ecma_6/Generators/yield-iterator-close.js
new file mode 100644
index 0000000000..970ad494d2
--- /dev/null
+++ b/js/src/tests/ecma_6/Generators/yield-iterator-close.js
@@ -0,0 +1,58 @@
+// Test that IteratorClose is called when a Generator is abruptly completed by
+// Generator.return.
+
+var returnCalled = 0;
+function* wrapNoThrow() {
+  let iter = {
+    [Symbol.iterator]() {
+      return this;
+    },
+    next() {
+      return { value: 10, done: false };
+    },
+    return() {
+      returnCalled++;
+      return {};
+    }
+  };
+  for (const i of iter) {
+    yield i;
+  }
+}
+
+// Breaking calls Generator.return, which causes the yield above to resume with
+// an abrupt completion of kind "return", which then calls
+// iter.return.
+for (const i of wrapNoThrow()) {
+  break;
+}
+assertEq(returnCalled, 1);
+
+function* wrapThrow() {
+  let iter = {
+    [Symbol.iterator]() {
+      return this;
+    },
+    next() {
+      return { value: 10, done: false };
+    },
+    return() {
+      throw 42;
+    }
+  };
+  for (const i of iter) {
+    yield i;
+  }
+}
+
+// Breaking calls Generator.return, which, like above, calls iter.return. If
+// iter.return throws, since the yield is resuming with an abrupt completion of
+// kind "return", the newly thrown value takes precedence over returning.
+assertThrowsValue(() => {
+  for (const i of wrapThrow()) {
+    break;
+  }
+}, 42);
+
+if (typeof reportCompare === "function")
+  reportCompare(0, 0);
diff --git a/js/src/tests/ecma_6/Generators/yield-star-iterator-close.js b/js/src/tests/ecma_6/Generators/yield-star-iterator-close.js
new file mode 100644
index 0000000000..91ad31cb64
--- /dev/null
+++ b/js/src/tests/ecma_6/Generators/yield-star-iterator-close.js
@@ -0,0 +1,153 @@
+// Tests that the "return" method on iterators is called in yield*
+// expressions.
+
+function test() {
+    var returnCalled = 0;
+    var returnCalledExpected = 0;
+    var nextCalled = 0;
+    var nextCalledExpected = 0;
+    var throwCalled = 0;
+    var throwCalledExpected = 0;
+    var iterable = {};
+    iterable[Symbol.iterator] = makeIterator({
+        next: function() {
+            nextCalled++;
+            return { done: false };
+        },
+        ret: function() {
+            returnCalled++;
+            return { done: true, value: "iter.return" };
+        }
+    });
+
+    function* y() {
+        yield* iterable;
+    }
+
+    // G.p.throw on an iterator without "throw" calls IteratorClose.
+    var g1 = y();
+    g1.next();
+    assertThrowsInstanceOf(function() {
+        g1.throw("foo");
+    }, TypeError);
+    assertEq(returnCalled, ++returnCalledExpected);
+    assertEq(nextCalled, ++nextCalledExpected);
+    g1.next();
+    assertEq(nextCalled, nextCalledExpected);
+
+    // G.p.return calls "return", and if the result.done is true, return the
+    // result.
+    var g2 = y();
+    g2.next();
+    var v2 = g2.return("test return");
+    assertEq(v2.done, true);
+    assertEq(v2.value, "iter.return");
+    assertEq(returnCalled, ++returnCalledExpected);
+    assertEq(nextCalled, ++nextCalledExpected);
+    g2.next();
+    assertEq(nextCalled, nextCalledExpected);
+
+    // G.p.return calls "return", and if the result.done is false, continue
+    // yielding.
+    iterable[Symbol.iterator] = makeIterator({
+        next: function() {
+            nextCalled++;
+            return { done: false };
+        },
+        ret: function() {
+            returnCalled++;
+            return { done: false, value: "iter.return" };
+        }
+    });
+    var g3 = y();
+    g3.next();
+    var v3 = g3.return("test return");
+    assertEq(v3.done, false);
+    assertEq(v3.value, "iter.return");
+    assertEq(returnCalled, ++returnCalledExpected);
+    assertEq(nextCalled, ++nextCalledExpected);
+    g3.next();
+    assertEq(nextCalled, ++nextCalledExpected);
+
+    // G.p.return throwing does not re-call iter.return.
+    iterable[Symbol.iterator] = makeIterator({
+        ret: function() {
+            returnCalled++;
+            throw "in iter.return";
+        }
+    });
+    var g4 = y();
+    g4.next();
+    assertThrowsValue(function() {
+        g4.return("in test");
+    }, "in iter.return");
+    assertEq(returnCalled, ++returnCalledExpected);
+
+    // G.p.return expects iter.return to return an Object.
+    iterable[Symbol.iterator] = makeIterator({
+        ret: function() {
+            returnCalled++;
+            return 42;
+        }
+    });
+    var g5 = y();
+    g5.next();
+    assertThrowsInstanceOf(function() {
+        g5.return("foo");
+    }, TypeError);
+    assertEq(returnCalled, ++returnCalledExpected);
+
+    // IteratorClose expects iter.return to return an Object.
+    var g6 = y();
+    g6.next();
+    var exc;
+    try {
+        g6.throw("foo");
+    } catch (e) {
+        exc = e;
+    } finally {
+        assertEq(exc instanceof TypeError, true);
+        // The message test is here because instanceof TypeError doesn't
+        // distinguish the non-Object return TypeError and the
+        // throw-method-is-not-defined iterator protocol error.
+        assertEq(exc.toString().indexOf("non-object") > 0, true);
+    }
+    assertEq(returnCalled, ++returnCalledExpected);
+
+    // G.p.return passes its argument to "return".
+    iterable[Symbol.iterator] = makeIterator({
+        ret: function(x) {
+            assertEq(x, "in test");
+            returnCalled++;
+            return { done: true };
+        }
+    });
+    var g7 = y();
+    g7.next();
+    g7.return("in test");
+    assertEq(returnCalled, ++returnCalledExpected);
+
+    // If a throw method is present, do not call "return".
+    iterable[Symbol.iterator] = makeIterator({
+        throw: function(e) {
+            throwCalled++;
+            throw e;
+        },
+        ret: function(x) {
+            returnCalled++;
+            return { done: true };
+        }
+    });
+    var g8 = y();
+    g8.next();
+    assertThrowsValue(function() {
+        g8.throw("foo");
+    }, "foo");
+    assertEq(throwCalled, ++throwCalledExpected);
+    assertEq(returnCalled, returnCalledExpected);
+}
+
+test();
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0);
diff --git a/js/src/tests/ecma_6/Map/constructor-iterator-close.js b/js/src/tests/ecma_6/Map/constructor-iterator-close.js
new file mode 100644
index 0000000000..ba4bee4a74
--- /dev/null
+++ b/js/src/tests/ecma_6/Map/constructor-iterator-close.js
@@ -0,0 +1,253 @@
+var BUGNUMBER = 1180306;
+var summary = 'Map/Set/WeakMap/WeakSet constructor should close iterator on error';
+
+print(BUGNUMBER + ": " + summary);
+
+function test(ctors, { nextVal=undefined,
+                       nextThrowVal=undefined,
+                       modifier=undefined,
+                       exceptionVal=undefined,
+                       exceptionType=undefined,
+                       closed=true }) {
+    function getIterable() {
+        let iterable = {
+            closed: false,
+            [Symbol.iterator]() {
+                let iterator = {
+                    first: true,
