Add m-esr52 at 52.6.0

11 files changed, 1163 insertions, 0 deletions

diff --git a/js/src/tests/ecma_6/Destructuring/browser.js b/js/src/tests/ecma_6/Destructuring/browser.js
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/js/src/tests/ecma_6/Destructuring/browser.js
diff --git a/js/src/tests/ecma_6/Destructuring/cover-init-name-syntax.js b/js/src/tests/ecma_6/Destructuring/cover-init-name-syntax.js
new file mode 100644
index 0000000000..b37d8c2904
--- /dev/null
+++ b/js/src/tests/ecma_6/Destructuring/cover-init-name-syntax.js
@@ -0,0 +1,72 @@
+/* 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/. */
+
+
+// CoverInitName in arrow parameters.
+({a = 1}, {b = 2}, {c = 3}) => {};
+({a = 1} = {}, {b = 2}, {c = 3}) => {};
+({a = 1} = {}, {b = 2} = {}, {c = 3}) => {};
+({a = 1} = {}, {b = 2} = {}, {c = 3} = {}) => {};
+
+
+// CoverInitName in CoverParenthesizedExpressionAndArrowParameterList,
+// but not ArrowParameters.
+assertThrowsInstanceOf(() => eval(`
+    ({a = 1}, {b = 2}, {c = 3});
+`), SyntaxError);
+assertThrowsInstanceOf(() => eval(`
+    ({a = 1}, {b = 2}, {c = 3} = {});
+`), SyntaxError);
+assertThrowsInstanceOf(() => eval(`
+    ({a = 1}, {b = 2} = {}, {c = 3} = {});
+`), SyntaxError);
+
+
+// CoverInitName nested in array destructuring.
+[{a = 0}] = [{}];
+var [{a = 0}] = [{}];
+{ let [{a = 0}] = [{}]; }
+{ const [{a = 0}] = [{}]; }
+
+for ([{a = 0}] of []);
+for (var [{a = 0}] of []);
+for (let [{a = 0}] of []);
+for (const [{a = 0}] of []);
+
+function f([{a = 0}]) {}
+var h = ([{a = 0}]) => {};
+
+
+// CoverInitName nested in rest pattern.
+[...[{a = 0}]] = [{}];
+var [...[{a = 0}]] = [{}];
+{ let [...[{a = 0}]] = [{}]; }
+{ const [...[{a = 0}]] = [{}]; }
+
+for ([...[{a = 0}]] of []);
+for (var [...[{a = 0}]] of []);
+for (let [...[{a = 0}]] of []);
+for (const [...[{a = 0}]] of []);
+
+function f([...[{a = 0}]]) {}
+var h = ([...[{a = 0}]]) => {};
+
+
+// CoverInitName nested in object destructuring.
+({p: {a = 0}} = {p: {}});
+var {p: {a = 0}} = {p: {}};
+{ let {p: {a = 0}} = {p: {}}; }
+{ const {p: {a = 0}} = {p: {}}; }
+
+for ({p: {a = 0}} of []);
+for (var {p: {a = 0}} of []);
+for (let {p: {a = 0}} of []);
+for (const {p: {a = 0}} of []);
+
+function f({p: {a = 0}}) {}
+var h = ({p: {a = 0}}) => {};
+
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0);
diff --git a/js/src/tests/ecma_6/Destructuring/iterator-primitive.js b/js/src/tests/ecma_6/Destructuring/iterator-primitive.js
new file mode 100644
index 0000000000..17d100367c
--- /dev/null
+++ b/js/src/tests/ecma_6/Destructuring/iterator-primitive.js
@@ -0,0 +1,36 @@
+var BUGNUMBER = 1021835;
+var summary = "Returning non-object from @@iterator should throw";
+
+print(BUGNUMBER + ": " + summary);
+
+let primitives = [
+    1,
+    true,
+    undefined,
+    null,
+    "foo",
+    Symbol.iterator
+];
+
+function f([]) {
+}
+
+for (let primitive of primitives) {
+    let obj = {
+        [Symbol.iterator]() {
+            return primitive;
+        }
+    };
+    assertThrowsInstanceOf(() => {
+        let [] = obj;
+    }, TypeError);
+    assertThrowsInstanceOf(() => {
+        [] = obj;
+    }, TypeError);
+    assertThrowsInstanceOf(() => {
+        f(obj);
+    }, TypeError);
+}
+
+if (typeof reportCompare === "function")
+  reportCompare(0, 0);
