[Webkit-unassigned] [Bug 230572] [ Mac ] TestWebKitAPI.Challenge.DeallocateDuringChallenge flakily crashes under DisplayLink::notifyObserversDisplayWasRefreshed

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=230572

Alexey Proskuryakov <ap at webkit.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |eric.carlson at apple.com,
                   |                            |jer.noble at apple.com
          Component|New Bugs                    |Media

--- Comment #3 from Alexey Proskuryakov <ap at webkit.org> ---
Divide by zero!

Crashed Thread:        14  CVDisplayLink

Exception Type:        EXC_ARITHMETIC (SIGFPE)
Exception Codes:       EXC_I386_DIV (divide by zero)
Exception Note:        EXC_CORPSE_NOTIFY

Termination Signal:    Floating point exception: 8
Termination Reason:    Namespace SIGNAL, Code 0x8
Terminating Process:   exc handler [81187]

...

Thread 14 Crashed:: CVDisplayLink
0   com.apple.WebKit                    0x000000010be4fab6 nextUpdate + 10 (DisplayUpdate.h:44) [inlined]
1   com.apple.WebKit                    0x000000010be4fab6 WebKit::DisplayLink::notifyObserversDisplayWasRefreshed() + 302 (DisplayLink.cpp:243)
2   com.apple.WebKit                    0x000000010be4f0f6 WebKit::DisplayLink::displayLinkCallback(__CVDisplayLink*, CVTimeStamp const*, CVTimeStamp const*, unsigned long long, unsigned long long*, void*) + 12 (DisplayLink.cpp:207)
3   com.apple.CoreVideo                 0x00007fff2729114a 0x7fff2728e000 + 12618
4   com.apple.CoreVideo                 0x00007fff27290579 0x7fff2728e000 + 9593
5   libsystem_pthread.dylib             0x00007fff2034b8fc 0x7fff20345000 + 26876
6   libsystem_pthread.dylib             0x00007fff20347443 0x7fff20345000 + 9283

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