+                    next() {
+                        if (this.first) {
+                            this.first = false;
+                            if (nextThrowVal)
+                                throw nextThrowVal;
+                            return nextVal;
+                        }
+                        return { value: undefined, done: true };
+                    },
+                    return() {
+                        iterable.closed = true;
+                        return {};
+                    }
+                };
+                if (modifier)
+                    modifier(iterator, iterable);
+
+                return iterator;
+            }
+        };
+        return iterable;
+    }
+
+    for (let ctor of ctors) {
+        let iterable = getIterable();
+        if (exceptionVal) {
+            let caught = false;
+            try {
+                new ctor(iterable);
+            } catch (e) {
+                assertEq(e, exceptionVal);
+                caught = true;
+            }
+            assertEq(caught, true);
+        } else if (exceptionType) {
+            assertThrowsInstanceOf(() => new ctor(iterable), exceptionType);
+        } else {
+            new ctor(iterable);
+        }
+        assertEq(iterable.closed, closed);
+    }
+}
+
+// == Error cases with close ==
+
+// ES 2017 draft 23.1.1.1 Map step 8.d.ii.
+// ES 2017 draft 23.3.1.1 WeakMap step 8.d.ii.
+test([Map, WeakMap], {
+    nextVal: { value: "non object", done: false },
+    exceptionType: TypeError,
+    closed: true,
+});
+
+// ES 2017 draft 23.1.1.1 Map step 8.f.
+// ES 2017 draft 23.3.1.1 WeakMap step 8.f.
+test([Map, WeakMap], {
+    nextVal: { value: { get 0() { throw "0 getter throws"; } }, done: false },
+    exceptionVal: "0 getter throws",
+    closed: true,
+});
+
+// ES 2017 draft 23.1.1.1 Map step 8.h.
+// ES 2017 draft 23.3.1.1 WeakMap step 8.h.
+test([Map, WeakMap], {
+    nextVal: { value: { 0: {}, get 1() { throw "1 getter throws"; } }, done: false },
+    exceptionVal: "1 getter throws",
+    closed: true,
+});
+
+// ES 2017 draft 23.1.1.1 Map step 8.j.
+// ES 2017 draft 23.3.1.1 WeakMap step 8.j.
+class MyMap extends Map {
+    set(k, v) {
+        throw "setter throws";
+    }
+}
+class MyWeakMap extends WeakMap {
+    set(k, v) {
+        throw "setter throws";
+    }
+}
+test([MyMap, MyWeakMap], {
+    nextVal: { value: [{}, {}], done: false },
+    exceptionVal: "setter throws",
+    closed: true,
+});
+
+// ES 2017 draft 23.2.1.1 Set step 8.e.
+// ES 2017 draft 23.4.1.1 WeakSet step 8.e.
+class MySet extends Set {
+    add(v) {
+        throw "adder throws";
+    }
+}
+class MyWeakSet extends WeakSet {
+    add(v) {
+        throw "adder throws";
+    }
+}
+test([MySet, MyWeakSet], {
+    nextVal: { value: {}, done: false },
+    exceptionVal: "adder throws",
+    closed: true,
+});
+
+// ES 2017 draft 7.4.6 step 3.
+// if GetMethod fails, the thrown value should be used.
+test([MyMap, MySet, MyWeakMap, MyWeakSet], {
+    nextVal: { value: [{}, {}], done: false },
+    modifier: (iterator, iterable) => {
+        Object.defineProperty(iterator, "return", {
+            get: function() {
+                iterable.closed = true;
+                throw "return getter throws";
+            }
+        });
+    },
+    exceptionVal: "return getter throws",
+    closed: true,
+});
+test([MyMap, MySet, MyWeakMap, MyWeakSet], {
+    nextVal: { value: [{}, {}], done: false },
+    modifier: (iterator, iterable) => {
+        Object.defineProperty(iterator, "return", {
+            get: function() {
+                iterable.closed = true;
+                return "non object";
+            }
+        });
+    },
+    exceptionType: TypeError,
+    closed: true,
+});
+test([MyMap, MySet, MyWeakMap, MyWeakSet], {
+    nextVal: { value: [{}, {}], done: false },
+    modifier: (iterator, iterable) => {
+        Object.defineProperty(iterator, "return", {
+            get: function() {
+                iterable.closed = true;
+                // Non callable.
+                return {};
+            }
+        });
+    },
+    exceptionType: TypeError,
+    closed: true,
+});
+
+// ES 2017 draft 7.4.6 steps 6.
+// if return method throws, the thrown value should be ignored.
+test([MyMap, MyWeakMap], {
+    nextVal: { value: [{}, {}], done: false },
+    modifier: (iterator, iterable) => {
+        iterator.return = function() {
+            iterable.closed = true;
+            throw "return throws";
+        };
+    },
+    exceptionVal: "setter throws",
+    closed: true,
+});
+test([MySet, MyWeakSet], {
+    nextVal: { value: [{}, {}], done: false },
+    modifier: (iterator, iterable) => {
+        iterator.return = function() {
+            iterable.closed = true;
+            throw "return throws";
+        };
+    },
+    exceptionVal: "adder throws",
+    closed: true,
+});
+
+test([MyMap, MyWeakMap], {
+    nextVal: { value: [{}, {}], done: false },
+    modifier: (iterator, iterable) => {
+        iterator.return = function() {
+            iterable.closed = true;
+            return "non object";
+        };
+    },
+    exceptionVal: "setter throws",
+    closed: true,
+});
+test([MySet, MyWeakSet], {
+    nextVal: { value: [{}, {}], done: false },
+    modifier: (iterator, iterable) => {
+        iterator.return = function() {
+            iterable.closed = true;
+            return "non object";
+        };
+    },
+    exceptionVal: "adder throws",
+    closed: true,
+});
+
+// == Error cases without close ==
+
+// ES 2017 draft 23.1.1.1 Map step 8.a.
+// ES 2017 draft 23.3.1.1 WeakMap step 8.a.
+// ES 2017 draft 23.2.1.1 Set step 8.a.
+// ES 2017 draft 23.4.1.1 WeakSet step 8.a.
+test([Map, WeakMap, Set, WeakSet], {
+    nextThrowVal: "next throws",
+    exceptionVal: "next throws",
+    closed: false,
+});
+test([Map, WeakMap, Set, WeakSet], {
+    nextVal: { value: {}, get done() { throw "done getter throws"; } },
+    exceptionVal: "done getter throws",
+    closed: false,
+});
+
+// ES 2017 draft 23.1.1.1 Map step 8.c.
+// ES 2017 draft 23.3.1.1 WeakMap step 8.c.
+// ES 2017 draft 23.2.1.1 Set step 8.c.
+// ES 2017 draft 23.4.1.1 WeakSet step 8.c.
+test([Map, WeakMap, Set, WeakSet], {
+    nextVal: { get value() { throw "value getter throws"; }, done: false },
+    exceptionVal: "value getter throws",
+    closed: false,
+});
+
+// == Successful cases ==
+
+test([Map, WeakMap], {
+    nextVal: { value: [{}, {}], done: false },
+    closed: false,
+});
+test([Set, WeakSet], {
+    nextVal: { value: {}, done: false },
+    closed: false,
+});
+
+if (typeof reportCompare === 'function')
+  reportCompare(true, true);
diff --git a/js/src/tests/ecma_6/Object/accessor-name.js b/js/src/tests/ecma_6/Object/accessor-name.js
index 1b5268e072..f238a2aefc 100644
--- a/js/src/tests/ecma_6/Object/accessor-name.js
+++ b/js/src/tests/ecma_6/Object/accessor-name.js
@@ -27,10 +27,9 @@ o = {get case() { }, set case(v) {}}
 assertEq(name(o, "case", true), "get case");
 assertEq(name(o, "case", false), "set case");
 
