Bug 187529 – REGRESSION: Layout Test webrtc/video-with-receiver.html is a flaky crash

• Component: Tools / Tests
• Status: NEW

[Dawei Fenton (:realdawei)]

The following layout test is failing on High Sierra Release WK2

webrtc/video-with-receiver.html

Probable cause:

Unknown, investigating.

Flakiness Dashboard:

https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=webrtc%2Fvideo-with-receiver.html

[Ryan Haddad]

Application Specific Information:
CRASHING TEST: webrtc/video-with-data-channel.html

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   com.apple.WebCore             	0x00000001066744b4 WebCore::TrackPrivateBase::~TrackPrivateBase() + 4 (TrackPrivateBase.h:57)
1   com.apple.JavaScriptCore      	0x000000010a499e2e WTF::dispatchFunctionsFromMainThread() + 318 (MainThread.cpp:132)
2   com.apple.Foundation          	0x00007fff5408c2b5 __NSThreadPerformPerform + 334
3   com.apple.CoreFoundation      	0x00007fff51f58d81 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
4   com.apple.CoreFoundation      	0x00007fff5201065c __CFRunLoopDoSource0 + 108
5   com.apple.CoreFoundation      	0x00007fff51f3bd30 __CFRunLoopDoSources0 + 208
6   com.apple.CoreFoundation      	0x00007fff51f3b1ad __CFRunLoopRun + 1293
7   com.apple.CoreFoundation      	0x00007fff51f3aa07 CFRunLoopRunSpecific + 487
8   com.apple.HIToolbox           	0x00007fff51218d96 RunCurrentEventLoopInMode + 286
9   com.apple.HIToolbox           	0x00007fff51218b06 ReceiveNextEventCommon + 613
10  com.apple.HIToolbox           	0x00007fff51218884 _BlockUntilNextEventMatchingListInModeWithFilter + 64
11  com.apple.AppKit              	0x00007fff4f4cba73 _DPSNextEvent + 2085
12  com.apple.AppKit              	0x00007fff4fc61e34 -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 3044
13  com.apple.AppKit              	0x00007fff4f4c0885 -[NSApplication run] + 764
14  com.apple.AppKit              	0x00007fff4f48fa72 NSApplicationMain + 804
15  libxpc.dylib                  	0x00007fff7a639f57 _xpc_objc_main + 580
16  libxpc.dylib                  	0x00007fff7a638baa xpc_main + 417
17  com.apple.WebKit.WebContent   	0x00000001051516b5 main + 485
18  libdyld.dylib                 	0x00007fff7a2df015 start + 1

[Truitt Savell]

Test began crashing around on July 4th, closest revision that edited a webrtc file was r233506 <https://trac.webkit.org/changeset/233506/webkit>. I have been unable to reproduce the crash locally though.

[Dawei Fenton (:realdawei)]

Created attachment 344767 [details]
Crash Log

[Radar WebKit Bug Importer]

<rdar://problem/42171015>