Filed by: archaeopteryx [at] coole-files.de https://treeherder.mozilla.org/logviewer.html#?job_id=126410160&repo=autoland https://queue.taskcluster.net/v1/task/GwOM4D_oTMKQ56LVJrF9lQ/runs/0/artifacts/public/test_info//robocop_errorsummary.log [task 2017-08-28T12:08:49.045197Z] 12:08:49 INFO - TEST-START | testICODecoder [task 2017-08-28T12:08:49.047679Z] 12:08:49 INFO - TEST-OK | testICODecoder | took 11799ms [task 2017-08-28T12:08:49.049410Z] 12:08:49 INFO - TEST-START | Shutdown [task 2017-08-28T12:08:49.049449Z] 12:08:49 INFO - Passed: 31 [task 2017-08-28T12:08:49.049475Z] 12:08:49 INFO - Failed: 0 [task 2017-08-28T12:08:49.049494Z] 12:08:49 INFO - Todo: 0 [task 2017-08-28T12:08:49.049515Z] 12:08:49 INFO - SimpleTest FINISHED [task 2017-08-28T12:09:10.265576Z] 12:09:10 INFO - INFO | automation.py | Application ran for: 0:01:00.752406 [task 2017-08-28T12:09:10.265945Z] 12:09:10 INFO - INFO | zombiecheck | Reading PID log: /tmp/tmpFvmAIwpidlog [task 2017-08-28T12:09:10.857262Z] 12:09:10 INFO - /data/tombstones does not exist; tombstone check skipped [task 2017-08-28T12:09:11.766095Z] 12:09:11 INFO - mozcrash Downloading symbols from: https://queue.taskcluster.net/v1/task/IdjRrjZuTwuEnB8awqwdHg/artifacts/public/build/target.crashreporter-symbols.zip [task 2017-08-28T12:09:15.860819Z] 12:09:15 INFO - mozcrash Copy/paste: /home/worker/workspace/build/linux64-minidump_stackwalk /tmp/tmpRSFslh/73bc931c-1915-54b4-2f12-cd14f5408f07.dmp /tmp/tmpUuxl4U [task 2017-08-28T12:09:23.703876Z] 12:09:23 INFO - mozcrash Saved minidump as /home/worker/workspace/build/blobber_upload_dir/73bc931c-1915-54b4-2f12-cd14f5408f07.dmp [task 2017-08-28T12:09:23.704248Z] 12:09:23 INFO - mozcrash Saved app info as /home/worker/workspace/build/blobber_upload_dir/73bc931c-1915-54b4-2f12-cd14f5408f07.extra [task 2017-08-28T12:09:23.707242Z] 12:09:23 WARNING - PROCESS-CRASH | testICODecoder | application crashed [@ MessageLoop::PostTask_Helper] [task 2017-08-28T12:09:23.707796Z] 12:09:23 INFO - Crash dump filename: /tmp/tmpRSFslh/73bc931c-1915-54b4-2f12-cd14f5408f07.dmp [task 2017-08-28T12:09:23.708041Z] 12:09:23 INFO - Operating system: Android [task 2017-08-28T12:09:23.708400Z] 12:09:23 INFO - 0.0.0 Linux 2.6.29-gea477bb #1 Wed Sep 26 11:04:45 PDT 2012 armv7l [task 2017-08-28T12:09:23.708630Z] 12:09:23 INFO - CPU: arm [task 2017-08-28T12:09:23.711773Z] 12:09:23 INFO - ARMv7 ARM Cortex-A8 features: swp,half,thumb,fastmult,vfpv2,edsp,neon,vfpv3 [task 2017-08-28T12:09:23.711812Z] 12:09:23 INFO - 1 CPU [task 2017-08-28T12:09:23.711836Z] 12:09:23 INFO - GPU: UNKNOWN [task 2017-08-28T12:09:23.711892Z] 12:09:23 INFO - Crash reason: SIGSEGV [task 2017-08-28T12:09:23.711929Z] 12:09:23 INFO - Crash address: 0x5cf40e70 [task 2017-08-28T12:09:23.711959Z] 12:09:23 INFO - Process uptime: not available [task 2017-08-28T12:09:23.711979Z] 12:09:23 INFO - Thread 0 (crashed) [task 2017-08-28T12:09:23.712041Z] 12:09:23 INFO - 0 libxul.so!MessageLoop::PostTask_Helper [RefPtr.h:d5b6d113cf17 : 287 + 0x0] [task 2017-08-28T12:09:23.712101Z] 