-// Congratulations on implementing these!
-assertEq(name({get ["a"]() {}}, "a", true), "");
-assertEq(name({get [123]() {}}, "123", true), "");
-assertEq(name({set ["a"](v) {}}, "a", false), "");
-assertEq(name({set [123](v) {}}, "123", false), "");
+assertEq(name({get ["a"]() {}}, "a", true), "get a");
+assertEq(name({get [123]() {}}, "123", true), "get 123");
+assertEq(name({set ["a"](v) {}}, "a", false), "set a");
+assertEq(name({set [123](v) {}}, "123", false), "set 123");
 
 reportCompare(true, true);
diff --git a/js/src/tests/ecma_6/Promise/iterator-close.js b/js/src/tests/ecma_6/Promise/iterator-close.js
new file mode 100644
index 0000000000..f17260d05b
--- /dev/null
+++ b/js/src/tests/ecma_6/Promise/iterator-close.js
@@ -0,0 +1,234 @@
+// |reftest| skip-if(!xulRuntime.shell) -- needs drainJobQueue
+
+var BUGNUMBER = 1180306;
+var summary = 'Promise.{all,race} should close iterator on error';
+
+print(BUGNUMBER + ": " + summary);
+
+function test(ctor, props, { nextVal=undefined,
+                             nextThrowVal=undefined,
+                             modifier=undefined,
+                             rejectReason=undefined,
+                             rejectType=undefined,
+                             closed=true }) {
+    function getIterable() {
+        let iterable = {
+            closed: false,
+            [Symbol.iterator]() {
+                let iterator = {
+                    first: true,
+                    next() {
+                        if (this.first) {
+                            this.first = false;
+                            if (nextThrowVal)
+                                throw nextThrowVal;
+                            return nextVal;
+                        }
+                        return { value: undefined, done: true };
+                    },
+                    return() {
+                        iterable.closed = true;
+                        return {};
+                    }
+                };
+                if (modifier)
+                    modifier(iterator, iterable);
+
+                return iterator;
+            }
+        };
+        return iterable;
+    }
+    for (let prop of props) {
+        let iterable = getIterable();
+        let e;
+        ctor[prop](iterable).catch(e_ => { e = e_; });
+        drainJobQueue();
+        if(rejectType)
+            assertEq(e instanceof rejectType, true);
+        else
+            assertEq(e, rejectReason);
+        assertEq(iterable.closed, closed);
+    }
+}
+
+// == Error cases with close ==
+
+// ES 2017 draft 25.4.4.1.1 step 6.i.
+// ES 2017 draft 25.4.4.3.1 step 3.h.
+class MyPromiseStaticResolveGetterThrows extends Promise {
+    static get resolve() {
+        throw "static resolve getter throws";
+    }
+};
+test(MyPromiseStaticResolveGetterThrows, ["all", "race"], {
+    nextVal: { value: Promise.resolve(1), done: false },
+    rejectReason: "static resolve getter throws",
+    closed: true,
+});
+
+class MyPromiseStaticResolveThrows extends Promise {
+    static resolve() {
+        throw "static resolve throws";
+    }
+};
+test(MyPromiseStaticResolveThrows, ["all", "race"], {
+    nextVal: { value: Promise.resolve(1), done: false },
+    rejectReason: "static resolve throws",
+    closed: true,
+});
+
+// ES 2017 draft 25.4.4.1.1 step 6.q.
+// ES 2017 draft 25.4.4.3.1 step 3.i.
+class MyPromiseThenGetterThrows extends Promise {
+    static resolve() {
+        return {
+            get then() {
+                throw "then getter throws";
+            }
+        };
+    }
+};
+test(MyPromiseThenGetterThrows, ["all", "race"], {
+    nextVal: { value: Promise.resolve(1), done: false },
+    rejectReason: "then getter throws",
+    closed: true,
+});
+
+class MyPromiseThenThrows extends Promise {
+    static resolve() {
+        return {
+            then() {
+                throw "then throws";
+            }
+        };
+    }
+};
+test(MyPromiseThenThrows, ["all", "race"], {
+    nextVal: { value: Promise.resolve(1), done: false },
+    rejectReason: "then throws",
+    closed: true,
+});
+
+// ES 2017 draft 7.4.6 step 3.
+// if GetMethod fails, the thrown value should be used.
+test(MyPromiseThenThrows, ["all", "race"], {
+    nextVal: { value: Promise.resolve(1), done: false },
+    modifier: (iterator, iterable) => {
+        Object.defineProperty(iterator, "return", {
+            get: function() {
+                iterable.closed = true;
+                throw "return getter throws";
+            }
+        });
+    },
+    rejectReason: "return getter throws",
+    closed: true,
+});
+test(MyPromiseThenThrows, ["all", "race"], {
+    nextVal: { value: Promise.resolve(1), done: false },
+    modifier: (iterator, iterable) => {
+        Object.defineProperty(iterator, "return", {
+            get: function() {
+                iterable.closed = true;
+                return "non object";
+            }
+        });
+    },
+    rejectType: TypeError,
+    closed: true,
+});
+test(MyPromiseThenThrows, ["all", "race"], {
+    nextVal: { value: Promise.resolve(1), done: false },
+    modifier: (iterator, iterable) => {
+        Object.defineProperty(iterator, "return", {
+            get: function() {
+                iterable.closed = true;
+                // Non callable.
+                return {};
+            }
+        });
+    },
+    rejectType: TypeError,
+    closed: true,
+});
+
+// ES 2017 draft 7.4.6 steps 6.
+// if return method throws, the thrown value should be ignored.
+test(MyPromiseThenThrows, ["all", "race"], {
+    nextVal: { value: Promise.resolve(1), done: false },
+    modifier: (iterator, iterable) => {
+        iterator.return = function() {
+            iterable.closed = true;
+            throw "return throws";
+        };
+    },
+    rejectReason: "then throws",
+    closed: true,
+});
+
+test(MyPromiseThenThrows, ["all", "race"], {
+    nextVal: { value: Promise.resolve(1), done: false },
+    modifier: (iterator, iterable) => {
+        iterator.return = function() {
+            iterable.closed = true;
+            return "non object";
+        };
+    },
+    rejectReason: "then throws",
+    closed: true,
+});
+
+// == Error cases without close ==
+
+// ES 2017 draft 25.4.4.1.1 step 6.a.
+test(Promise, ["all", "race"], {
+    nextThrowVal: "next throws",
+    rejectReason: "next throws",
+    closed: false,
+});
+
+test(Promise, ["all", "race"], {
+    nextVal: { value: {}, get done() { throw "done getter throws"; } },
+    rejectReason: "done getter throws",
+    closed: false,
+});
+
+// ES 2017 draft 25.4.4.1.1 step 6.e.
+test(Promise, ["all", "race"], {
+    nextVal: { get value() { throw "value getter throws"; }, done: false },
+    rejectReason: "value getter throws",
+    closed: false,
+});
+
+// ES 2017 draft 25.4.4.1.1 step 6.d.iii.2.
+let first = true;
+class MyPromiseResolveThrows extends Promise {
+    constructor(executer) {
+        if (first) {
+            first = false;
+            super((resolve, reject) => {
+                executer(() => {
+                    throw "resolve throws";
+                }, reject);
+            });
+            return;
+        }
+        super(executer);
+    }
+};
+test(MyPromiseResolveThrows, ["all"], {
+    nextVal: { value: undefined, done: true },
+    rejectReason: "resolve throws",
+    closed: false,
+});
+
+// == Successful cases ==
+
+test(Promise, ["all", "race"], {
+    nextVal: { value: Promise.resolve(1), done: false },
+    closed: false,
+});
+
+if (typeof reportCompare === 'function')
+  reportCompare(true, true);
diff --git a/js/src/tests/ecma_6/RegExp/compile-lastIndex.js b/js/src/tests/ecma_6/RegExp/compile-lastIndex.js
index 80c820f43d..5bd7e0b983 100644
--- a/js/src/tests/ecma_6/RegExp/compile-lastIndex.js
+++ b/js/src/tests/ecma_6/RegExp/compile-lastIndex.js
@@ -17,15 +17,12 @@ print(BUGNUMBER + ": " + summary);
 
