Bug 232492

Summary: [ BigSur Debug wk2 arm64 EWS ] webrtc/video-receivers.html is a flaky crash
Product: WebKit Reporter: Eric Hutchison <ehutchison>
Component: WebRTCAssignee: Nobody <webkit-unassigned>
Status: NEW ---    
Severity: Normal CC: ehutchison, webkit-bot-watchers-bugzilla, webkit-bug-importer, youennf
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   
Attachments:
Description Flags
Crash Log none

Description Eric Hutchison 2021-10-29 10:13:05 PDT 
Created attachment 442831 [details]
Crash Log

webrtc/video-receivers.html

is a flaky crash on BigSur Debug wk2 arm64 EWS-only.

History: https://results.webkit.org/?suite=layout-tests&test=webrtc/video-receivers.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/results.html

Crash Log (attached): https://ews-build.s3-us-west-2.amazonaws.com/macOS-AppleSilicon-Big-Sur-Debug-WK2-Tests-EWS/r442268-15245/com.apple.WebKit.GPU.Development-32322-crash-log.txt

Thread 52 Crashed:: Dispatch queue: vtencoder-callback-queue-0x2e0124c40
0   libsystem_pthread.dylib       	0x00000001987e1d9c pthread_mutex_lock + 0
1   com.apple.VideoToolbox        	0x00000001a3830858 VTEncoderSessionEmitEncodedFrame + 404
2   com.apple.VideoToolbox        	0x00000001a38debb4 0x1a381d000 + 793524
3   libxpc.dylib                  	0x00000001985517d0 _xpc_connection_call_event_handler + 172
4   libxpc.dylib                  	0x000000019855032c _xpc_connection_mach_event + 968
5   libdispatch.dylib             	0x0000000198637f8c _dispatch_client_callout4 + 20
6   libdispatch.dylib             	0x0000000198653114 _dispatch_mach_msg_invoke + 476
7   libdispatch.dylib             	0x000000019863f570 _dispatch_lane_serial_drain + 308
8   libdispatch.dylib             	0x0000000198653e78 _dispatch_mach_invoke + 464
9   libdispatch.dylib             	0x000000019863f570 _dispatch_lane_serial_drain + 308
10  libdispatch.dylib             	0x00000001986402d8 _dispatch_lane_invoke + 456
11  libdispatch.dylib             	0x0000000198649684 _dispatch_root_queue_drain + 388
12  libdispatch.dylib             	0x000000019864941c _dispatch_worker_thread + 236
13  libsystem_pthread.dylib       	0x00000001987e7878 _pthread_start + 320
14  libsystem_pthread.dylib       	0x00000001987e25e0 thread_start + 8

As noted above, this test crash has not been seen on OpenSource.
Comment 1 Radar WebKit Bug Importer 2021-10-29 10:13:34 PDT 
<rdar://problem/84813043>
Comment 2 Eric Hutchison 2021-10-29 10:21:27 PDT 
Updated test expectations at https://trac.webkit.org/changeset/285037/webkit