Filed by: imoraru [at] mozilla.com
Parsed log: https://treeherder.mozilla.org/logviewer?job_id=346402938&repo=autoland
Full log: https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/Bc46AxUqSvOwfZxi5qjmbg/runs/0/artifacts/public/logs/live_backing.log

[task 2021-07-26T23:39:14.268Z] 23:39:14     INFO - TEST-START | /css/selectors/focus-visible-004.html
[task 2021-07-26T23:39:14.269Z] 23:39:14     INFO - Closing window c2893646-beb4-4376-9504-559317cf01ff
[task 2021-07-26T23:39:14.449Z] 23:39:14     INFO - PID 6903 | [Child 7288, Main Thread] WARNING: IPC message discarded: actor cannot send: file /builds/worker/checkouts/gecko/ipc/glue/ProtocolUtils.cpp:527
[task 2021-07-26T23:39:14.466Z] 23:39:14     INFO - PID 6903 | ###!!! [Parent][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2021-07-26T23:39:14.478Z] 23:39:14     INFO - PID 6903 | ###!!! [Parent][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2021-07-26T23:39:14.586Z] 23:39:14     INFO - PID 6903 | [Child 7400, Main Thread] WARNING: '!CanSend() || !mManager || !mManager->CanSend()', file /builds/worker/checkouts/gecko/dom/ipc/jsactor/JSWindowActorChild.cpp:40
[task 2021-07-26T23:39:14.705Z] 23:39:14     INFO - PID 6903 | [Child 7400, Main Thread] WARNING: NS_ENSURE_TRUE(info) failed: file /builds/worker/checkouts/gecko/extensions/permissions/PermissionDelegateHandler.cpp:348
[task 2021-07-26T23:39:14.941Z] 23:39:14     INFO - PID 6903 | [Child 7288, Main Thread] WARNING: Extra shutdown CC: 'i < NORMAL_SHUTDOWN_COLLECTIONS', file /builds/worker/checkouts/gecko/xpcom/base/nsCycleCollector.cpp:3357
[task 2021-07-26T23:39:14.943Z] 23:39:14     INFO - PID 6903 | WARNING: YOU ARE LEAKING THE WORLD (at least one JSRuntime and everything alive inside it, that is) AT JS_ShutDown TIME.  FIX THIS!
[task 2021-07-26T23:39:14.946Z] 23:39:14     INFO - PID 6903 | [Child 7288, Main Thread] ###!!! ASSERTION: 1 dynamic atom(s) with non-zero refcount: moz-nullprincipal:{5adf8898-f8e8-42f6-8bf0-b75073232fd0}?http://web-platform.test:8000: 'nonZeroRefcountAtomsCount == 0', file /builds/worker/checkouts/gecko/xpcom/ds/nsAtomTable.cpp:443
<...>
[task 2021-07-26T23:39:23.629Z] 23:39:23     INFO - PID 7482 | [7640, Main Thread] WARNING: XPCOM_MEM_BLOAT_LOG is set, disabling native allocations.: file /builds/worker/checkouts/gecko/tools/profiler/core/platform.cpp:250
[task 2021-07-26T23:39:23.660Z] 23:39:23     INFO - PID 7482 | [Child 7640, Main Thread] WARNING: could not set real-time limit in CubebUtils::InitLibrary: file /builds/worker/checkouts/gecko/dom/media/CubebUtils.cpp:619
[task 2021-07-26T23:39:24.631Z] 23:39:24     INFO - mozcrash Saved minidump as /builds/worker/workspace/build/blobber_upload_dir/711171e8-461a-7145-2cbb-0154b8abbc31.dmp
[task 2021-07-26T23:39:24.642Z] 23:39:24     INFO - PROCESS-CRASH | /css/selectors/focus-visible-004.html | application crashed [@ libc.so.6 + 0x430f1]
[task 2021-07-26T23:39:24.642Z] 23:39:24     INFO - Crash dump filename: /tmp/tmp17s3j36f/minidumps/711171e8-461a-7145-2cbb-0154b8abbc31.dmp
[task 2021-07-26T23:39:24.642Z] 23:39:24     INFO - Operating system: Linux
[task 2021-07-26T23:39:24.642Z] 23:39:24     INFO -                   0.0.0 Linux 4.4.0-1014-aws #14taskcluster1-Ubuntu SMP Tue Apr 3 10:27:00 UTC 2018 x86_64
[task 2021-07-26T23:39:24.642Z] 23:39:24     INFO - CPU: amd64
[task 2021-07-26T23:39:24.642Z] 23:39:24     INFO -      family 23 model 1 stepping 2
[task 2021-07-26T23:39:24.642Z] 23:39:24     INFO -      4 CPUs
[task 2021-07-26T23:39:24.642Z] 23:39:24     INFO - 
[task 2021-07-26T23:39:24.642Z] 23:39:24     INFO - GPU: UNKNOWN
[task 2021-07-26T23:39:24.642Z] 23:39:24     INFO - 
[task 2021-07-26T23:39:24.642Z] 23:39:24     INFO - Crash reason:  SIGSEGV /SEGV_MAPERR
[task 2021-07-26T23:39:24.642Z] 23:39:24     INFO - Crash address: 0x0