 var regex = /foo/i;
 
-// Aside from making .lastIndex non-writable, this has two incidental effects
+// Aside from making .lastIndex non-writable, this has one incidental effect
 // ubiquitously tested through the remainder of this test:
 //
 //   * RegExp.prototype.compile will do everything it ordinarily does, BUT it
 //     will throw a TypeError when attempting to zero .lastIndex immediately
 //     before succeeding overall.
-//   * RegExp.prototype.test for a non-global and non-sticky regular expression,
-//     in case of a match, will return true (as normal).  BUT if no match is
-//     found, it will throw a TypeError when attempting to modify .lastIndex.
 //
 // Ain't it great?
 Object.defineProperty(regex, "lastIndex", { value: 42, writable: false });
@@ -40,8 +37,8 @@ assertEq(regex.lastIndex, 42);
 
 assertEq(regex.test("foo"), true);
 assertEq(regex.test("FOO"), true);
-assertThrowsInstanceOf(() => regex.test("bar"), TypeError);
-assertThrowsInstanceOf(() => regex.test("BAR"), TypeError);
+assertEq(regex.test("bar"), false);
+assertEq(regex.test("BAR"), false);
 
 assertThrowsInstanceOf(() => regex.compile("bar"), TypeError);
 
@@ -52,10 +49,10 @@ assertEq(regex.unicode, false);
 assertEq(regex.sticky, false);
 assertEq(Object.getOwnPropertyDescriptor(regex, "lastIndex").writable, false);
 assertEq(regex.lastIndex, 42);
-assertThrowsInstanceOf(() => regex.test("foo"), TypeError);
-assertThrowsInstanceOf(() => regex.test("FOO"), TypeError);
+assertEq(regex.test("foo"), false);
+assertEq(regex.test("FOO"), false);
 assertEq(regex.test("bar"), true);
-assertThrowsInstanceOf(() => regex.test("BAR"), TypeError);
+assertEq(regex.test("BAR"), false);
 
 assertThrowsInstanceOf(() => regex.compile("^baz", "m"), TypeError);
 
