Bug 36972 - fast/canvas/webgl/index-validation.html failed randomly if antialias is on
Summary: fast/canvas/webgl/index-validation.html failed randomly if antialias is on
Alias: None
Product: WebKit
Classification: Unclassified
Component: WebGL (show other bugs)
Version: 528+ (Nightly build)
Hardware: PC OS X 10.5
: P2 Normal
Assignee: Zhenyao Mo
Depends on:
Reported: 2010-04-01 10:39 PDT by Zhenyao Mo
Modified: 2010-04-22 05:28 PDT (History)
4 users (show)

See Also:

patch (1.36 KB, patch)
2010-04-21 18:29 PDT, Zhenyao Mo
no flags Details | Formatted Diff | Diff

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Description Zhenyao Mo 2010-04-01 10:39:22 PDT
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.
Comment 1 Zhenyao Mo 2010-04-01 10:41:43 PDT
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.
Comment 2 Zhenyao Mo 2010-04-01 11:39:28 PDT
Another report of the same issue.

Comment 3 Eric Seidel (no email) 2010-04-07 13:21:12 PDT
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.
Comment 4 Zhenyao Mo 2010-04-07 13:42:38 PDT
Yes, we will file a bug there.
Comment 5 Zhenyao Mo 2010-04-21 18:25:42 PDT
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.
Comment 6 Zhenyao Mo 2010-04-21 18:29:00 PDT
Created attachment 54012 [details]

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.
Comment 7 Eric Seidel (no email) 2010-04-21 18:30:12 PDT
Comment on attachment 54012 [details]

Comment 8 WebKit Commit Bot 2010-04-22 05:28:53 PDT
Comment on attachment 54012 [details]

Clearing flags on attachment: 54012

Committed r58090: <http://trac.webkit.org/changeset/58090>
Comment 9 WebKit Commit Bot 2010-04-22 05:28:59 PDT
All reviewed patches have been landed.  Closing bug.