diff --git a/js/src/tests/ecma_6/Destructuring/rest-with-trailing-comma.js b/js/src/tests/ecma_6/Destructuring/rest-with-trailing-comma.js
new file mode 100644
index 0000000000..310180e14b
--- /dev/null
+++ b/js/src/tests/ecma_6/Destructuring/rest-with-trailing-comma.js
@@ -0,0 +1,45 @@
+/* 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 invalidSyntax = [
+    "[...r, ]",
+    "[a, ...r, ]",
+    "[a = 0, ...r, ]",
+    "[[], ...r, ]",
+    "[[...r,]]",
+    "[[...r,], ]",
+    "[[...r,], a]",
+];
+
+const validSyntax = [
+    "[, ]",
+    "[a, ]",
+    "[[], ]",
+];
+
+const destructuringForms = [
+    a => `${a} = [];`,
+    a => `var ${a} = [];`,
+    a => `let ${a} = [];`,
+    a => `const ${a} = [];`,
+    a => `(${a}) => {};`,
+    a => `(${a} = []) => {};`,
+    a => `function f(${a}) {}`,
+];
+
+for (let invalid of invalidSyntax) {
+    for (let fn of destructuringForms) {
+        assertThrowsInstanceOf(() => Function(fn(invalid)), SyntaxError);
+    }
+}
+
+for (let invalid of validSyntax) {
+    for (let fn of destructuringForms) {
+        Function(fn(invalid));
+    }
+}
+
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0);
diff --git a/js/src/tests/ecma_6/Destructuring/shell.js b/js/src/tests/ecma_6/Destructuring/shell.js
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/js/src/tests/ecma_6/Destructuring/shell.js
diff --git a/js/src/tests/ecma_6/Destructuring/yield-in-object-destr-function.js b/js/src/tests/ecma_6/Destructuring/yield-in-object-destr-function.js
new file mode 100644
index 0000000000..9f5eed8345
--- /dev/null
+++ b/js/src/tests/ecma_6/Destructuring/yield-in-object-destr-function.js
@@ -0,0 +1,182 @@
+/* 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/. */
+
+
+// Destructuring binding patterns with var.
+(function() {
+    var {a: yield} = {a: "yield-with-name"};
+    assertEq(yield, "yield-with-name");
+
+    var {yield} = {yield: "yield-with-shorthand"};
+    assertEq(yield, "yield-with-shorthand");
+
+    var {yield = 0} = {yield: "yield-with-coverinitname"};
+    assertEq(yield, "yield-with-coverinitname");
+})();
+
+assertThrowsInstanceOf(() => eval(`
+    "use strict";
+    function f() {
+        var {a: yield} = {};
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(`
+    "use strict";
+    function f() {
+        var {yield} = {};
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(`
+    "use strict";
+    function f() {
+        var {yield = 0} = {};
+    }
+`), SyntaxError);
+
+
+// Destructuring binding patterns with let.
+(function(){
+    let {a: yield} = {a: "yield-with-name"};
+    assertEq(yield, "yield-with-name");
+})();
+
+(function() {
+    let {yield} = {yield: "yield-with-shorthand"};
+    assertEq(yield, "yield-with-shorthand");
+})();
+
+(function() {
+    let {yield = 0} = {yield: "yield-with-coverinitname"};
+    assertEq(yield, "yield-with-coverinitname");
+})();
+
+assertThrowsInstanceOf(() => eval(`
+    "use strict";
+    function f() {
+        let {a: yield} = {};
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(`
+    "use strict";
+    function f() {
+        let {yield} = {};
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(`
+    "use strict";
+    function f() {
+        let {yield = 0} = {};
+    }
+`), SyntaxError);
+
+
+// Destructuring binding patterns with const.