@@ -66,19 +63,16 @@ assertEq(regex.unicode, false);
 assertEq(regex.sticky, false);
 assertEq(Object.getOwnPropertyDescriptor(regex, "lastIndex").writable, false);
 assertEq(regex.lastIndex, 42);
-assertThrowsInstanceOf(() => regex.test("foo"), TypeError);
-assertThrowsInstanceOf(() => regex.test("FOO"), TypeError);
-assertThrowsInstanceOf(() => regex.test("bar"), TypeError);
-assertThrowsInstanceOf(() => regex.test("BAR"), TypeError);
+assertEq(regex.test("foo"), false);
+assertEq(regex.test("FOO"), false);
+assertEq(regex.test("bar"), false);
+assertEq(regex.test("BAR"), false);
 assertEq(regex.test("baz"), true);
-assertThrowsInstanceOf(() => regex.test("BAZ"), TypeError);
-assertThrowsInstanceOf(() => regex.test("012345678901234567890123456789012345678901baz"),
-                       TypeError);
+assertEq(regex.test("BAZ"), false);
+assertEq(regex.test("012345678901234567890123456789012345678901baz"), false);
 assertEq(regex.test("012345678901234567890123456789012345678901\nbaz"), true);
-assertThrowsInstanceOf(() => regex.test("012345678901234567890123456789012345678901BAZ"),
-                       TypeError);
-assertThrowsInstanceOf(() => regex.test("012345678901234567890123456789012345678901\nBAZ"),
-                       TypeError);
+assertEq(regex.test("012345678901234567890123456789012345678901BAZ"), false);
+assertEq(regex.test("012345678901234567890123456789012345678901\nBAZ"), false);
 
 /******************************************************************************/
 
diff --git a/js/src/tests/ecma_6/RegExp/compile-symbol.js b/js/src/tests/ecma_6/RegExp/compile-symbol.js
new file mode 100644
index 0000000000..9eea1124c8
--- /dev/null
+++ b/js/src/tests/ecma_6/RegExp/compile-symbol.js
@@ -0,0 +1,14 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+for (let sym of [Symbol.iterator, Symbol(), Symbol("description")]) {
+    let re = /a/;
+
+    assertEq(re.source, "a");
+    assertThrowsInstanceOf(() => re.compile(sym), TypeError);
+    assertEq(re.source, "a");
+}
+
+if (typeof reportCompare === 'function')
+    reportCompare(0, 0);
diff --git a/js/src/tests/ecma_6/RegExp/constructor-symbol.js b/js/src/tests/ecma_6/RegExp/constructor-symbol.js
new file mode 100644
index 0000000000..503d7e5a85
--- /dev/null
+++ b/js/src/tests/ecma_6/RegExp/constructor-symbol.js
@@ -0,0 +1,14 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+for (let sym of [Symbol.iterator, Symbol(), Symbol("description")]) {
+    assertThrowsInstanceOf(() => RegExp(sym), TypeError);
+    assertThrowsInstanceOf(() => new RegExp(sym), TypeError);
+
+    assertThrowsInstanceOf(() => RegExp(sym, "g"), TypeError);
+    assertThrowsInstanceOf(() => new RegExp(sym, "g"), TypeError);
+}
+
+if (typeof reportCompare === 'function')
+    reportCompare(0, 0);
diff --git a/js/src/tests/ecma_6/RegExp/match-local-tolength-recompilation.js b/js/src/tests/ecma_6/RegExp/match-local-tolength-recompilation.js
new file mode 100644
index 0000000000..9a992f81f4
--- /dev/null
+++ b/js/src/tests/ecma_6/RegExp/match-local-tolength-recompilation.js
@@ -0,0 +1,75 @@
+// Side-effects when calling ToLength(regExp.lastIndex) in
+// RegExp.prototype[@@match] for non-global RegExp can recompile the RegExp.
+
+for (var flag of ["", "y"]) {
+    var regExp = new RegExp("a", flag);
+
+    regExp.lastIndex = {
+        valueOf() {
+            regExp.compile("b");
+            return 0;
+        }
+    };
+
+    var result = regExp[Symbol.match]("b");
+    assertEq(result !== null, true);
+}
+
+// Recompilation modifies flag:
+// Case 1: Adds global flag, validate by checking lastIndex.
+var regExp = new RegExp("a", "");
+regExp.lastIndex = {
+    valueOf() {
+        // |regExp| is now in global mode, RegExpBuiltinExec should update the
+        // lastIndex property to reflect last match.
+        regExp.compile("a", "g");
+        return 0;
+    }
+};
+regExp[Symbol.match]("a");
+assertEq(regExp.lastIndex, 1);
+
+// Case 2: Removes sticky flag with match, validate by checking lastIndex.
+var regExp = new RegExp("a", "y");
+regExp.lastIndex = {
+    valueOf() {
+        // |regExp| is no longer sticky, RegExpBuiltinExec shouldn't modify the
+        // lastIndex property.
+        regExp.compile("a", "");
+        regExp.lastIndex = 9000;
+        return 0;
+    }
+};
+regExp[Symbol.match]("a");
+assertEq(regExp.lastIndex, 9000);
+
+// Case 3.a: Removes sticky flag without match, validate by checking lastIndex.
+var regExp = new RegExp("a", "y");
+regExp.lastIndex = {
+    valueOf() {
+        // |regExp| is no longer sticky, RegExpBuiltinExec shouldn't modify the
+        // lastIndex property.
+        regExp.compile("b", "");
+        regExp.lastIndex = 9001;
+        return 0;
+    }
+};
+regExp[Symbol.match]("a");
+assertEq(regExp.lastIndex, 9001);
+
+// Case 3.b: Removes sticky flag without match, validate by checking lastIndex.
+var regExp = new RegExp("a", "y");
+regExp.lastIndex = {
+    valueOf() {
+        // |regExp| is no longer sticky, RegExpBuiltinExec shouldn't modify the
+        // lastIndex property.
+        regExp.compile("b", "");
+        regExp.lastIndex = 9002;
+        return 10000;
+    }
+};
+regExp[Symbol.match]("a");
+assertEq(regExp.lastIndex, 9002);
+
+if (typeof reportCompare === "function")