[task 2021-07-26T23:39:24.642Z] 23:39:24     INFO - Process uptime: not available
[task 2021-07-26T23:39:24.642Z] 23:39:24     INFO - 
[task 2021-07-26T23:39:24.642Z] 23:39:24     INFO - Thread 0 (crashed) - Web Content 0  libxul.so!mozilla::LinkedList<nsSHistory>::~LinkedList() [LinkedList.h:9caeb031968ec3a3ab5435e4889eb981e10deaab : 440 + 0x36]
[task 2021-07-26T23:39:24.642Z] 23:39:24     INFO -     rax = 0x000055969f178660   rdx = 0x0000000000000000
[task 2021-07-26T23:39:24.642Z] 23:39:24     INFO -     rcx = 0x0000000000000b40   rbx = 0x000055969f178670
[task 2021-07-26T23:39:24.642Z] 23:39:24     INFO -     rsi = 0x00007f2ea49eb8b0   rdi = 0x00007f2ea49ea680
[task 2021-07-26T23:39:24.642Z] 23:39:24     INFO -     rbp = 0x00007fff96a03820   rsp = 0x00007fff96a03810
[task 2021-07-26T23:39:24.642Z] 23:39:24     INFO -      r8 = 0x00007f2ea49eb8b0    r9 = 0x00007f2ea58e0780
[task 2021-07-26T23:39:24.642Z] 23:39:24     INFO -     r10 = 0x0000000000000000   r11 = 0x0000000000000000
[task 2021-07-26T23:39:24.642Z] 23:39:24     INFO -     r12 = 0x00007f2ea49e9718   r13 = 0x0000000000000165
[task 2021-07-26T23:39:24.642Z] 23:39:24     INFO -     r14 = 0x00007f2ea49ee628   r15 = 0x00007f2ea4174800
[task 2021-07-26T23:39:24.647Z] 23:39:24     INFO -     rip = 0x00007f2e9791d9c1
[task 2021-07-26T23:39:24.648Z] 23:39:24     INFO -     Found by: given as instruction pointer in context
[task 2021-07-26T23:39:24.648Z] 23:39:24     INFO -  1  libc.so.6 + 0x430f1
[task 2021-07-26T23:39:24.649Z] 23:39:24     INFO -     rbx = 0x0000000000000001   rbp = 0x0000000000000000
[task 2021-07-26T23:39:24.649Z] 23:39:24     INFO -     rsp = 0x00007fff96a03830   r12 = 0x00007f2ea49e9718
[task 2021-07-26T23:39:24.649Z] 23:39:24     INFO -     r13 = 0x0000000000000165   r14 = 0x00007f2ea49ee628
[task 2021-07-26T23:39:24.649Z] 23:39:24     INFO -     r15 = 0x00007f2ea4174800   rip = 0x00007f2ea46410f1
[task 2021-07-26T23:39:24.649Z] 23:39:24     INFO -     Found by: call frame info
[task 2021-07-26T23:39:24.649Z] 23:39:24     INFO -  2  firefox-bin + 0xe0500
[task 2021-07-26T23:39:24.649Z] 23:39:24     INFO -     rsp = 0x00007fff96a03858   rip = 0x000055969f172500
[task 2021-07-26T23:39:24.650Z] 23:39:24     INFO -     Found by: stack scanning
[task 2021-07-26T23:39:24.650Z] 23:39:24     INFO -  3  firefox-bin + 0x41390
[task 2021-07-26T23:39:24.650Z] 23:39:24     INFO -     rsp = 0x00007fff96a03860   rip = 0x000055969f0d3390
[task 2021-07-26T23:39:24.650Z] 23:39:24     INFO -     Found by: stack scanning
[task 2021-07-26T23:39:24.650Z] 23:39:24     INFO -  4  libc.so.6 + 0x431ea
[task 2021-07-26T23:39:24.650Z] 23:39:24     INFO -     rsp = 0x00007fff96a03880   rip = 0x00007f2ea46411ea
[task 2021-07-26T23:39:24.651Z] 23:39:24     INFO -     Found by: stack scanning
[task 2021-07-26T23:39:24.651Z] 23:39:24     INFO -  5  firefox-bin + 0xe0500
[task 2021-07-26T23:39:24.652Z] 23:39:24     INFO -     rsp = 0x00007fff96a03888   rip = 0x000055969f172500
[task 2021-07-26T23:39:24.652Z] 23:39:24     INFO -     Found by: stack scanning
[task 2021-07-26T23:39:24.652Z] 23:39:24     INFO -  6  libc.so.6 + 0x21b9e
[task 2021-07-26T23:39:24.652Z] 23:39:24     INFO -     rsp = 0x00007fff96a03890   rip = 0x00007f2ea461fb9e
[task 2021-07-26T23:39:24.653Z] 23:39:24     INFO -     Found by: stack scanning
[task 2021-07-26T23:39:24.653Z] 23:39:24     INFO -  7  firefox-bin!mozilla::UniquePtr<mozilla::Bootstrap, mozilla::Bootstrap::BootstrapDelete>::~UniquePtr() [UniquePtr.h:9caeb031968ec3a3ab5435e4889eb981e10deaab : 253 + 0x1f]
[task 2021-07-26T23:39:24.653Z] 23:39:24     INFO -     rsp = 0x00007fff96a038b0   rip = 0x000055969f0d3535
[task 2021-07-26T23:39:24.653Z] 23:39:24     INFO -     Found by: stack scanning
[task 2021-07-26T23:39:24.653Z] 23:39:24     INFO -