+(function() {
+    const {a: yield} = {a: "yield-with-name"};
+    assertEq(yield, "yield-with-name");
+})();
+
+(function() {
+    const {yield} = {yield: "yield-with-shorthand"};
+    assertEq(yield, "yield-with-shorthand");
+})();
+
+(function() {
+    const {yield = 0} = {yield: "yield-with-coverinitname"};
+    assertEq(yield, "yield-with-coverinitname");
+})();
+
+assertThrowsInstanceOf(() => eval(`
+    "use strict";
+    function f() {
+        const {a: yield} = {};
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(`
+    "use strict";
+    function f() {
+        const {yield} = {};
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(`
+    "use strict";
+    function f() {
+        const {yield = 0} = {};
+    }
+`), SyntaxError);
+
+
+// Destructuring binding patterns in parameters.
+(function({a: yield} = {a: "yield-with-name"}) {
+    assertEq(yield, "yield-with-name");
+})();
+
+(function({yield} = {yield: "yield-with-shorthand"}) {
+    assertEq(yield, "yield-with-shorthand");
+})();
+
+(function({yield = 0} = {yield: "yield-with-coverinitname"}) {
+    assertEq(yield, "yield-with-coverinitname");
+})();
+
+assertThrowsInstanceOf(() => eval(`
+    "use strict";
+    function f({a: yield} = {}) { }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(`
+    "use strict";
+    function f({yield} = {}) { }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(`
+    "use strict";
+    function f({yield = 0} = {}) { }
+`), SyntaxError);
+
+
+// Destructuring assignment pattern.
+(function() {
+    var a, yield;
+
+    ({a: yield} = {a: "yield-with-name"});
+    assertEq(yield, "yield-with-name");
+
+    ({yield} = {yield: "yield-with-shorthand"});
+    assertEq(yield, "yield-with-shorthand");
+
+    ({yield = 0} = {yield: "yield-with-coverinitname"});
+    assertEq(yield, "yield-with-coverinitname");
+})();
+
+assertThrowsInstanceOf(() => eval(`
+    "use strict";
+    function f() {
+        ({a: yield} = {});
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(`
+    "use strict";
+    function f() {
+        ({yield} = {});
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(`
+    "use strict";
+    function f() {
+        ({yield = 0} = {});
+    }
+`), SyntaxError);
+
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0, "ok");
diff --git a/js/src/tests/ecma_6/Destructuring/yield-in-object-destr-generator.js b/js/src/tests/ecma_6/Destructuring/yield-in-object-destr-generator.js
new file mode 100644
index 0000000000..4423f8190f
--- /dev/null
+++ b/js/src/tests/ecma_6/Destructuring/yield-in-object-destr-generator.js
@@ -0,0 +1,200 @@
+/* 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/. */
+
+
+// Destructuring binding patterns with var.
+assertThrowsInstanceOf(() => eval(`
+    function* g() {
+        var {a: yield} = {};
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(`
+    function* g() {
+        var {yield} = {};
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(`
+    function* g() {
+        var {yield = 0} = {};
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(`
+    "use strict";
+    function* g() {
+        var {a: yield} = {};
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(`
+    "use strict";
+    function* g() {
+        var {yield} = {};
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(`
+    "use strict";
+    function* g() {
+        var {yield = 0} = {};
+    }
+`), SyntaxError);
+
+
+// Destructuring binding patterns with let.
+assertThrowsInstanceOf(() => eval(`
+    function* g() {
+        let {a: yield} = {};
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(`
+    function* g() {
+        let {yield} = {};
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(`
+    function* g() {
+        let {yield = 0} = {};
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(`
+    "use strict";
+    function* g() {
+        let {a: yield} = {};
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(`
+    "use strict";
+    function* g() {
+        let {yield} = {};
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(`
+    "use strict";
+    function* g() {
+        let {yield = 0} = {};
+    }
+`), SyntaxError);
+
+
+// Destructuring binding patterns with const.