+    reportCompare(true, true);
diff --git a/js/src/tests/ecma_6/RegExp/prototype.js b/js/src/tests/ecma_6/RegExp/prototype.js
new file mode 100644
index 0000000000..528142ab0c
--- /dev/null
+++ b/js/src/tests/ecma_6/RegExp/prototype.js
@@ -0,0 +1,31 @@
+const t = RegExp.prototype;
+
+const properties = "toSource,toString,compile,exec,test," +
+                   "flags,global,ignoreCase,multiline,source,sticky,unicode," +
+                   "constructor," +
+                   "Symbol(Symbol.match),Symbol(Symbol.replace),Symbol(Symbol.search),Symbol(Symbol.split)";
+assertEq(Reflect.ownKeys(t).map(String).toString(), properties);
+
+
+// Invoking getters on the prototype should not throw
+function getter(name) {
+    return Object.getOwnPropertyDescriptor(t, name).get.call(t);
+}
+
+assertEq(getter("flags"), "");
+assertEq(getter("global"), undefined);
+assertEq(getter("ignoreCase"), undefined);
+assertEq(getter("multiline"), undefined);
+assertEq(getter("source"), "(?:)");
+assertEq(getter("sticky"), undefined);
+assertEq(getter("unicode"), undefined);
+
+assertEq(t.toString(), "/(?:)/");
+
+// The methods don't work with the prototype
+assertThrowsInstanceOf(() => t.compile("b", "i"), TypeError);
+assertThrowsInstanceOf(() => t.test("x"), TypeError);
+assertThrowsInstanceOf(() => t.exec("x"), TypeError);
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0);
diff --git a/js/src/tests/ecma_6/RegExp/replace-local-tolength-lastindex.js b/js/src/tests/ecma_6/RegExp/replace-local-tolength-lastindex.js
new file mode 100644
index 0000000000..7ba840e000
--- /dev/null
+++ b/js/src/tests/ecma_6/RegExp/replace-local-tolength-lastindex.js
@@ -0,0 +1,22 @@
+// RegExp.prototype[@@replace] always executes ToLength(regExp.lastIndex) for
+// non-global RegExps.
+
+for (var flag of ["", "g", "y", "gy"]) {
+    var regExp = new RegExp("a", flag);
+
+    var called = false;
+    regExp.lastIndex = {
+        valueOf() {
+            assertEq(called, false);
+            called = true;
+            return 0;
+        }
+    };
+
+    assertEq(called, false);
+    regExp[Symbol.replace]("");
+    assertEq(called, !flag.includes("g"));
+}
+
+if (typeof reportCompare === "function")
+    reportCompare(true, true);
diff --git a/js/src/tests/ecma_6/RegExp/replace-local-tolength-recompilation.js b/js/src/tests/ecma_6/RegExp/replace-local-tolength-recompilation.js
new file mode 100644
index 0000000000..e03177286f
--- /dev/null
+++ b/js/src/tests/ecma_6/RegExp/replace-local-tolength-recompilation.js
@@ -0,0 +1,75 @@
+// Side-effects when calling ToLength(regExp.lastIndex) in
+// RegExp.prototype[@@replace] for non-global RegExp can recompile the RegExp.
+
+for (var flag of ["", "y"]) {
+    var regExp = new RegExp("a", flag);
+
+    regExp.lastIndex = {
+        valueOf() {
+            regExp.compile("b");
+            return 0;
+        }
+    };
+
+    var result = regExp[Symbol.replace]("b", "pass");
+    assertEq(result, "pass");
+}
+
+// Recompilation modifies flag:
+// Case 1: Adds global flag, validate by checking lastIndex.
+var regExp = new RegExp("a", "");
+regExp.lastIndex = {
+    valueOf() {
+        // |regExp| is now in global mode, RegExpBuiltinExec should update the
+        // lastIndex property to reflect last match.
+        regExp.compile("a", "g");
+        return 0;
+    }
+};
+regExp[Symbol.replace]("a", "");
+assertEq(regExp.lastIndex, 1);
+
+// Case 2: Removes sticky flag with match, validate by checking lastIndex.
+var regExp = new RegExp("a", "y");
+regExp.lastIndex = {
+    valueOf() {
+        // |regExp| is no longer sticky, RegExpBuiltinExec shouldn't modify the
+        // lastIndex property.
+        regExp.compile("a", "");
+        regExp.lastIndex = 9000;
+        return 0;
+    }
+};
+regExp[Symbol.replace]("a", "");
+assertEq(regExp.lastIndex, 9000);
+
+// Case 3.a: Removes sticky flag without match, validate by checking lastIndex.
+var regExp = new RegExp("a", "y");
+regExp.lastIndex = {
+    valueOf() {
+        // |regExp| is no longer sticky, RegExpBuiltinExec shouldn't modify the
+        // lastIndex property.
+        regExp.compile("b", "");
+        regExp.lastIndex = 9001;
+        return 0;
+    }
+};
+regExp[Symbol.replace]("a", "");
+assertEq(regExp.lastIndex, 9001);
+
+// Case 3.b: Removes sticky flag without match, validate by checking lastIndex.
+var regExp = new RegExp("a", "y");
+regExp.lastIndex = {
+    valueOf() {
+        // |regExp| is no longer sticky, RegExpBuiltinExec shouldn't modify the
+        // lastIndex property.
+        regExp.compile("b", "");
+        regExp.lastIndex = 9002;
+        return 10000;
+    }
+};
+regExp[Symbol.replace]("a", "");
+assertEq(regExp.lastIndex, 9002);
+
+if (typeof reportCompare === "function")
+    reportCompare(true, true);
diff --git a/js/src/tests/ecma_6/RegExp/search-trace.js b/js/src/tests/ecma_6/RegExp/search-trace.js
index ef14514c65..fc6bee754c 100644
--- a/js/src/tests/ecma_6/RegExp/search-trace.js
+++ b/js/src/tests/ecma_6/RegExp/search-trace.js
@@ -56,6 +56,7 @@ assertEq(log,
          "get:lastIndex," +
          "set:lastIndex," +
          "get:exec,call:exec," +
+         "get:lastIndex," +
          "set:lastIndex," +
          "get:result[index],");
 
