Filed by: nbeleuzu [at] mozilla.com
Parsed log: https://treeherder.mozilla.org/logviewer?job_id=327195487&repo=mozilla-central
Full log: https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/JBLVI3S0Q4--nyjh75ySRg/runs/0/artifacts/public/logs/live_backing.log

[task 2021-01-19T22:33:16.820Z] 22:33:16     INFO - GECKO(4124) | Hit MOZ_CRASH(nsWeakReference not thread-safe) at /builds/worker/checkouts/gecko/xpcom/base/nsISupportsImpl.cpp:43
[task 2021-01-19T22:33:16.842Z] 22:33:16     INFO -  Initializing stack-fixing for the first stack frame, this may take a while...
[task 2021-01-19T22:33:22.620Z] 22:33:22     INFO - GECKO(4124) | #01: nsSupportsWeakReference::ClearWeakReferences() [xpcom/base/nsWeakReference.cpp:157]
[task 2021-01-19T22:33:22.621Z] 22:33:22     INFO - GECKO(4124) | #02: mozilla::dom::WebSocketImpl::Release() [dom/websocket/WebSocket.cpp:244]
[task 2021-01-19T22:33:22.621Z] 22:33:22     INFO - GECKO(4124) | #03: mozilla::net::BaseWebSocketChannel::~BaseWebSocketChannel() [netwerk/protocol/websocket/BaseWebSocketChannel.h:24]
[task 2021-01-19T22:33:22.621Z] 22:33:22     INFO - GECKO(4124) | #04: mozilla::net::WebSocketChannel::~WebSocketChannel() [netwerk/protocol/websocket/WebSocketChannel.cpp:1185]
[task 2021-01-19T22:33:22.621Z] 22:33:22     INFO - GECKO(4124) | #05: mozilla::net::WebSocketChannel::~WebSocketChannel() [netwerk/protocol/websocket/WebSocketChannel.cpp:1156]
[task 2021-01-19T22:33:22.622Z] 22:33:22     INFO - GECKO(4124) | #06: mozilla::net::WebSocketChannel::Release() [netwerk/protocol/websocket/WebSocketChannel.cpp:78]
[task 2021-01-19T22:33:22.622Z] 22:33:22     INFO - GECKO(4124) | #07: nsTimerImpl::Fire(int) [xpcom/threads/nsTimerImpl.cpp:597]
[task 2021-01-19T22:33:22.622Z] 22:33:22     INFO - GECKO(4124) | #08: nsTimerEvent::Run() [xpcom/threads/TimerThread.cpp:251]
[task 2021-01-19T22:33:22.622Z] 22:33:22     INFO - GECKO(4124) | #09: nsThread::ProcessNextEvent(bool, bool*) [xpcom/threads/nsThread.cpp:1200]
[task 2021-01-19T22:33:22.622Z] 22:33:22     INFO - GECKO(4124) | #10: NS_ProcessNextEvent(nsIThread*, bool) [xpcom/threads/nsThreadUtils.cpp:548]
[task 2021-01-19T22:33:22.623Z] 22:33:22     INFO - GECKO(4124) | #11: mozilla::net::nsSocketTransportService::Run() [netwerk/base/nsSocketTransportService2.cpp:1197]
[task 2021-01-19T22:33:22.623Z] 22:33:22     INFO - GECKO(4124) | 1611095596820	RemoteAgent	TRACE	<-(connection {a400a784-40b5-492b-a10e-2397bfcbfd2a}) {"id":3,"result":{"result":{"type":"number","value":42,"description":"42"}}}
[task 2021-01-19T22:33:22.623Z] 22:33:22     INFO - GECKO(4124) | #12: {virtual override thunk({offset(-32)}, mozilla::net::nsSocketTransportService::Run())} [/builds/worker/workspace/build/application/firefox/libxul.so + 0x4449911]
[task 2021-01-19T22:33:22.623Z] 22:33:22     INFO - GECKO(4124) | #13: nsThread::ProcessNextEvent(bool, bool*) [xpcom/threads/nsThread.cpp:1200]
[task 2021-01-19T22:33:22.624Z] 22:33:22     INFO - GECKO(4124) | #14: NS_ProcessNextEvent(nsIThread*, bool) [xpcom/threads/nsThreadUtils.cpp:548]
[task 2021-01-19T22:33:22.625Z] 22:33:22     INFO - GECKO(4124) | #15: mozilla::ipc::MessagePumpForNonMainThreads::Run(base::MessagePump::Delegate*) [ipc/glue/MessagePump.cpp:303]