+assertThrowsInstanceOf(() => eval(`
+    function* g() {
+        const {a: yield} = {};
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(`
+    function* g() {
+        const {yield} = {};
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(`
+    function* g() {
+        const {yield = 0} = {};
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(`
+    "use strict";
+    function* g() {
+        const {a: yield} = {};
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(`
+    "use strict";
+    function* g() {
+        const {yield} = {};
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(`
+    "use strict";
+    function* g() {
+        const {yield = 0} = {};
+    }
+`), SyntaxError);
+
+
+// Destructuring binding patterns in parameters.
+assertThrowsInstanceOf(() => eval(`
+    function* g({a: yield} = {}) { }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(`
+    function* g({yield} = {}) { }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(`
+    function* g({yield = 0} = {}) { }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(`
+    "use strict";
+    function* g({a: yield} = {}) { }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(`
+    "use strict";
+    function* g({yield} = {}) { }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(`
+    "use strict";
+    function* g({yield = 0} = {}) { }
+`), SyntaxError);
+
+
+// Destructuring assignment pattern.
+assertThrowsInstanceOf(() => eval(`
+    function* g() {
+        ({a: yield} = {});
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(`
+    function* g() {
+        ({yield} = {});
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(`
+    function* g() {
+        ({yield = 0} = {});
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(`
+    "use strict";
+    function* g() {
+        ({a: yield} = {});
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(`
+    "use strict";
+    function* g() {
+        ({yield} = {});
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(`
+    "use strict";
+    function* g() {
+        ({yield = 0} = {});
+    }
+`), SyntaxError);
+
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0, "ok");
diff --git a/js/src/tests/ecma_6/Destructuring/yield-in-object-destr-script.js b/js/src/tests/ecma_6/Destructuring/yield-in-object-destr-script.js
new file mode 100644
index 0000000000..99b48dd417
--- /dev/null
+++ b/js/src/tests/ecma_6/Destructuring/yield-in-object-destr-script.js
@@ -0,0 +1,123 @@
+/* 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/. */
+
+
+// Destructuring binding patterns with var.
+var {a: yield} = {a: "yield-with-name"};
+assertEq(yield, "yield-with-name");
+
+var {yield} = {yield: "yield-with-shorthand"};
+assertEq(yield, "yield-with-shorthand");
+
+var {yield = 0} = {yield: "yield-with-coverinitname"};
+assertEq(yield, "yield-with-coverinitname");
+
+assertThrowsInstanceOf(() => eval(`
+    "use strict";
+    var {a: yield} = {};
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(`
+    "use strict";
+    var {yield} = {};
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(`
+    "use strict";
+    var {yield = 0} = {};
+`), SyntaxError);
+
+
+// Destructuring binding patterns with let.
+{
+    let {a: yield} = {a: "yield-with-name"};
+    assertEq(yield, "yield-with-name");
+}
+
+{
+    let {yield} = {yield: "yield-with-shorthand"};
+    assertEq(yield, "yield-with-shorthand");
+}
+
+{
+    let {yield = 0} = {yield: "yield-with-coverinitname"};
+    assertEq(yield, "yield-with-coverinitname");
+}
+
+assertThrowsInstanceOf(() => eval(`
+    "use strict";
+    let {a: yield} = {};
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(`
+    "use strict";
+    let {yield} = {};
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(`
+    "use strict";
+    let {yield = 0} = {};
+`), SyntaxError);
+
+
+// Destructuring binding patterns with const.
+{
+    const {a: yield} = {a: "yield-with-name"};
+    assertEq(yield, "yield-with-name");
+}
+
+{
+    const {yield} = {yield: "yield-with-shorthand"};
+    assertEq(yield, "yield-with-shorthand");
+}
+
+{
+    const {yield = 0} = {yield: "yield-with-coverinitname"};
+    assertEq(yield, "yield-with-coverinitname");
+}
+
+assertThrowsInstanceOf(() => eval(`
+    "use strict";
+    const {a: yield} = {};
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(`
+    "use strict";
+    const {yield} = {};
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(`
+    "use strict";
+    const {yield = 0} = {};
+`), SyntaxError);
+
+
+// Destructuring assignment pattern.
