Fix order of OwnProperty check for rest parameters.

This was a small mistake when converting from the `hasOwn()` function format (swapped parameters). Fixing this properly makes rest parameters exclude the parameters that are defined (which is the whole point of `...rest`

1 files changed, 1 insertions, 1 deletions

diff --git a/js/src/builtin/Utilities.js b/js/src/builtin/Utilities.js
index ec5c883365..d5f233d050 100644
--- a/js/src/builtin/Utilities.js
+++ b/js/src/builtin/Utilities.js
@@ -254,7 +254,7 @@ function CopyDataProperties(target, source, excluded) {
 
         // We abbreviate this by calling propertyIsEnumerable which is faster
         // and returns false for not defined properties.
-        if (!callFunction(std_Object_hasOwnProperty, key, excluded) && callFunction(std_Object_propertyIsEnumerable, source, key))
+        if (!callFunction(std_Object_hasOwnProperty, excluded, key) && callFunction(std_Object_propertyIsEnumerable, source, key))
             _DefineDataProperty(target, key, source[key]);
     }