[Webkit-unassigned] [Bug 89529] New: [Chromium][Mac] Assertion failure in null_audio_sink.cc running WebGL video layout test on 10.5 debug bots

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=89529

           Summary: [Chromium][Mac] Assertion failure in
                    null_audio_sink.cc running WebGL video layout test on
                    10.5 debug bots
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Media Elements
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: kbr at google.com
                CC: zmo at google.com, vrk at chromium.org,
                    fischman at chromium.org


The assertion failure below is seen in the Chromium side code while running fast/canvas/webgl/tex-image-and-sub-image-2d-with-video.html on the Webkit Mac10.5 (dbg)(1) bot. See:

http://build.chromium.org/p/chromium.webkit/builders/Webkit%20Mac10.5%20%28dbg%29%281%29/builds/8292

Flakiness dashboard:

http://test-results.appspot.com/dashboards/flakiness_dashboard.html#tests=fast%2Fcanvas%2Fwebgl%2Ftex-image-and-sub-image-2d-with-video.html

It looks like this assertion failure happens periodically and wasn't triggered by any particular change. It isn't reproducible on my 10.6 machine.


crash log for DumpRenderTree (pid 1564):
STDOUT: <empty>
STDERR: [1564:-1186639872:1311434366506:FATAL:null_audio_sink.cc(97)] Check failed: playback_rate_ > 0.0f (0 vs. 0)
STDERR: Backtrace:
STDERR:     0   DumpRenderTree                      0x6c1ede7f start + 8672871
STDERR:     1   DumpRenderTree                      0x6c1ede1b start + 8672771
STDERR:     2   DumpRenderTree                      0x6c23d38c start + 8997748
STDERR:     3   DumpRenderTree                      0x6c23be7b start + 8992355
STDERR:     4   DumpRenderTree                      0x6f70e5d4 start + 64380348
STDERR:     5   DumpRenderTree                      0x6f7107d4 start + 64389052
STDERR:     6   DumpRenderTree                      0x6f7106d3 start + 64388795
STDERR:     7   DumpRenderTree                      0x6f71061c start + 64388612
STDERR:     8   DumpRenderTree                      0x6c256e3b start + 9102883
STDERR:     9   DumpRenderTree                      0x6c254378 start + 9091936
STDERR:     10  DumpRenderTree                      0x6c254721 start + 9092873
STDERR:     11  DumpRenderTree                      0x6c254cd8 start + 9094336
STDERR:     12  DumpRenderTree                      0x6c2665e5 start + 9166285
STDERR:     13  DumpRenderTree                      0x6c253cd2 start + 9090234
STDERR:     14  DumpRenderTree                      0x6c252feb start + 9086931
STDERR:     15  DumpRenderTree                      0x6c252f30 start + 9086744
STDERR:     16  DumpRenderTree                      0x6c305532 start + 9817370
STDERR:     17  DumpRenderTree                      0x6c3056e3 start + 9817803
STDERR:     18  DumpRenderTree                      0x6c303806 start + 9809902
STDERR:     19  libSystem.B.dylib                   0x94e1a055 _pthread_start + 321
STDERR:     20  libSystem.B.dylib                   0x94e19f12 thread_start + 34
STDERR:

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