Bug 75575
| Summary: | Improve variable resolution order on window | ||
|---|---|---|---|
| Product: | WebKit | Reporter: | Ojan Vafai <ojan> |
| Component: | JavaScriptCore | Assignee: | Nobody <webkit-unassigned> |
| Status: | NEW | ||
| Severity: | Normal | CC: | ap, arv, barraclough, fpizlo, gregsimon, oliver, sam |
| Priority: | P2 | ||
| Version: | 528+ (Nightly build) | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| URL: | https://bugs.ecmascript.org/show_bug.cgi?id=78 | ||
| Bug Depends on: | 49739, 84247, 85001 | ||
| Bug Blocks: | |||
Ojan Vafai
WebKit's variable resolution order on window has caused a number of bugs for the Closure Compiler. See http://code.google.com/p/chromium/issues/detail?id=80591 for more details of the case that keeps biting them.
Also see http://lists.w3.org/Archives/Public/public-webapps/2011AprJun/0389.html and http://lists.w3.org/Archives/Public/public-script-coord/2012JanMar/0010.html for discussion on standardizing this. The discussion is not quite done, but it seems likely the WebKit/JSC/V8 will need to change.
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Greg Simon
I looked at a CL for this bug and yes it does require a v8 change for v8-based webkit browsers.
Ojan Vafai
OK. This is resolved now. http://lists.w3.org/Archives/Public/public-script-coord/2012JanMar/0104.html
Erik Arvidsson
V8 has fixed this (behind a flag) but since all WebIDL attributes are implemented as own properties on the global object we need to fix bug 49739 to get non configurable properties to work correctly.
Erik Arvidsson
The ES5.2 behavior is at https://bugs.ecmascript.org/show_bug.cgi?id=78
Erik Arvidsson
Chrome is now shipping with this behavior.