Filed by: btara [at] mozilla.com
Parsed log: https://treeherder.mozilla.org/logviewer.html#?job_id=311274277&repo=autoland
Full log: https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/deCFGKkXTh-BYTkSMzNZVg/runs/0/artifacts/public/logs/live_backing.log

...
[task 2020-07-28T14:40:52.444Z] 14:40:52     INFO - GECKO(3613) |     #36 PrepareAndDispatch /builds/worker/checkouts/gecko/xpcom/reflect/xptcall/md/unix/xptcstubs_x86_64_linux.cpp:125:37 (libxul.so+0xb47864)
[task 2020-07-28T14:40:52.445Z] 14:40:52     INFO - GECKO(3613) |     #37 SharedStub <null> (libxul.so+0xb46b12)
[task 2020-07-28T14:40:52.450Z] 14:40:52     INFO - GECKO(3613) |     #38 nsXREDirProvider::DoStartup() /builds/worker/checkouts/gecko/toolkit/xre/nsXREDirProvider.cpp:980:11 (libxul.so+0x656e5d8)
[task 2020-07-28T14:40:52.450Z] 14:40:52     INFO - GECKO(3613) |     #39 XREMain::XRE_mainRun() /builds/worker/checkouts/gecko/toolkit/xre/nsAppRunner.cpp:4558:16 (libxul.so+0x655ee42)
[task 2020-07-28T14:40:52.451Z] 14:40:52     INFO - GECKO(3613) |     #40 XREMain::XRE_main(int, char**, mozilla::BootstrapConfig const&) /builds/worker/checkouts/gecko/toolkit/xre/nsAppRunner.cpp:4968:8 (libxul.so+0x656007f)
[task 2020-07-28T14:40:52.452Z] 14:40:52     INFO - GECKO(3613) |     #41 XRE_main(int, char**, mozilla::BootstrapConfig const&) /builds/worker/checkouts/gecko/toolkit/xre/nsAppRunner.cpp:5022:21 (libxul.so+0x65603e4)
[task 2020-07-28T14:40:52.452Z] 14:40:52     INFO - GECKO(3613) |     #42 mozilla::BootstrapImpl::XRE_main(int, char**, mozilla::BootstrapConfig const&) /builds/worker/checkouts/gecko/toolkit/xre/Bootstrap.cpp:45:12 (libxul.so+0x656b022)
[task 2020-07-28T14:40:52.452Z] 14:40:52     INFO - GECKO(3613) |     #43 do_main /builds/worker/checkouts/gecko/browser/app/nsBrowserApp.cpp:217:22 (firefox+0xca443)
[task 2020-07-28T14:40:52.453Z] 14:40:52     INFO - GECKO(3613) |     #44 main /builds/worker/checkouts/gecko/browser/app/nsBrowserApp.cpp:331:16 (firefox+0xca443)
[task 2020-07-28T14:40:52.454Z] 14:40:52     INFO - GECKO(3613) | SUMMARY: ThreadSanitizer: data race /builds/worker/checkouts/gecko/gfx/layers/apz/src/AsyncPanZoomController.cpp:5142:12 in mozilla::layers::AsyncPanZoomController::SetState(mozilla::layers::AsyncPanZoomController::PanZoomState)
[task 2020-07-28T14:40:52.454Z] 14:40:52     INFO - GECKO(3613) | ==================
[task 2020-07-28T14:40:52.454Z] 14:40:52     INFO - GECKO(3613) | Exiting due to channel error.
[task 2020-07-28T14:40:52.456Z] 14:40:52     INFO - GECKO(3613) | Crash Annotation GraphicsCriticalError: |[C0][GFX1-]: Receive IPC close with reason=AbnormalShutdown (t=233.478) Exiting due to channel error.
[task 2020-07-28T14:40:52.456Z] 14:40:52     INFO - GECKO(3613) | Crash Annotation GraphicsCriticalError: |[C0][GFX1-]: Receive IPC close with reason=AbnormalShutdown (t=235.819) Exiting due to channel error.
[task 2020-07-28T14:40:52.456Z] 14:40:52     INFO - GECKO(3613) | Exiting due to channel error.
[task 2020-07-28T14:40:53.560Z] 14:40:53     INFO - GECKO(3613) | Crash Annotation GraphicsCriticalError: |[C0][GFX1-]: Receive IPC close with reason=AbnormalShutdown (t=246.141) Crash Annotation GraphicsCriticalError: |[C0][GFX1-]: Receive IPC close with reason=AbnormalShutdown (t=245.279)
[task 2020-07-28T14:40:53.561Z] 14:40:53     INFO - TEST-INFO | Main app process: killed by SIGIOT
[task 2020-07-28T14:40:53.562Z] 14:40:53     INFO - Buffered messages logged at 14:40:42
[task 2020-07-28T14:40:53.564Z] 14:40:53     INFO - TEST-PASS | gfx/layers/apz/test/mochitest/test_group_mouseevents.html | Starting subtest helper_click.html?dtc=false
...

[task 2020-07-28T14:40:52.392Z] 14:40:52     INFO - GECKO(3613) |   Previous read of size 4 at 0x7b74002f0ef0 by main thread:
[task 2020-07-28T14:40:52.393Z] 14:40:52     INFO - GECKO(3613) |     #0 mozilla::layers::AsyncPanZoomController::HandleDragEvent(mozilla::MouseInput const&, mozilla::layers::AsyncDragMetrics const&, mozilla::gfx::CoordTyped<mozilla::CSSPixel, float>) /builds/worker/checkouts/gecko/gfx/layers/apz/src/AsyncPanZoomController.cpp:1033:7 (libxul.so+0x201b03e)
[task 2020-07-28T14:40:52.393Z] 14:40:52     INFO - GECKO(3613) |     #1 mozilla::layers::DragBlockState::DispatchEvent(mozilla::InputData const&) const /builds/worker/checkouts/gecko/gfx/layers/apz/src/InputBlockState.cpp:282:20 (libxul.so+0x206746c)
[task 2020-07-28T14:40:52.393Z] 14:40:52     INFO - GECKO(3613) |     #2 mozilla::layers::InputQueue::ProcessQueue() /builds/worker/checkouts/gecko/gfx/layers/apz/src/InputQueue.cpp:833:19 (libxul.so+0x206dc88)
[task 2020-07-28T14:40:52.393Z] 14:40:52     INFO - GECKO(3613) |     #3 mozilla::layers::InputQueue::ReceiveMouseInput(RefPtr<mozilla::layers::AsyncPanZoomController> const&, mozilla::layers::TargetConfirmationFlags, mozilla::MouseInput const&, unsigned long*) /builds/worker/checkouts/gecko/gfx/layers/apz/src/InputQueue.cpp:239:3 (libxul.so+0x206d04b)

I think this read needs to hold the APZC recursive mutex.

https://hg.mozilla.org/mozilla-central/rev/00a02a686724

Set release status flags based on info from the regressing bug 1655237