Do not implicitly convert non-object receivers for strict mode functions.

src/array.js

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1035 matching lines @@
   // Pull out the length so that modifications to the length in the
   // loop will not affect the looping and side effects are visible.
   var array = ToObject(this);
   var length = ToUint32(array.length);
 
   if (!IS_SPEC_FUNCTION(f)) {
     throw MakeTypeError('called_non_callable', [ f ]);
   }
   if (IS_NULL_OR_UNDEFINED(receiver)) {
     receiver = %GetDefaultReceiver(f) || receiver;
-  } else if (!IS_SPEC_OBJECT(receiver)) {
+  } else if (!IS_SPEC_OBJECT(receiver) && %IsClassicModeFunction(f)) {
     receiver = ToObject(receiver);
   }
 
   var result = new $Array();
   var accumulator = new InternalArray();
   var accumulator_length = 0;
   if (%DebugCallbackSupportsStepping(f)) {
     for (var i = 0; i < length; i++) {
       if (i in array) {
         var element = array[i];
@@ skipping 30 matching lines @@
   // Pull out the length so that modifications to the length in the
   // loop will not affect the looping and side effects are visible.
   var array = ToObject(this);
   var length = TO_UINT32(array.length);
 
   if (!IS_SPEC_FUNCTION(f)) {
     throw MakeTypeError('called_non_callable', [ f ]);
   }
   if (IS_NULL_OR_UNDEFINED(receiver)) {
     receiver = %GetDefaultReceiver(f) || receiver;
-  } else if (!IS_SPEC_OBJECT(receiver)) {
+  } else if (!IS_SPEC_OBJECT(receiver) && %IsClassicModeFunction(f)) {
     receiver = ToObject(receiver);
   }
+
   if (%DebugCallbackSupportsStepping(f)) {
     for (var i = 0; i < length; i++) {
       if (i in array) {
         var element = array[i];
         // Prepare break slots for debugger step in.
         %DebugPrepareStepInIfStepping(f);
         %_CallFunction(receiver, element, i, array, f);
       }
     }
   } else {
@@ skipping 20 matching lines @@
   // Pull out the length so that modifications to the length in the
   // loop will not affect the looping and side effects are visible.
   var array = ToObject(this);
   var length = TO_UINT32(array.length);
 
   if (!IS_SPEC_FUNCTION(f)) {
     throw MakeTypeError('called_non_callable', [ f ]);
   }
   if (IS_NULL_OR_UNDEFINED(receiver)) {
     receiver = %GetDefaultReceiver(f) || receiver;
-  } else if (!IS_SPEC_OBJECT(receiver)) {
+  } else if (!IS_SPEC_OBJECT(receiver) && %IsClassicModeFunction(f)) {
     receiver = ToObject(receiver);
   }
 
   if (%DebugCallbackSupportsStepping(f)) {
     for (var i = 0; i < length; i++) {
       if (i in array) {
         var element = array[i];
         // Prepare break slots for debugger step in.
         %DebugPrepareStepInIfStepping(f);
         if (%_CallFunction(receiver, element, i, array, f)) return true;
@@ skipping 22 matching lines @@
   // Pull out the length so that modifications to the length in the
   // loop will not affect the looping and side effects are visible.
   var array = ToObject(this);
   var length = TO_UINT32(array.length);
 
   if (!IS_SPEC_FUNCTION(f)) {
     throw MakeTypeError('called_non_callable', [ f ]);
   }
   if (IS_NULL_OR_UNDEFINED(receiver)) {
     receiver = %GetDefaultReceiver(f) || receiver;
-  } else if (!IS_SPEC_OBJECT(receiver)) {
+  } else if (!IS_SPEC_OBJECT(receiver) && %IsClassicModeFunction(f)) {
     receiver = ToObject(receiver);
   }
 
   if (%DebugCallbackSupportsStepping(f)) {
     for (var i = 0; i < length; i++) {
       if (i in array) {
         var element = array[i];
         // Prepare break slots for debugger step in.
         %DebugPrepareStepInIfStepping(f);
         if (!%_CallFunction(receiver, element, i, array, f)) return false;
@@ skipping 21 matching lines @@
   // Pull out the length so that modifications to the length in the
   // loop will not affect the looping and side effects are visible.
   var array = ToObject(this);
   var length = TO_UINT32(array.length);
 
   if (!IS_SPEC_FUNCTION(f)) {
     throw MakeTypeError('called_non_callable', [ f ]);
   }
   if (IS_NULL_OR_UNDEFINED(receiver)) {
     receiver = %GetDefaultReceiver(f) || receiver;
-  } else if (!IS_SPEC_OBJECT(receiver)) {
+  } else if (!IS_SPEC_OBJECT(receiver) && %IsClassicModeFunction(f)) {
     receiver = ToObject(receiver);
   }
 
   var result = new $Array();
   var accumulator = new InternalArray(length);
   if (%DebugCallbackSupportsStepping(f)) {
     for (var i = 0; i < length; i++) {
       if (i in array) {
         var element = array[i];
         // Prepare break slots for debugger step in.
@@ skipping 316 matching lines @@
   ));
 
   SetUpLockedPrototype(InternalPackedArray, $Array(), $Array(
     "join", getFunction("join", ArrayJoin),
     "pop", getFunction("pop", ArrayPop),
     "push", getFunction("push", ArrayPush)
   ));
 }
 
 SetUpArray();