Bug 1309 non-extensible objects have immutable __Proto__

Bug 1309 non-extensible objects have immutable __Proto__


BUG=
TEST=

[Peter Hallam, 2011-04-06 13:34:01]

8.6.2 Object Internal Methods

...
In addition, if [[Extensible]] is false the value of the [[Class]] and
[[Prototype]] internal properties of the object may not be modified. Once the
value of an [[Extensible]] internal property has been set to false it may not be
subsequently changed to true.

NOTE	This specification defines no ECMAScript language operators or built-in
functions that permit a program to modify an object’s [[Class]] or [[Prototype]]
internal properties or to change the value of [[Extensible]] from false to true.
Implementation specific extensions that modify [[Class]], [[Prototype]] or
[[Extensible]] must not violate the invariants defined in the preceding
paragraph.

[Mads Ager (chromium), 2011-04-06 14:02:12]

LGTM

http://codereview.chromium.org/6800014/diff/1001/test/mjsunit/regress/regress...
File test/mjsunit/regress/regress-1309.js (right):

http://codereview.chromium.org/6800014/diff/1001/test/mjsunit/regress/regress...
test/mjsunit/regress/regress-1309.js:1: // Copyright 2010 the V8 project
authors. All rights reserved.
2011

[Peter Hallam, 2011-04-06 16:27:06]

Landed in http://codereview.chromium.org/6800018/

On 2011/04/06 14:02:12, Mads Ager wrote:
> LGTM
> 
>
http://codereview.chromium.org/6800014/diff/1001/test/mjsunit/regress/regress...
> File test/mjsunit/regress/regress-1309.js (right):
> 
>
http://codereview.chromium.org/6800014/diff/1001/test/mjsunit/regress/regress...
> test/mjsunit/regress/regress-1309.js:1: // Copyright 2010 the V8 project
> authors. All rights reserved.
> 2011