[task 2021-01-19T22:33:22.626Z] 22:33:22     INFO - GECKO(4124) | #16: MessageLoop::RunInternal() [ipc/chromium/src/base/message_loop.cc:334]
[task 2021-01-19T22:33:22.626Z] 22:33:22     INFO - GECKO(4124) | #17: MessageLoop::Run() [ipc/chromium/src/base/message_loop.cc:310]
[task 2021-01-19T22:33:22.626Z] 22:33:22     INFO - GECKO(4124) | #18: nsThread::ThreadFunc(void*) [xpcom/threads/nsThread.cpp:443]
[task 2021-01-19T22:33:22.643Z] 22:33:22     INFO -  fix-stacks: error: failed to read symbols file `/builds/worker/workspace/build/symbols/libpthread.so.0/10063CBC74776C265F7DB3F1F380A3DA0/libpthread.so.0.sym` for `/lib/x86_64-linux-gnu/libpthread.so.0`
[task 2021-01-19T22:33:22.643Z] 22:33:22     INFO -  fix-stacks: note: this is expected and harmless for system libraries on debug automation runs
[task 2021-01-19T22:33:22.643Z] 22:33:22     INFO -  fix-stacks: No such file or directory (os error 2)
[task 2021-01-19T22:33:22.644Z] 22:33:22     INFO - GECKO(4124) | #20: ??? [/lib/x86_64-linux-gnu/libpthread.so.0 + 0x76db]
[task 2021-01-19T22:33:22.644Z] 22:33:22     INFO -  fix-stacks: error: failed to read symbols file `/builds/worker/workspace/build/symbols/libc.so.6/4B76CFD3972F3EACFE366DDD07AD902F0/libc.so.6.sym` for `/lib/x86_64-linux-gnu/libc.so.6`
[task 2021-01-19T22:33:22.644Z] 22:33:22     INFO -  fix-stacks: note: this is expected and harmless for system libraries on debug automation runs
[task 2021-01-19T22:33:22.645Z] 22:33:22     INFO -  fix-stacks: No such file or directory (os error 2)
[task 2021-01-19T22:33:22.645Z] 22:33:22     INFO - GECKO(4124) | #21: clone [/lib/x86_64-linux-gnu/libc.so.6 + 0x121a3f]
[task 2021-01-19T22:33:22.646Z] 22:33:22     INFO - GECKO(4124) | #22: ??? (???:???)
[task 2021-01-19T22:33:22.646Z] 22:33:22     INFO - GECKO(4124) | ExceptionHandler::GenerateDump cloned child 4395
[task 2021-01-19T22:33:22.646Z] 22:33:22     INFO - GECKO(4124) | ExceptionHandler::SendContinueSignalToChild sent continue signal to child
[task 2021-01-19T22:33:22.646Z] 22:33:22     INFO - GECKO(4124) | ExceptionHandler::WaitForContinueSignal waiting for continue signal...
[task 2021-01-19T22:33:22.646Z] 22:33:22     INFO - GECKO(4124) | Exiting due to channel error.
[task 2021-01-19T22:33:22.646Z] 22:33:22     INFO - GECKO(4124) | Exiting due to channel error.
[task 2021-01-19T22:33:22.646Z] 22:33:22     INFO - GECKO(4124) | Exiting due to channel error.
[task 2021-01-19T22:33:22.647Z] 22:33:22     INFO - GECKO(4124) | Exiting due to channel error.
[task 2021-01-19T22:33:22.647Z] 22:33:22     INFO - GECKO(4124) | Exiting due to channel error.
[task 2021-01-19T22:33:22.647Z] 22:33:22     INFO - GECKO(4124) | Exiting due to channel error.
[task 2021-01-19T22:33:22.654Z] 22:33:22     INFO - TEST-INFO | Main app process: exit 11
[task 2021-01-19T22:33:22.655Z] 22:33:22    ERROR - TEST-UNEXPECTED-FAIL | ShutdownLeaks | process() called before end of test suite
[task 2021-01-19T22:33:22.655Z] 22:33:22     INFO - TEST-INFO | Confirming we saw 83 DOCSHELL created and 59 destroyed log strings.
[task 2021-01-19T22:33:22.656Z] 22:33:22     INFO - TEST-INFO | Confirming we saw 243 DOMWINDOW created and 176 destroyed log strings.```