+({a: yield} = {a: "yield-with-name"});
+assertEq(yield, "yield-with-name");
+
+({yield} = {yield: "yield-with-shorthand"});
+assertEq(yield, "yield-with-shorthand");
+
+({yield = 0} = {yield: "yield-with-coverinitname"});
+assertEq(yield, "yield-with-coverinitname");
+
+assertThrowsInstanceOf(() => eval(`
+    "use strict";
+    ({a: yield} = {});
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(`
+    "use strict";
+    ({yield} = {});
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(`
+    "use strict";
+    ({yield = 0} = {});
+`), SyntaxError);
+
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0, "ok");
diff --git a/js/src/tests/ecma_6/Destructuring/yield-with-escape-in-object-destr-function.js b/js/src/tests/ecma_6/Destructuring/yield-with-escape-in-object-destr-function.js
new file mode 100644
index 0000000000..349badeaf7
--- /dev/null
+++ b/js/src/tests/ecma_6/Destructuring/yield-with-escape-in-object-destr-function.js
@@ -0,0 +1,182 @@
+/* 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/. */
+
+
+// Destructuring binding patterns with var.
+(function() {
+    var {a: yi\u0065ld} = {a: "yield-with-name"};
+    assertEq(yield, "yield-with-name");
+
+    var {yi\u0065ld} = {yield: "yield-with-shorthand"};
+    assertEq(yield, "yield-with-shorthand");
+
+    var {yi\u0065ld = 0} = {yield: "yield-with-coverinitname"};
+    assertEq(yield, "yield-with-coverinitname");
+})();
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    "use strict";
+    function f() {
+        var {a: yi\u0065ld} = {};
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    "use strict";
+    function f() {
+        var {yi\u0065ld} = {};
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    "use strict";
+    function f() {
+        var {yi\u0065ld = 0} = {};
+    }
+`), SyntaxError);
+
+
+// Destructuring binding patterns with let.
+(function(){
+    let {a: yi\u0065ld} = {a: "yield-with-name"};
+    assertEq(yield, "yield-with-name");
+})();
+
+(function() {
+    let {yi\u0065ld} = {yield: "yield-with-shorthand"};
+    assertEq(yield, "yield-with-shorthand");
+})();
+
+(function() {
+    let {yi\u0065ld = 0} = {yield: "yield-with-coverinitname"};
+    assertEq(yield, "yield-with-coverinitname");
+})();
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    "use strict";
+    function f() {
+        let {a: yi\u0065ld} = {};
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    "use strict";
+    function f() {
+        let {yi\u0065ld} = {};
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    "use strict";
+    function f() {
+        let {yi\u0065ld = 0} = {};
+    }
+`), SyntaxError);
+
+
+// Destructuring binding patterns with const.
+(function() {
+    const {a: yi\u0065ld} = {a: "yield-with-name"};
+    assertEq(yield, "yield-with-name");
+})();
+
+(function() {
+    const {yi\u0065ld} = {yield: "yield-with-shorthand"};
+    assertEq(yield, "yield-with-shorthand");
+})();
+
+(function() {
+    const {yi\u0065ld = 0} = {yield: "yield-with-coverinitname"};
+    assertEq(yield, "yield-with-coverinitname");
+})();
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    "use strict";
+    function f() {
+        const {a: yi\u0065ld} = {};
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    "use strict";
+    function f() {
+        const {yi\u0065ld} = {};
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    "use strict";
+    function f() {
+        const {yi\u0065ld = 0} = {};
+    }
+`), SyntaxError);
+
+
+// Destructuring binding patterns in parameters.