12:09:23 INFO - r0 = 0x5cf40e24 r1 = 0xbeee951c r2 = 0x00000000 r3 = 0x58b37490 [task 2017-08-28T12:09:23.712179Z] 12:09:23 INFO - r4 = 0x5b3e7dc8 r5 = 0x58b37490 r6 = 0x5cf40e24 r7 = 0x5d250a70 [task 2017-08-28T12:09:23.712244Z] 12:09:23 INFO - r8 = 0x536a9ad7 r9 = 0x4c466e0c r10 = 0x2a00d0a0 r12 = 0x00000001 [task 2017-08-28T12:09:23.712294Z] 12:09:23 INFO - fp = 0xbeee960c sp = 0xbeee9504 lr = 0x53695483 pc = 0x536953c8 [task 2017-08-28T12:09:23.712345Z] 12:09:23 INFO - Found by: given as instruction pointer in context [task 2017-08-28T12:09:23.712378Z] 12:09:23 INFO - 1 libxul.so!MessageLoop::PostTask [message_loop.cc:d5b6d113cf17 : 358 + 0x3] [task 2017-08-28T12:09:23.712425Z] 12:09:23 INFO - r4 = 0x5b3e7dc8 r5 = 0x58b37490 r6 = 0xbeee9534 r7 = 0x5d250a70 [task 2017-08-28T12:09:23.712672Z] 12:09:23 INFO - r8 = 0x536a9ad7 r9 = 0x4c466e0c r10 = 0x2a00d0a0 fp = 0xbeee960c [task 2017-08-28T12:09:23.713057Z] 12:09:23 INFO - sp = 0xbeee9518 pc = 0x53695483 [task 2017-08-28T12:09:23.713374Z] 12:09:23 INFO - Found by: call frame info [task 2017-08-28T12:09:23.713737Z] 12:09:23 INFO - 2 libxul.so!mozilla::ipc::MessageChannel::PostErrorNotifyTask [MessageChannel.cpp:d5b6d113cf17 : 2621 + 0x3] [task 2017-08-28T12:09:23.713997Z] 12:09:23 INFO - r4 = 0x5b3e7dc8 r5 = 0x58b37490 r6 = 0xbeee9534 r7 = 0x5d250a70 [task 2017-08-28T12:09:23.714350Z] 12:09:23 INFO - r8 = 0x536a9ad7 r9 = 0x4c466e0c r10 = 0x2a00d0a0 fp = 0xbeee960c [task 2017-08-28T12:09:23.714547Z] 12:09:23 INFO - sp = 0xbeee9528 pc = 0x536a9ea5 [task 2017-08-28T12:09:23.714843Z] 12:09:23 INFO - Found by: call frame info [task 2017-08-28T12:09:23.715247Z] 12:09:23 INFO - 3 libxul.so!mozilla::ipc::MessageChannel::SynchronouslyClose [MessageChannel.cpp:d5b6d113cf17 : 2645 + 0x7] [task 2017-08-28T12:09:23.715535Z] 12:09:23 INFO - r4 = 0x5bf67fa8 r5 = 0xbeee957c r6 = 0x530bc140 r7 = 0x5d250a70 [task 2017-08-28T12:09:23.715837Z] 12:09:23 INFO - r8 = 0x536a9ad7 r9 = 0x4c466e0c r10 = 0x2a00d0a0 fp = 0xbeee960c [task 2017-08-28T12:09:23.716187Z] 12:09:23 INFO - sp = 0xbeee9550 pc = 0x536a6723 [task 2017-08-28T12:09:23.716455Z] 12:09:23 INFO - Found by: call frame info [task 2017-08-28T12:09:23.716769Z] 12:09:23 INFO - 4 libxul.so!mozilla::ipc::MessageChannel::Close [MessageChannel.cpp:d5b6d113cf17 : 2719 + 0x5] [task 2017-08-28T12:09:23.717109Z] 12:09:23 INFO - r3 = 0x00000000 r4 = 0x5bf67fa8 r5 = 0xbeee957c r6 = 0x530bc140 [task 2017-08-28T12:09:23.717466Z] 12:09:23 INFO - r7 = 0x5d250a70 r8 = 0x536a9ad7 r9 = 0x4c466e0c r10 = 0x2a00d0a0 [task 2017-08-28T12:09:23.717670Z] 12:09:23 INFO - fp = 0xbeee960c sp = 0xbeee9560 pc = 0x536acaef [task 2017-08-28T12:09:23.717963Z] 12:09:23 INFO - Found by: call frame info [task 2017-08-28T12:09:23.718311Z] 12:09:23 INFO - 5 libxul.so!mozilla::layers::UiCompositorControllerChild::Destroy [UiCompositorControllerChild.cpp:d5b6d113cf17 : 207 + 0x5] [task 2017-08-28T12:09:23.718610Z] 12:09:23 INFO - r4 = 0x00000001 r5 = 0x5bf67f30 r6 = 0xbeee959c r7 = 0xbeee95d4 [task 2017-08-28T12:09:23.718901Z] 