@@ -70,6 +71,7 @@ assertEq(log,
          "get:lastIndex," +
          "set:lastIndex," +
          "get:exec,call:exec," +
+         "get:lastIndex," +
          "set:lastIndex,");
 
 if (typeof reportCompare === "function")
diff --git a/js/src/tests/ecma_6/RegExp/unicode-ignoreCase-word-boundary.js b/js/src/tests/ecma_6/RegExp/unicode-ignoreCase-word-boundary.js
new file mode 100644
index 0000000000..c1a04bd3da
--- /dev/null
+++ b/js/src/tests/ecma_6/RegExp/unicode-ignoreCase-word-boundary.js
@@ -0,0 +1,25 @@
+var BUGNUMBER = 1338373;
+var summary = "Word boundary should match U+017F and U+212A in unicode+ignoreCase.";
+
+assertEq(/\b/iu.test('\u017F'), true);
+assertEq(/\b/i.test('\u017F'), false);
+assertEq(/\b/u.test('\u017F'), false);
+assertEq(/\b/.test('\u017F'), false);
+
+assertEq(/\b/iu.test('\u212A'), true);
+assertEq(/\b/i.test('\u212A'), false);
+assertEq(/\b/u.test('\u212A'), false);
+assertEq(/\b/.test('\u212A'), false);
+
+assertEq(/\B/iu.test('\u017F'), false);
+assertEq(/\B/i.test('\u017F'), true);
+assertEq(/\B/u.test('\u017F'), true);
+assertEq(/\B/.test('\u017F'), true);
+
+assertEq(/\B/iu.test('\u212A'), false);
+assertEq(/\B/i.test('\u212A'), true);
+assertEq(/\B/u.test('\u212A'), true);
+assertEq(/\B/.test('\u212A'), true);
+
+if (typeof reportCompare === "function")
+    reportCompare(true, true);
diff --git a/js/src/tests/ecma_6/Statements/for-inof-finally.js b/js/src/tests/ecma_6/Statements/for-inof-finally.js
new file mode 100644
index 0000000000..e1f0c77e12
--- /dev/null
+++ b/js/src/tests/ecma_6/Statements/for-inof-finally.js
@@ -0,0 +1,78 @@
+var BUGNUMBER = 1332881;
+var summary =
+  "Leaving for-in and try should handle stack value in correct order";
+
+print(BUGNUMBER + ": " + summary);
+
+var called = 0;
+function reset() {
+  called = 0;
+}
+var obj = {
+  [Symbol.iterator]() {
+    return {
+      next() {
+        return { value: 10, done: false };
+      },
+      return() {
+        called++;
+        return {};
+      }
+    };
+  }
+};
+
+var a = (function () {
+    for (var x in [0]) {
+        try {} finally {
+            return 11;
+        }
+    }
+})();
+assertEq(a, 11);
+
+reset();
+var b = (function () {
+    for (var x of obj) {
+        try {} finally {
+            return 12;
+        }
+    }
+})();
+assertEq(called, 1);
+assertEq(b, 12);
+
+reset();
+var c = (function () {
+    for (var x in [0]) {
+        for (var y of obj) {
+            try {} finally {
+                return 13;
+            }
+        }
+    }
+})();
+assertEq(called, 1);
+assertEq(c, 13);
+
+reset();
+var d = (function () {
+    for (var x in [0]) {
+        for (var y of obj) {
+            try {} finally {
+                for (var z in [0]) {
+                    for (var w of obj) {
+                        try {} finally {
+                            return 14;
+                        }
+                    }
+                }
+            }
+        }
+    }
+})();
+assertEq(called, 2);
+assertEq(d, 14);
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);
diff --git a/js/src/tests/ecma_6/Statements/for-of-iterator-close-throw.js b/js/src/tests/ecma_6/Statements/for-of-iterator-close-throw.js
new file mode 100644
index 0000000000..1974e416be
--- /dev/null
+++ b/js/src/tests/ecma_6/Statements/for-of-iterator-close-throw.js
@@ -0,0 +1,35 @@
+function test() {
+    var returnCalled = 0;
+    var returnCalledExpected = 0;
+    var catchEntered = 0;
+    var finallyEntered = 0;
+    var finallyEnteredExpected = 0;
+    var iterable = {};
+    iterable[Symbol.iterator] = makeIterator({
+        ret: function() {
+            returnCalled++;
+            throw 42;
+        }
+    });
+
+    // inner try cannot catch IteratorClose throwing
+    assertThrowsValue(function() {
+        for (var x of iterable) {
+            try {
+                return;
+            } catch (e) {
+                catchEntered++;
+            } finally {
+                finallyEntered++;
+            }
+        }
+    }, 42);
+    assertEq(returnCalled, ++returnCalledExpected);
+    assertEq(catchEntered, 0);
+    assertEq(finallyEntered, ++finallyEnteredExpected);
+}
+
+test();
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0);
diff --git a/js/src/tests/ecma_6/Statements/for-of-iterator-close.js b/js/src/tests/ecma_6/Statements/for-of-iterator-close.js
new file mode 100644
index 0000000000..b28895d8fe
--- /dev/null
+++ b/js/src/tests/ecma_6/Statements/for-of-iterator-close.js
@@ -0,0 +1,102 @@
+// Tests that IteratorReturn is called when a for-of loop has an abrupt
+// completion value during non-iterator code.
+
+function test() {
+    var returnCalled = 0;
+    var returnCalledExpected = 0;
+    var iterable = {};
+    iterable[Symbol.iterator] = makeIterator({
+        ret: function() {
+            returnCalled++;
+            return {};
+        }
+    });
+
+    // break calls iter.return
+    for (var x of iterable)
+        break;
+    assertEq(returnCalled, ++returnCalledExpected);
+
+    // throw in body calls iter.return
+    assertThrowsValue(function() {
+        for (var x of iterable)
+            throw "in body";
+    }, "in body");
+    assertEq(returnCalled, ++returnCalledExpected);
+
+    // throw in lhs ref calls iter.return
+    function throwlhs() {
+        throw "in lhs";
+    }
+    assertThrowsValue(function() {
+        for ((throwlhs()) of iterable)
+            continue;
+    }, "in lhs");
+    assertEq(returnCalled, ++returnCalledExpected);
+
+    // throw in iter.return doesn't re-call iter.return
+    iterable[Symbol.iterator] = makeIterator({
+        ret: function() {
+            returnCalled++;
+            throw "in iter.return";
+        }
+    });
+    assertThrowsValue(function() {
+        for (var x of iterable)
+            break;
+    }, "in iter.return");
+    assertEq(returnCalled, ++returnCalledExpected);
+
+    // throw in iter.next doesn't call IteratorClose
+    iterable[Symbol.iterator] = makeIterator({
+        next: function() {
+            throw "in next";
+        }
+    });
+    assertThrowsValue(function() {
+        for (var x of iterable)
+            break;
+    }, "in next");
+    assertEq(returnCalled, returnCalledExpected);
+
+    // "return" must return an Object.
+    iterable[Symbol.iterator] = makeIterator({
+        ret: function() {
+            returnCalled++;
+            return 42;
+        }
+    });
+    assertThrowsInstanceOf(function() {
+        for (var x of iterable)
+            break;
+    }, TypeError);
+    assertEq(returnCalled, ++returnCalledExpected);
+
+    // continue doesn't call iter.return for the loop it's continuing
+    var i = 0;
+    iterable[Symbol.iterator] = makeIterator({
+        next: function() {
+            return { done: i++ > 5 };
+        },
+        ret: function() {
+            returnCalled++;
+            return {};
+        }
+    });
+    for (var x of iterable)
+        continue;
+    assertEq(returnCalled, returnCalledExpected);
+
+    // continue does call iter.return for loops it skips
+    i = 0;
+    L: do {
+        for (var x of iterable)
+            continue L;
+    } while (false);
+    assertEq(returnCalled, ++returnCalledExpected);
+}
+
+test();
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0);
diff --git a/js/src/tests/ecma_6/Syntax/identifiers-with-extended-unicode-escape.js b/js/src/tests/ecma_6/Syntax/identifiers-with-extended-unicode-escape.js
index 8e0a05fb50..e4b5f46029 100644
--- a/js/src/tests/ecma_6/Syntax/identifiers-with-extended-unicode-escape.js
+++ b/js/src/tests/ecma_6/Syntax/identifiers-with-extended-unicode-escape.js
@@ -98,7 +98,7 @@ const otherIdContinue = [
     0x19DA,     // NEW TAI LUE THAM DIGIT ONE, Gc=No
 ];
 
