736477 - GCC 4.7.0: WebGL: objects not rendered most of the time

Status: RESOLVED WORKSFORME

(Firefox :: Untriaged, defect)

Description

[Stefan]

User Agent:  

Steps to reproduce:

1. Compile m-c d0d13f09be44 with gcc (GCC) 4.7.0 20120314 (prerelease)
2. Open http://learningwebgl.com/lessons/lesson03/index.html


Actual results:

2. For fractions of a second the two objects appear and then the square becomes black. From time to time the objects reappear in order to vanish again quickly.


Expected results:

2. Display the objects all the time.

Comment 1

[Jan Alexander Steffens [:heftig]]

I can confirm this. Compiling Firefox using gcc 4.7 makes it misrender WebGL.
http://pkgbuild.com/~heftig/screenshots/webgl.png

Affects at least Firefox 12 and 13 as well as Aurora 14 and 15.

Comment 2

[Stefan]

WebGL in m-c 85abf12e5c83 if compiled with the brand new GCC 4.7.1 works.

Comment 3

[Yajo]

Seems to affect Fedora 17 https://bugzilla.redhat.com/show_bug.cgi?id=830017

Comment 4

[[:Aleksej]]

Per https://bugzilla.redhat.com/show_bug.cgi?id=830017#c24, should this be closed as WORKSFORME now?

Comment 5

[Jan Alexander Steffens [:heftig]]

Yeah, I think so. The issue has vanished for us. Currently using Firefox 23 and GCC 4.8.1.

Comment 6

[[:Aleksej]]

Thanks.

Comment 7

[Stefan]

OK.