12:09:23 INFO - r8 = 0x53009558 r9 = 0x4c466e0c r10 = 0x2a00d0a0 fp = 0xbeee960c [task 2017-08-28T12:09:23.719266Z] 12:09:23 INFO - sp = 0xbeee9598 pc = 0x539efbc5 [task 2017-08-28T12:09:23.719433Z] 12:09:23 INFO - Found by: call frame info [task 2017-08-28T12:09:23.719873Z] 12:09:23 INFO - 6 libxul.so!mozilla::detail::RunnableMethodImpl<(anonymous namespace)::HangMonitorChild*, void ((anonymous namespace)::HangMonitorChild::*)(), false, (mozilla::RunnableKind)0u>::Run [nsThreadUtils.h:d5b6d113cf17 : 1142 + 0x1] [task 2017-08-28T12:09:23.720273Z] 12:09:23 INFO - r4 = 0x563ea838 r5 = 0x563ea84c r6 = 0x563ea844 r7 = 0xbeee95d4 [task 2017-08-28T12:09:23.720529Z] 12:09:23 INFO - r8 = 0x53009558 r9 = 0x4c466e0c r10 = 0x2a00d0a0 fp = 0xbeee960c [task 2017-08-28T12:09:23.720866Z] 12:09:23 INFO - sp = 0xbeee95c0 pc = 0x534783eb [task 2017-08-28T12:09:23.721104Z] 12:09:23 INFO - Found by: call frame info [task 2017-08-28T12:09:23.721476Z] 12:09:23 INFO - 7 libxul.so!mozilla::RunAndroidUiTasks [AndroidUiThread.cpp:d5b6d113cf17 : 360 + 0x3] [task 2017-08-28T12:09:23.721715Z] 12:09:23 INFO - r3 = 0x534783cd r4 = 0x563ea838 r5 = 0x563ea84c r6 = 0x563ea844 [task 2017-08-28T12:09:23.722250Z] 12:09:23 INFO - r7 = 0xbeee95d4 r8 = 0x53009558 r9 = 0x4c466e0c r10 = 0x2a00d0a0 [task 2017-08-28T12:09:23.722317Z] 12:09:23 INFO - fp = 0xbeee960c sp = 0xbeee95c8 pc = 0x541e86db [task 2017-08-28T12:09:23.722681Z] 12:09:23 INFO - Found by: call frame info [task 2017-08-28T12:09:23.722856Z] 12:09:23 INFO - 8 libdvm.so + 0x1dc4e [task 2017-08-28T12:09:23.723278Z] 12:09:23 INFO - r4 = 0x4c7912a8 r5 = 0x2a00d090 r6 = 0x00000003 r7 = 0x4c466e14 [task 2017-08-28T12:09:23.723506Z] 12:09:23 INFO - r8 = 0xbeee95f8 r9 = 0x4c466e0c r10 = 0x2a00d0a0 fp = 0xbeee960c [task 2017-08-28T12:09:23.723806Z] 12:09:23 INFO - sp = 0xbeee95f8 pc = 0x4085bc50 [task 2017-08-28T12:09:23.724078Z] 12:09:23 INFO - Found by: call frame info [task 2017-08-28T12:09:23.724355Z] 12:09:23 INFO - 9 dalvik-heap (deleted) + 0x2d8eee [task 2017-08-28T12:09:23.724633Z] 12:09:23 INFO - sp = 0xbeee9608 pc = 0x4178def0 [task 2017-08-28T12:09:23.724873Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.725233Z] 12:09:23 INFO - 10 dalvik-heap (deleted) + 0xdb556 [task 2017-08-28T12:09:23.725478Z] 12:09:23 INFO - sp = 0xbeee960c pc = 0x41590558 [task 2017-08-28T12:09:23.725727Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.725996Z] 12:09:23 INFO - 11 libdvm.so + 0x4dcad [task 2017-08-28T12:09:23.726282Z] 12:09:23 INFO - sp = 0xbeee9610 pc = 0x4088bcaf [task 2017-08-28T12:09:23.726543Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.726827Z] 12:09:23 INFO - 12 data@app@org.mozilla.fennec_aurora-1.apk@classes.dex + 0x510802 [task 2017-08-28T12:09:23.727070Z] 12:09:23 INFO - sp = 0xbeee9618 pc = 0x52536804 [task 2017-08-28T12:09:23.727378Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.727705Z] 12:09:23 INFO - 13 libxul.so!mozilla::RunAndroidUiTasks() + 0x15e [task 2017-08-28T12:09:23.727965Z] 12:09:23 INFO - sp = 0xbeee961c pc = 