+(function({a: yi\u0065ld} = {a: "yield-with-name"}) {
+    assertEq(yield, "yield-with-name");
+})();
+
+(function({yi\u0065ld} = {yield: "yield-with-shorthand"}) {
+    assertEq(yield, "yield-with-shorthand");
+})();
+
+(function({yi\u0065ld = 0} = {yield: "yield-with-coverinitname"}) {
+    assertEq(yield, "yield-with-coverinitname");
+})();
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    "use strict";
+    function f({a: yi\u0065ld} = {}) { }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    "use strict";
+    function f({yi\u0065ld} = {}) { }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    "use strict";
+    function f({yi\u0065ld = 0} = {}) { }
+`), SyntaxError);
+
+
+// Destructuring assignment pattern.
+(function() {
+    var a, yield;
+
+    ({a: yi\u0065ld} = {a: "yield-with-name"});
+    assertEq(yield, "yield-with-name");
+
+    ({yi\u0065ld} = {yield: "yield-with-shorthand"});
+    assertEq(yield, "yield-with-shorthand");
+
+    ({yi\u0065ld = 0} = {yield: "yield-with-coverinitname"});
+    assertEq(yield, "yield-with-coverinitname");
+})();
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    "use strict";
+    function f() {
+        ({a: yi\u0065ld} = {});
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    "use strict";
+    function f() {
+        ({yi\u0065ld} = {});
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    "use strict";
+    function f() {
+        ({yi\u0065ld = 0} = {});
+    }
+`), SyntaxError);
+
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0, "ok");
diff --git a/js/src/tests/ecma_6/Destructuring/yield-with-escape-in-object-destr-generator.js b/js/src/tests/ecma_6/Destructuring/yield-with-escape-in-object-destr-generator.js
new file mode 100644
index 0000000000..faa3563914
--- /dev/null
+++ b/js/src/tests/ecma_6/Destructuring/yield-with-escape-in-object-destr-generator.js
@@ -0,0 +1,200 @@
+/* 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/. */
+
+
+// Destructuring binding patterns with var.
+assertThrowsInstanceOf(() => eval(String.raw`
+    function* g() {
+        var {a: yi\u0065ld} = {};
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    function* g() {
+        var {yi\u0065ld} = {};
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    function* g() {
+        var {yi\u0065ld = 0} = {};
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    "use strict";
+    function* g() {
+        var {a: yi\u0065ld} = {};
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    "use strict";
+    function* g() {
+        var {yi\u0065ld} = {};
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    "use strict";
+    function* g() {
+        var {yi\u0065ld = 0} = {};
+    }
+`), SyntaxError);
+
+
+// Destructuring binding patterns with let.
+assertThrowsInstanceOf(() => eval(String.raw`
+    function* g() {
+        let {a: yi\u0065ld} = {};
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    function* g() {
+        let {yi\u0065ld} = {};
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    function* g() {
+        let {yi\u0065ld = 0} = {};
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    "use strict";
+    function* g() {
+        let {a: yi\u0065ld} = {};
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    "use strict";
+    function* g() {
+        let {yi\u0065ld} = {};
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    "use strict";
+    function* g() {
+        let {yi\u0065ld = 0} = {};
+    }
+`), SyntaxError);
+
+
+// Destructuring binding patterns with const.
+assertThrowsInstanceOf(() => eval(String.raw`
+    function* g() {
+        const {a: yi\u0065ld} = {};
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    function* g() {
+        const {yi\u0065ld} = {};
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    function* g() {
+        const {yi\u0065ld = 0} = {};
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    "use strict";
+    function* g() {
+        const {a: yi\u0065ld} = {};
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    "use strict";
+    function* g() {
+        const {yi\u0065ld} = {};
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    "use strict";
+    function* g() {
+        const {yi\u0065ld = 0} = {};
+    }
+`), SyntaxError);
+
+
+// Destructuring binding patterns in parameters.
+assertThrowsInstanceOf(() => eval(String.raw`
+    function* g({a: yi\u0065ld} = {}) { }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    function* g({yi\u0065ld} = {}) { }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    function* g({yi\u0065ld = 0} = {}) { }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    "use strict";
+    function* g({a: yi\u0065ld} = {}) { }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    "use strict";
+    function* g({yi\u0065ld} = {}) { }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    "use strict";
+    function* g({yi\u0065ld = 0} = {}) { }
+`), SyntaxError);
+
+
+// Destructuring assignment pattern.
