Allow eval in detached contexts

src/v8natives.js

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This file relies on the fact that the following declarations have been made
 // in runtime.js:
 // var $Object = global.Object;
 // var $Boolean = global.Boolean;
 // var $Number = global.Number;
 // var $Function = global.Function;
@@ skipping 145 matching lines @@
 function GlobalParseFloat(string) {
   string = TO_STRING_INLINE(string);
   if (%_HasCachedArrayIndex(string)) return %_GetCachedArrayIndex(string);
   return %StringParseFloat(string);
 }
 
 
 function GlobalEval(x) {
   if (!IS_STRING(x)) return x;
 
-  // For consistency with JSC we require the global object passed to
-  // eval to be the global object from which 'eval' originated. This
-  // is not mandated by the spec.
-  // We only throw if the global has been detached, since we need the
-  // receiver as this-value for the call.
-  if (!%IsAttachedGlobal(global)) {
-    throw new $EvalError('The "this" value passed to eval must ' +
-                         'be the global object from which eval originated');
-  }
-
   var global_proxy = %GlobalProxy(global);
 
   var f = %CompileString(x, false, 0);
   if (!IS_FUNCTION(f)) return f;
 
   return %_CallFunction(global_proxy, f);
 }
 
 
 // ----------------------------------------------------------------------------
@@ skipping 1714 matching lines @@
   }
   if (!IS_SPEC_FUNCTION(method)) {
     throw MakeTypeError('not_iterable', [obj]);
   }
   var iterator = %_CallFunction(obj, method);
   if (!IS_SPEC_OBJECT(iterator)) {
     throw MakeTypeError('not_an_iterator', [iterator]);
   }
   return iterator;
 }