Array.prototype.{every, filter, find, findIndex, forEach, map, some}: Use fresh primitive wrapper f…

src/collection.js

Index: src/collection.js
diff --git a/src/collection.js b/src/collection.js
index 0027bd732041f94ccf81dbfe3256c4f75d680c5a..7d185d9c34191c14c276dc0520627cff86b6ebe5 100644
--- a/src/collection.js
+++ b/src/collection.js
@@ -105,6 +105,12 @@ function SetForEach(f, receiver) {
   if (!IS_SPEC_FUNCTION(f)) {
     throw MakeTypeError('called_non_callable', [f]);
   }
+  var needs_wrapper = false;
+  if (IS_NULL_OR_UNDEFINED(receiver)) {
+    receiver = %GetDefaultReceiver(f) || receiver;
+  } else {
+    needs_wrapper = SHOULD_CREATE_WRAPPER(f, receiver);
+  }
 
   var iterator = new SetIterator(this, ITERATOR_KIND_VALUES);
   var key;
@@ -113,7 +119,8 @@ function SetForEach(f, receiver) {
   while (%SetIteratorNext(iterator, value_array)) {
     if (stepping) %DebugPrepareStepInIfStepping(f);
     key = value_array[0];
-    %_CallFunction(receiver, key, key, this, f);
+    var new_receiver = needs_wrapper ? ToObject(receiver) : receiver;
+    %_CallFunction(new_receiver, key, key, this, f);
   }
 }
 
@@ -249,13 +256,20 @@ function MapForEach(f, receiver) {
   if (!IS_SPEC_FUNCTION(f)) {
     throw MakeTypeError('called_non_callable', [f]);
   }
+  var needs_wrapper = false;
+  if (IS_NULL_OR_UNDEFINED(receiver)) {
+    receiver = %GetDefaultReceiver(f) || receiver;
+  } else {
+    needs_wrapper = SHOULD_CREATE_WRAPPER(f, receiver);
+  }
 
   var iterator = new MapIterator(this, ITERATOR_KIND_ENTRIES);
   var stepping = DEBUG_IS_ACTIVE && %DebugCallbackSupportsStepping(f);
   var value_array = [UNDEFINED, UNDEFINED];
   while (%MapIteratorNext(iterator, value_array)) {
     if (stepping) %DebugPrepareStepInIfStepping(f);
-    %_CallFunction(receiver, value_array[1], value_array[0], this, f);
+    var new_receiver = needs_wrapper ? ToObject(receiver) : receiver;
+    %_CallFunction(new_receiver, value_array[1], value_array[0], this, f);
   }
 }