-for (let ident of [...idStart, ...otherIdStart]) {
+for (let ident of [...idStart, ...otherIdStart, ...idStartSupplemental]) {
     for (let count of leadingZeros) {
         let zeros = "0".repeat(count);
         eval(`
@@ -108,20 +108,13 @@ for (let ident of [...idStart, ...otherIdStart]) {
     }
 }
 
-// Move this to the loop above when Bug 1197230 is fixed.
-for (let ident of [...idStartSupplemental]) {
-    for (let zeros of leadingZeros) {
-        assertThrowsInstanceOf(() => eval(`\\u{${zeros}${ident.toString(16)}}`), SyntaxError);
-    }
-}
-
 for (let ident of [...idContinue, ...idContinueSupplemental, ...otherIdContinue]) {
     for (let zeros of leadingZeros) {
         assertThrowsInstanceOf(() => eval(`\\u{${zeros}${ident.toString(16)}}`), SyntaxError);
     }
 }
 
-for (let ident of [...idStart, ...otherIdStart, ...idContinue, ...otherIdContinue]) {
+for (let ident of [...idStart, ...otherIdStart, ...idContinue, ...otherIdContinue, ...idStartSupplemental, ...idContinueSupplemental]) {
     for (let zeros of leadingZeros) {
         eval(`
             let A\\u{${zeros}${ident.toString(16)}} = 123;
@@ -130,13 +123,6 @@ for (let ident of [...idStart, ...otherIdStart, ...idContinue, ...otherIdContinu
     }
 }
 
-// Move this to the loop above when Bug 1197230 is fixed.
-for (let ident of [...idStartSupplemental, ...idContinueSupplemental]) {
-    for (let zeros of leadingZeros) {
-        assertThrowsInstanceOf(() => eval(`\\u{${zeros}${ident.toString(16)}}`), SyntaxError);
-    }
-}
-
 
 const notIdentifiers = [
     0x0000,     // NULL, Gc=Cc
diff --git a/js/src/tests/ecma_6/shell.js b/js/src/tests/ecma_6/shell.js
index 06be6f2db6..756da9f36c 100644
--- a/js/src/tests/ecma_6/shell.js
+++ b/js/src/tests/ecma_6/shell.js
@@ -3,21 +3,43 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 (function(global) {
-  /** Yield every permutation of the elements in some array. */
-  global.Permutations = function* Permutations(items) {
-      if (items.length == 0) {
-          yield [];
-      } else {
-          items = items.slice(0);
-          for (let i = 0; i < items.length; i++) {
-              let swap = items[0];
-              items[0] = items[i];
-              items[i] = swap;
-              for (let e of Permutations(items.slice(1, items.length)))
-                  yield [items[0]].concat(e);
-          }
-      }
-  };
+    /** Yield every permutation of the elements in some array. */
+    global.Permutations = function* Permutations(items) {
+        if (items.length == 0) {
+            yield [];
+        } else {
+            items = items.slice(0);
+            for (let i = 0; i < items.length; i++) {
+                let swap = items[0];
+                items[0] = items[i];
+                items[i] = swap;
+                for (let e of Permutations(items.slice(1, items.length)))
+                    yield [items[0]].concat(e);
+            }
+        }
+    };
+
+    /** Make an iterator with a return method. */
+    global.makeIterator = function makeIterator(overrides) {
+        var throwMethod;
+        if (overrides && overrides.throw)
+            throwMethod = overrides.throw;
+        var iterator = {
+            throw: throwMethod,
+            next: function(x) {
+                if (overrides && overrides.next)
+                    return overrides.next(x);
+                return { done: false };
+            },
+            return: function(x) {
+                if (overrides && overrides.ret)
+                    return overrides.ret(x);
+                return { done: true };
+            }
+        };
+
+        return function() { return iterator; };
+    };
 })(this);
 
 if (typeof assertThrowsInstanceOf === 'undefined') {
diff --git a/js/src/tests/js1_8_5/extensions/clone-regexp.js b/js/src/tests/js1_8_5/extensions/clone-regexp.js
index 97f7557853..8541dae98c 100644
--- a/js/src/tests/js1_8_5/extensions/clone-regexp.js
+++ b/js/src/tests/js1_8_5/extensions/clone-regexp.js
@@ -22,7 +22,6 @@ function testRegExp(b, c=b) {
 testRegExp(RegExp(""));
 testRegExp(/(?:)/);
 testRegExp(/^(.*)$/gimy);
-testRegExp(RegExp.prototype);
 
 var re = /\bx\b/gi;
 re.expando = true;
diff --git a/js/src/tests/jstests.list b/js/src/tests/jstests.list
index a0f2f08bdd..1e23a3da37 100644
--- a/js/src/tests/jstests.list
+++ b/js/src/tests/jstests.list
@@ -46,6 +46,16 @@ skip script test262/ch09/9.3/9.3.1/S9.3.1_A2.js
 skip script test262/ch09/9.3/9.3.1/S9.3.1_A3_T2.js
 skip script test262/ch09/9.3/9.3.1/S9.3.1_A3_T1.js
 
+# ES2017 removed the strict arguments poison pill for the "caller" property
+# (bug 1324208).
+skip script test262/ch13/13.2/S13.2.3_A1.js
+skip script test262/ch10/10.6/10.6-14-1-s.js
+skip script test262/ch10/10.6/10.6-13-b-3-s.js
+skip script test262/ch10/10.6/10.6-14-b-1-s.js
+skip script test262/ch10/10.6/10.6-14-b-4-s.js
+skip script test262/ch10/10.6/10.6-13-b-1-s.js
+skip script test262/ch10/10.6/10.6-13-b-2-s.js
+
 #######################################################################
 # Tests disabled due to jstest limitations wrt imported test262 tests #
 #######################################################################