Bug 36972 – fast/canvas/webgl/index-validation.html failed randomly if antialias is on

• Component: WebGL
• Status: RESOLVED FIXED

[Zhenyao Mo]

See https://bugs.webkit.org/show_bug.cgi?id=33416

This random failure might be caused by a hardware/driver bug, likely some unwanted competition is going on.

[Zhenyao Mo]

Observation (not sure if it's of any value): I used to be able to reproduce this failure on my Mac the first run after I just rebuilt the webkit, but not any later runs; right now I am unable to reproduce it on my machine anymore.

[Zhenyao Mo]

Another report of the same issue.

http://lists.apple.com/archives/mac-opengl/2009/Dec/msg00010.html

[Eric Seidel (no email)]

If this is a bug in Mac OS X software, you need to report it at http://radar.apple.com/ to have it looked at.  This tracker is only for WebKit bugs.

[Zhenyao Mo]

Yes, we will file a bug there.

[Zhenyao Mo]

Seems like the issue is not hardware/driver bug, but the uninitialized variables in Mac port.

See https://bugs.webkit.org/show_bug.cgi?id=36908

Going to turn on anti-alias / stencil again as default canvas attributes for tests.

[Zhenyao Mo]

Created attachment 54012 [details]
patch

Anti-alias and stencil were turned off from default canvas attribute set when we try to pin-point the cause of these random failures; now seems like they are not the cause, we turn them back on.

[Eric Seidel (no email)]

Comment on attachment 54012 [details]
patch

OK.

[WebKit Commit Bot]

Comment on attachment 54012 [details]
patch

Clearing flags on attachment: 54012

Committed r58090: <http://trac.webkit.org/changeset/58090>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.