933513 - Assigning to window.performance throws "value is not a non-null object" (breaks http://google.com/nexus/5/)

Status: VERIFIED FIXED

(Core :: DOM: Core & HTML, defect)

Description

[John Schoenick [:johns]]

Doing:
> window.performance = window.performance || {}

Throws after bug 918345:

> TypeError: value is not a non-null object

I don't know if is proper per spec, but googling reveals many tutorials and stack overflow responses suggesting this or a similar assignment (e.g. window.performance = window.mozPerformance || window.performance || ...).

Comment 1

[Kyle Huey (Exited; not receiving bugmail, old account, do not use)]

This should be fixed by bug 932322, I think.

Comment 2

[Boris Zbarsky [:bzbarsky]]

No, but it should be fixed by bug 932320.

Comment 3

[Peter Van der Beken [:peterv]]

Just to be clear, this is happening in the Web Console?

Comment 4

[Boris Zbarsky [:bzbarsky]]

No, this happens in a web page too, because "window" is a proxy.

Comment 5

[bhavana bajaj [:bajaj]]

Remove the tracking nom as bug 932320 is already tracking and this is a dependency on it.

Comment 6

[John Schoenick [:johns]]

Bug 932320 fixes this, and the nexus site works again \o/

Comment 7

[John Schoenick [:johns]]

Didn't mean to re-set tracking

Comment 8

[John Schoenick [:johns]]

... nor was this uplifted, but that's tracked in 932320

Comment 9

[Ioana (away)]

Reproduce the "value is not a non-null object" error with Firefox 28.0a1 on http://google.com/nexus/5/. Verified as fixed with Firefox 28.0b4 on windows 7 64bit, Mac OS X 10.8.5 and Ubuntu 13.04 32bit.