[Webkit-unassigned] [Bug 232497] New: [ BigSur Debug wk2 arm64 EWS-only ] media/media-source/media-source-istypesupported-case-sensitive.html is a flaky crash

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=232497

            Bug ID: 232497
           Summary: [ BigSur Debug wk2 arm64 EWS-only ]
                    media/media-source/media-source-istypesupported-case-s
                    ensitive.html is a flaky crash
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Media
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ehutchison at apple.com

Created attachment 442843

  --> https://bugs.webkit.org/attachment.cgi?id=442843&action=review

Crash Log

media/media-source/media-source-istypesupported-case-sensitive.html

is a flaky crash on EWS-only on BigSur wk2 Debug arm64. It is not seen failing on OpenSource.

History: https://results.webkit.org/?suite=layout-tests&test=media/media-source/media-source-istypesupported-case-sensitive.html

Build: https://ews-build.webkit.org/#/builders/60/builds/15664

Results: https://ews-build.s3-us-west-2.amazonaws.com/macOS-AppleSilicon-Big-Sur-Debug-WK2-Tests-EWS/r442804-15664-rerun/results.html

Crash Log (attached): https://ews-build.s3-us-west-2.amazonaws.com/macOS-AppleSilicon-Big-Sur-Debug-WK2-Tests-EWS/r442804-15664-rerun/com.apple.WebKit.GPU.Development-29124-crash-log.txt

STDERR: No crash log found for GPUProcess:29124.

stdout:

stderr:
LEAK: 1 WebPageProxy

Crash:
Thread 17 Crashed:: Dispatch queue: com.apple.coremedia.videoqueue.notification
0   com.apple.CoreMedia                 0x000000019a8cdda4 FigBaseObjectFinalize + 80
1   com.apple.CoreFoundation            0x0000000192d08e20 _CFRelease + 248
2   com.apple.CoreFoundation            0x0000000192d08e20 _CFRelease + 248
3   com.apple.MediaToolbox              0x000000019e550338 0x19dfb8000 + 5866296
4   libdispatch.dylib                   0x0000000192982128 _dispatch_call_block_and_release + 32
5   libdispatch.dylib                   0x0000000192983ec0 _dispatch_client_callout + 20
6   libdispatch.dylib                   0x000000019298b6a8 _dispatch_lane_serial_drain + 620
7   libdispatch.dylib                   0x000000019298c2a4 _dispatch_lane_invoke + 404
8   libdispatch.dylib                   0x0000000192996b74 _dispatch_workloop_worker_thread + 764
9   libsystem_pthread.dylib             0x0000000192b2f89c _pthread_wqthread + 276
10  libsystem_pthread.dylib             0x0000000192b2e5d4 start_wqthread + 8

This is not seen on OpenSource and I was not able to reproduce the crash locally.

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