0x541e87c9 [task 2017-08-28T12:09:23.728267Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.728521Z] 12:09:23 INFO - 14 framework.odex + 0x5d722a [task 2017-08-28T12:09:23.728880Z] 12:09:23 INFO - sp = 0xbeee9628 pc = 0x4e0a922c [task 2017-08-28T12:09:23.729122Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.729465Z] 12:09:23 INFO - 15 libc.so!dlmalloc [malloc.c : 4695 + 0x7] [task 2017-08-28T12:09:23.729709Z] 12:09:23 INFO - sp = 0xbeee9650 pc = 0x400375f7 [task 2017-08-28T12:09:23.729958Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.730178Z] 12:09:23 INFO - 16 0xbeee96de [task 2017-08-28T12:09:23.730493Z] 12:09:23 INFO - r4 = 0x2a00d090 r5 = 0x2a00d0b8 r6 = 0xffffbfff r7 = 0x2a00d0b8 [task 2017-08-28T12:09:23.730843Z] 12:09:23 INFO - r8 = 0x408b08bd r9 = 0x2a00d090 r10 = 0x2a2ea7f0 fp = 0x523ad234 [task 2017-08-28T12:09:23.731134Z] 12:09:23 INFO - sp = 0xbeee9688 pc = 0xbeee96e0 [task 2017-08-28T12:09:23.731441Z] 12:09:23 INFO - Found by: call frame info [task 2017-08-28T12:09:23.731745Z] 12:09:23 INFO - 17 dalvik-LinearAlloc (deleted) + 0x32a2a6 [task 2017-08-28T12:09:23.731992Z] 12:09:23 INFO - sp = 0xbeee968c pc = 0x4c7912a8 [task 2017-08-28T12:09:23.732243Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.732524Z] 12:09:23 INFO - 18 data@app@org.mozilla.fennec_aurora-1.apk@classes.dex + 0x38722c [task 2017-08-28T12:09:23.732791Z] 12:09:23 INFO - sp = 0xbeee9694 pc = 0x523ad22e [task 2017-08-28T12:09:23.733072Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.733392Z] 12:09:23 INFO - 19 data@app@org.mozilla.fennec_aurora-1.apk@classes.dex + 0x387232 [task 2017-08-28T12:09:23.733637Z] 12:09:23 INFO - sp = 0xbeee9698 pc = 0x523ad234 [task 2017-08-28T12:09:23.733946Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.734208Z] 12:09:23 INFO - 20 libdvm.so + 0x782cd [task 2017-08-28T12:09:23.734498Z] 12:09:23 INFO - sp = 0xbeee96a0 pc = 0x408b62cf [task 2017-08-28T12:09:23.734765Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.735115Z] 12:09:23 INFO - 21 dalvik-LinearAlloc (deleted) + 0x32a2a6 [task 2017-08-28T12:09:23.735367Z] 12:09:23 INFO - sp = 0xbeee96b0 pc = 0x4c7912a8 [task 2017-08-28T12:09:23.735638Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.735892Z] 12:09:23 INFO - 22 dalvik-heap (deleted) + 0xb868e6 [task 2017-08-28T12:09:23.736141Z] 12:09:23 INFO - sp = 0xbeee96bc pc = 0x4203b8e8 [task 2017-08-28T12:09:23.736383Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.736592Z] 12:09:23 INFO - 23 dalvik-heap (deleted) + 0xb868e6 [task 2017-08-28T12:09:23.736888Z] 12:09:23 INFO - sp = 0xbeee96c4 pc = 0x4203b8e8 [task 2017-08-28T12:09:23.737272Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.737497Z] 12:09:23 INFO - 24 dalvik-heap (deleted) + 0x281006 [task 2017-08-28T12:09:23.737708Z] 12:09:23 INFO - sp = 0xbeee96c8 pc = 0x41736008 [task 2017-08-28T12:09:23.738005Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.738295Z] 12:09:23 INFO - 25 dalvik-heap (deleted) + 0x281006 [task 2017-08-28T12:09:23.738568Z] 12:09:23 INFO - sp = 0xbeee96e8 pc = 0x41736008 [task 2017-08-28T12:09:23.738830Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.739110Z] 12:09:23 INFO - 26 dalvik-heap (deleted) + 0xb89dbe [task 2017-08-28T12:09:23.739416Z] 12:09:23 INFO - sp = 0xbeee96ec pc = 0x4203edc0 [task 2017-08-28T12:09:23.739697Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.740019Z] 12:09:23 INFO - 27 dalvik-heap (deleted) + 0xb89dbe [task 2017-08-28T12:09:23.740309Z] 12:09:23 INFO - sp = 0xbeee96f4 pc = 0x4203edc0 [task 2017-08-28T12:09:23.740580Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.740869Z] 12:09:23 INFO - 28 dalvik-heap (deleted) + 0x281006 [task 2017-08-28T12:09:23.741193Z] 12:09:23 INFO - sp = 0xbeee96f8 pc = 0x41736008 [task 2017-08-28T12:09:23.741446Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.741747Z] 12:09:23 INFO - 29 dalvik-LinearAlloc (deleted) + 0x32a2a6 [task 2017-08-28T12:09:23.742045Z] 12:09:23 INFO - sp = 0xbeee9708 pc = 0x4c7912a8 [task 2017-08-28T12:09:23.742346Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.742604Z] 12:09:23 INFO - 30 dalvik-heap (deleted) + 0x2d8eee [task 2017-08-28T12:09:23.742864Z] 12:09:23 INFO - sp = 0xbeee9714 pc = 0x4178def0 [task 2017-08-28T12:09:23.743116Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.743361Z] 12:09:23 INFO - 31 libdvm.so + 0x22c7e [task 2017-08-28T12:09:23.743651Z] 12:09:23 INFO - sp = 0xbeee9718 pc = 0x40860c80 [task 2017-08-28T12:09:23.743895Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.744111Z] 12:09:23 INFO - 32 dalvik-heap (deleted) + 0xdb556 [task 2017-08-28T12:09:23.744410Z] 12:09:23 INFO - sp = 0xbeee9724 pc = 0x41590558 [task 2017-08-28T12:09:23.744664Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.744936Z] 12:09:23 INFO - 33 libdvm.so + 0x385e3 [task 2017-08-28T12:09:23.745192Z] 12:09:23 INFO - sp = 0xbeee9728 pc = 0x408765e5 [task 2017-08-28T12:09:23.745456Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.745697Z] 12:09:23 INFO - 34 dalvik-LinearAlloc (deleted) + 0x32a2a6 [task 2017-08-28T12:09:23.745946Z] 12:09:23 INFO - sp = 0xbeee9734 pc = 0x4c7912a8 [task 2017-08-28T12:09:23.746218Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.746502Z] 12:09:23 INFO - 35 data@app@org.mozilla.fennec_aurora-1.apk@classes.dex + 0x38722c [task 2017-08-28T12:09:23.746783Z] 12:09:23 INFO - sp = 0xbeee9738 pc = 0x523ad22e [task 2017-08-28T12:09:23.747034Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.747300Z] 12:09:23 INFO - 36 dalvik-heap (deleted) + 0x2d8eee [task 2017-08-28T12:09:23.747568Z] 12:09:23 INFO - sp = 0xbeee9744 pc = 0x4178def0 [task 2017-08-28T12:09:23.747836Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.748094Z] 12:09:23 INFO - 37 libdvm.so + 0x270a6 [task 2017-08-28T12:09:23.748336Z] 12:09:23 INFO - sp = 0xbeee9748 pc = 0x408650a8 [task 2017-08-28T12:09:23.748580Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.748824Z] 12:09:23 INFO - 38 dalvik-LinearAlloc (deleted) + 0x32a2a6 [task 2017-08-28T12:09:23.749058Z] 12:09:23 INFO - sp = 0xbeee9754 pc = 0x4c7912a8 [task 2017-08-28T12:09:23.749299Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.749527Z] 12:09:23 INFO - 39 libdvm.so + 0x2de9a [task 2017-08-28T12:09:23.749750Z] 12:09:23 INFO - sp = 0xbeee9764 pc = 0x4086be9c [task 2017-08-28T12:09:23.750019Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.750261Z] 12:09:23 INFO - 40 dalvik-LinearAlloc (deleted) + 0xa79b6 [task 2017-08-28T12:09:23.750513Z] 12:09:23 INFO - sp = 0xbeee9778 pc = 0x4c50e9b8 [task 2017-08-28T12:09:23.750745Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.750996Z] 12:09:23 INFO - 41 dalvik-heap (deleted) + 0x28d0da [task 2017-08-28T12:09:23.751236Z] 12:09:23 INFO - sp = 0xbeee977c pc = 0x417420dc [task 2017-08-28T12:09:23.751475Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.751713Z] 12:09:23 INFO - 42 libdvm.so + 0x2b582 [task 2017-08-28T12:09:23.751979Z] 12:09:23 INFO - sp = 0xbeee9780 pc = 0x40869584 [task 2017-08-28T12:09:23.752227Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.752454Z] 12:09:23 INFO - 43 dalvik-heap (deleted) + 0x18e066 [task 2017-08-28T12:09:23.752698Z] 12:09:23 INFO - sp = 0xbeee978c pc = 0x41643068 [task 2017-08-28T12:09:23.752946Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.753184Z] 12:09:23 INFO - 44 framework.odex + 0x50c326 [task 2017-08-28T12:09:23.753408Z] 12:09:23 INFO - sp = 0xbeee9790 pc = 0x4dfde328 [task 2017-08-28T12:09:23.753659Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.753887Z] 12:09:23 INFO - 45 dalvik-LinearAlloc (deleted) + 0xc2a6 [task 2017-08-28T12:09:23.754138Z] 12:09:23 INFO - sp = 0xbeee9798 pc = 0x4c4732a8 [task 2017-08-28T12:09:23.754379Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.754621Z] 12:09:23 INFO - 46 core.odex + 0x364ffe [task 2017-08-28T12:09:23.754873Z] 12:09:23 INFO - sp = 0xbeee979c pc = 0x4d7cd000 [task 2017-08-28T12:09:23.755104Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.755345Z] 12:09:23 INFO - 47 dalvik-heap (deleted) + 0x28d046 [task 2017-08-28T12:09:23.755576Z] 12:09:23 INFO - sp = 0xbeee97a0 pc = 0x41742048 [task 2017-08-28T12:09:23.755841Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.756068Z] 12:09:23 INFO - 48 dalvik-LinearAlloc (deleted) + 0xa79b6 [task 2017-08-28T12:09:23.756339Z] 12:09:23 INFO - sp = 0xbeee97f8 pc = 0x4c50e9b8 [task 2017-08-28T12:09:23.756582Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.756811Z] 12:09:23 INFO - 49 libdvm.so + 0xa9c86 [task 2017-08-28T12:09:23.757062Z] 12:09:23 INFO - sp = 0xbeee97fc pc = 0x408e7c88 [task 2017-08-28T12:09:23.757284Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.757543Z] 12:09:23 INFO - 50 dalvik-heap (deleted) + 0x2a6 [task 2017-08-28T12:09:23.757785Z] 12:09:23 INFO - sp = 0xbeee9804 pc = 0x414b52a8 [task 2017-08-28T12:09:23.758015Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.758251Z] 12:09:23 INFO - 51 dalvik-heap (deleted) + 0x28d002 [task 2017-08-28T12:09:23.758489Z] 12:09:23 INFO - sp = 0xbeee9808 pc = 0x41742004 [task 2017-08-28T12:09:23.758718Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.758948Z] 