229614 2021-08-27 09:50:57 -0700 [ BigSur EWS] webrtc/video-mediastreamtrack-stats.html is a flaky crash / failing 2021-08-27 15:46:43 -0700 1 1 1 Unclassified WebKit WebRTC WebKit Nightly Build Unspecified Unspecified NEW InRadar P2 Normal --- 1 ayumi_kojima webkit-unassigned eric.carlson webkit-bot-watchers-bugzilla webkit-bug-importer youennf oldest_to_newest 1788048 0 ayumi_kojima 2021-08-27 09:50:57 -0700 webrtc/video-mediastreamtrack-stats.html Is a flaky crash on macOS-AppleSilicon-Big-Sur-Debug-WK2-Tests-EWS. According to the history, the test has been flaky failing on Big Sur wk2 intel but I don't see any crash: https://results.webkit.org/?suite=layout-tests&test=webrtc%2Fvideo-mediastreamtrack-stats.html It looks like the flaky crash started on EWS at this build: https://ews-build.webkit.org/#/builders/60/builds/9803 Crash log: No crash log found for GPUProcess:95140. stdout: stderr: LEAK: 3 WebPageProxy Diff: --- /Volumes/Data/worker/bigsur-release-tests-wk2/build/layout-test-results/webrtc/video-mediastreamtrack-stats-expected.txt +++ /Volumes/Data/worker/bigsur-release-tests-wk2/build/layout-test-results/webrtc/video-mediastreamtrack-stats-actual.txt @@ -1,3 +1,3 @@ -PASS Basic video media stream track stats +FAIL Basic video media stream track stats assert_equals: expected (number) 480 but got (undefined) undefined 1788100 1 ayumi_kojima 2021-08-27 11:54:16 -0700 Marked expectation: https://trac.webkit.org/changeset/281710/webkit 1788102 2 webkit-bug-importer 2021-08-27 11:54:40 -0700 <rdar://problem/82448494> 1788103 3 ayumi_kojima 2021-08-27 11:55:48 -0700 I was able to reproduce the failure at TOT locally on my intel machine using: run-webkit-tests --iteration 50 webrtc/video-mediastreamtrack-stats.html 1788213 4 eric.carlson 2021-08-27 15:46:43 -0700 From https://ews-build.s3-us-west-2.amazonaws.com/macOS-AppleSilicon-Big-Sur-Debug-WK2-Tests-EWS/r435500-9803/com.apple.WebKit.GPU.Development-95140-crash-log.txt Crashed Thread: 18 Dispatch queue: vtencoder-callback-queue-0x14239fcf0 Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000000 Exception Note: EXC_CORPSE_NOTIFY Termination Signal: Segmentation fault: 11 Termination Reason: Namespace SIGNAL, Code 0xb Terminating Process: exc handler [95140] Thread 18 Crashed:: Dispatch queue: vtencoder-callback-queue-0x14239fcf0 0 libsystem_pthread.dylib 0x0000000180d85d9c pthread_mutex_lock + 0 1 com.apple.VideoToolbox 0x000000018bdd4858 VTEncoderSessionEmitEncodedFrame + 404 2 com.apple.VideoToolbox 0x000000018be82bb4 0x18bdc1000 + 793524 3 libxpc.dylib 0x0000000180af57d0 _xpc_connection_call_event_handler + 172 4 libxpc.dylib 0x0000000180af432c _xpc_connection_mach_event + 968 5 libdispatch.dylib 0x0000000180bdbf8c _dispatch_client_callout4 + 20 6 libdispatch.dylib 0x0000000180bf7114 _dispatch_mach_msg_invoke + 476 7 libdispatch.dylib 0x0000000180be3570 _dispatch_lane_serial_drain + 308 8 libdispatch.dylib 0x0000000180bf7e78 _dispatch_mach_invoke + 464 9 libdispatch.dylib 0x0000000180be3570 _dispatch_lane_serial_drain + 308 10 libdispatch.dylib 0x0000000180be42d8 _dispatch_lane_invoke + 456 11 libdispatch.dylib 0x0000000180bed684 _dispatch_root_queue_drain + 388 12 libdispatch.dylib 0x0000000180bed41c _dispatch_worker_thread + 236 13 libsystem_pthread.dylib 0x0000000180d8b878 _pthread_start + 320 14 libsystem_pthread.dylib 0x0000000180d865e0 thread_start + 8