User-Agent: Mozilla/5.0 (X11; Linux i686; rv:2.0) Gecko/20100101 Firefox/4.0 Build Identifier: FF4RC1 Test case: -------------- var globalObject = Function("return this;").call(); window === globalObject; -------------- true in latest Chrome and Opera. false in FF4RC1. I have noticed it because Object.getOwnPropertyNames gave different results. I have noticed it after noticing that Test262 Test 126.96.36.199-4-1 failed. The problem is that Error doesn't show up on as own keys. However, it's weird because while testing on the WebConsole several times, I have reproduced the non-appearance of all native built-in Errors, but at some point, they were listed. Reproducible: Always
For the record, "Function("return this;").call();" is a way to retrieve the global object in both non/strict mode.
You're testing this in the web console, aren't you? In the web console |this| is not the same thing as |window|. This should not cause any Test262 tests to fail unless you're running them in the web console...
And in particular, in a web page the script you quote returns true, as you can check.
I have indeed tested on the WebConsole. Regardless, the test was run and failed in the normal environment (from http://test262.ecmascript.org/). As said, at some point, on the web console. in neither of both object were present native Error built-in. However, this isn't consistent. At some point, they re-appeared.
Should I report another bug then? You seem to know the cause, is there already a bug for this? I change status as 'invalid' since this bug was due to the fact I didn't know about the this keyword in web console. I add a dev-doc-needed keyword too. And I changed the title to make it more easily searchable.
Jeff promised to file a bug about the standard class stuff, since he can describe it better than I can. As a web console bug this is invalid, yes. The idea is to allow the user to define variables in the web console without polluting the page namespace.
I filed bug 641655 on the standard class stuff.
Added a note to: https://developer.mozilla.org/en/Using_the_Web_Console#Basic_usage