+assertThrowsInstanceOf(() => eval(String.raw`
+    function* g() {
+        ({a: yi\u0065ld} = {});
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    function* g() {
+        ({yi\u0065ld} = {});
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    function* g() {
+        ({yi\u0065ld = 0} = {});
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    "use strict";
+    function* g() {
+        ({a: yi\u0065ld} = {});
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    "use strict";
+    function* g() {
+        ({yi\u0065ld} = {});
+    }
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    "use strict";
+    function* g() {
+        ({yi\u0065ld = 0} = {});
+    }
+`), SyntaxError);
+
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0, "ok");
diff --git a/js/src/tests/ecma_6/Destructuring/yield-with-escape-in-object-destr-script.js b/js/src/tests/ecma_6/Destructuring/yield-with-escape-in-object-destr-script.js
new file mode 100644
index 0000000000..65352a66cf
--- /dev/null
+++ b/js/src/tests/ecma_6/Destructuring/yield-with-escape-in-object-destr-script.js
@@ -0,0 +1,123 @@
+/* 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/. */
+
+
+// Destructuring binding patterns with var.
+var {a: yi\u0065ld} = {a: "yield-with-name"};
+assertEq(yield, "yield-with-name");
+
+var {yi\u0065ld} = {yield: "yield-with-shorthand"};
+assertEq(yield, "yield-with-shorthand");
+
+var {yi\u0065ld = 0} = {yield: "yield-with-coverinitname"};
+assertEq(yield, "yield-with-coverinitname");
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    "use strict";
+    var {a: yi\u0065ld} = {};
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    "use strict";
+    var {yi\u0065ld} = {};
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    "use strict";
+    var {yi\u0065ld = 0} = {};
+`), SyntaxError);
+
+
+// Destructuring binding patterns with let.
+{
+    let {a: yi\u0065ld} = {a: "yield-with-name"};
+    assertEq(yield, "yield-with-name");
+}
+
+{
+    let {yi\u0065ld} = {yield: "yield-with-shorthand"};
+    assertEq(yield, "yield-with-shorthand");
+}
+
+{
+    let {yi\u0065ld = 0} = {yield: "yield-with-coverinitname"};
+    assertEq(yield, "yield-with-coverinitname");
+}
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    "use strict";
+    let {a: yi\u0065ld} = {};
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    "use strict";
+    let {yi\u0065ld} = {};
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    "use strict";
+    let {yi\u0065ld = 0} = {};
+`), SyntaxError);
+
+
+// Destructuring binding patterns with const.
+{
+    const {a: yi\u0065ld} = {a: "yield-with-name"};
+    assertEq(yield, "yield-with-name");
+}
+
+{
+    const {yi\u0065ld} = {yield: "yield-with-shorthand"};
+    assertEq(yield, "yield-with-shorthand");
+}
+
+{
+    const {yi\u0065ld = 0} = {yield: "yield-with-coverinitname"};
+    assertEq(yield, "yield-with-coverinitname");
+}
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    "use strict";
+    const {a: yi\u0065ld} = {};
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    "use strict";
+    const {yi\u0065ld} = {};
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    "use strict";
+    const {yi\u0065ld = 0} = {};
+`), SyntaxError);
+
+
+// Destructuring assignment pattern.
+({a: yi\u0065ld} = {a: "yield-with-name"});
+assertEq(yield, "yield-with-name");
+
+({yi\u0065ld} = {yield: "yield-with-shorthand"});
+assertEq(yield, "yield-with-shorthand");
+
+({yi\u0065ld = 0} = {yield: "yield-with-coverinitname"});
+assertEq(yield, "yield-with-coverinitname");
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    "use strict";
+    ({a: yi\u0065ld} = {});
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    "use strict";
+    ({yi\u0065ld} = {});
+`), SyntaxError);
+
+assertThrowsInstanceOf(() => eval(String.raw`
+    "use strict";
+    ({yi\u0065ld = 0} = {});
+`), SyntaxError);
+
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0, "ok");