12:09:23 INFO - 52 libdvm.so + 0x5ff7d [task 2017-08-28T12:09:23.759190Z] 12:09:23 INFO - sp = 0xbeee9810 pc = 0x4089df7f [task 2017-08-28T12:09:23.759421Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.759658Z] 12:09:23 INFO - 53 dalvik-heap (deleted) + 0x281006 [task 2017-08-28T12:09:23.759957Z] 12:09:23 INFO - sp = 0xbeee9818 pc = 0x41736008 [task 2017-08-28T12:09:23.760277Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.760605Z] 12:09:23 INFO - 54 dalvik-heap (deleted) + 0x28d0c6 [task 2017-08-28T12:09:23.760877Z] 12:09:23 INFO - sp = 0xbeee9824 pc = 0x417420c8 [task 2017-08-28T12:09:23.761138Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.761399Z] 12:09:23 INFO - 55 dalvik-heap (deleted) + 0x281006 [task 2017-08-28T12:09:23.761719Z] 12:09:23 INFO - sp = 0xbeee9828 pc = 0x41736008 [task 2017-08-28T12:09:23.761999Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.762232Z] 12:09:23 INFO - 56 libdvm.so + 0xa9c86 [task 2017-08-28T12:09:23.762544Z] 12:09:23 INFO - sp = 0xbeee982c pc = 0x408e7c88 [task 2017-08-28T12:09:23.762839Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.763114Z] 12:09:23 INFO - 57 libdvm.so + 0x713a7 [task 2017-08-28T12:09:23.763385Z] 12:09:23 INFO - sp = 0xbeee9830 pc = 0x408af3a9 [task 2017-08-28T12:09:23.763647Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.764044Z] 12:09:23 INFO - 58 dalvik-heap (deleted) + 0x28d0c6 [task 2017-08-28T12:09:23.764246Z] 12:09:23 INFO - sp = 0xbeee983c pc = 0x417420c8 [task 2017-08-28T12:09:23.764571Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.764753Z] 12:09:23 INFO - 59 libdvm.so + 0x7227d [task 2017-08-28T12:09:23.765017Z] 12:09:23 INFO - sp = 0xbeee9840 pc = 0x408b027f [task 2017-08-28T12:09:23.765235Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.765492Z] 12:09:23 INFO - 60 libdvm.so + 0xa9c86 [task 2017-08-28T12:09:23.765748Z] 12:09:23 INFO - sp = 0xbeee9844 pc = 0x408e7c88 [task 2017-08-28T12:09:23.765985Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.766219Z] 12:09:23 INFO - 61 libdvm.so + 0xa9c86 [task 2017-08-28T12:09:23.766454Z] 12:09:23 INFO - sp = 0xbeee9848 pc = 0x408e7c88 [task 2017-08-28T12:09:23.766765Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.767136Z] 12:09:23 INFO - 62 dalvik-heap (deleted) + 0x28d0c6 [task 2017-08-28T12:09:23.767377Z] 12:09:23 INFO - sp = 0xbeee984c pc = 0x417420c8 [task 2017-08-28T12:09:23.767644Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.767892Z] 12:09:23 INFO - 63 libdvm.so + 0xae19e [task 2017-08-28T12:09:23.768196Z] 12:09:23 INFO - sp = 0xbeee9850 pc = 0x408ec1a0 [task 2017-08-28T12:09:23.768452Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.768706Z] 12:09:23 INFO - 64 libdvm.so + 0x29dee [task 2017-08-28T12:09:23.768957Z] 12:09:23 INFO - sp = 0xbeee9858 pc = 0x40867df0 [task 2017-08-28T12:09:23.769229Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.769491Z] 12:09:23 INFO - 65 dalvik-heap (deleted) + 0x5c626 [task 2017-08-28T12:09:23.769867Z] 12:09:23 INFO - sp = 0xbeee9868 pc = 0x41511628 [task 2017-08-28T12:09:23.770079Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.770368Z] 12:09:23 INFO - 66 dalvik-LinearAlloc (deleted) + 0xa79b6 [task 2017-08-28T12:09:23.770652Z] 12:09:23 INFO - sp = 0xbeee986c pc = 0x4c50e9b8 [task 2017-08-28T12:09:23.770945Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.771222Z] 12:09:23 INFO - 67 dalvik-heap (deleted) + 0x28d0c6 [task 2017-08-28T12:09:23.771519Z] 12:09:23 INFO - sp = 0xbeee9874 pc = 0x417420c8 [task 2017-08-28T12:09:23.771858Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.772267Z] 12:09:23 INFO - 68 dalvik-heap (deleted) + 0x28cfee [task 2017-08-28T12:09:23.772609Z] 12:09:23 INFO - sp = 0xbeee9878 pc = 0x41741ff0 [task 2017-08-28T12:09:23.772884Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.773162Z] 12:09:23 INFO - 69 dalvik-heap (deleted) + 0x2a6 [task 2017-08-28T12:09:23.773433Z] 12:09:23 INFO - sp = 0xbeee987c pc = 0x414b52a8 [task 2017-08-28T12:09:23.773769Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.774068Z] 12:09:23 INFO - 70 libdvm.so + 0x67aa1 [task 2017-08-28T12:09:23.774417Z] 12:09:23 INFO - sp = 0xbeee9888 pc = 0x408a5aa3 [task 2017-08-28T12:09:23.774706Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.775016Z] 12:09:23 INFO - 71 dalvik-heap (deleted) + 0x2a6 [task 2017-08-28T12:09:23.775235Z] 12:09:23 INFO - sp = 0xbeee988c pc = 0x414b52a8 [task 2017-08-28T12:09:23.775720Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.775783Z] 12:09:23 INFO - 72 dalvik-LinearAlloc (deleted) + 0xbe3e [task 2017-08-28T12:09:23.776323Z] 12:09:23 INFO - sp = 0xbeee9894 pc = 0x4c472e40 [task 2017-08-28T12:09:23.776511Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.776695Z] 12:09:23 INFO - 73 core.odex + 0xb3418 [task 2017-08-28T12:09:23.777002Z] 12:09:23 INFO - sp = 0xbeee9898 pc = 0x4d51b41a [task 2017-08-28T12:09:23.777327Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.777724Z] 12:09:23 INFO - 74 dalvik-heap (deleted) + 0x4306 [task 2017-08-28T12:09:23.777952Z] 12:09:23 INFO - sp = 0xbeee98a4 pc = 0x414b9308 [task 2017-08-28T12:09:23.778281Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.778509Z] 12:09:23 INFO - 75 libdvm.so + 0x1ddbe [task 2017-08-28T12:09:23.778747Z] 12:09:23 INFO - sp = 0xbeee98a8 pc = 0x4085bdc0 [task 2017-08-28T12:09:23.779143Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.779445Z] 12:09:23 INFO - 76 libdvm.so + 0x27062 [task 2017-08-28T12:09:23.779627Z] 12:09:23 INFO - sp = 0xbeee98b8 pc = 0x40865064 [task 2017-08-28T12:09:23.779955Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.780256Z] 12:09:23 INFO - 77 libdvm.so + 0x2de9a [task 2017-08-28T12:09:23.780518Z] 12:09:23 INFO - sp = 0xbeee98c4 pc = 0x4086be9c [task 2017-08-28T12:09:23.780821Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.781083Z] 12:09:23 INFO - 78 dalvik-LinearAlloc (deleted) + 0x9cc2e [task 2017-08-28T12:09:23.781392Z] 12:09:23 INFO - sp = 0xbeee98d8 pc = 0x4c503c30 [task 2017-08-28T12:09:23.781787Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.781946Z] 12:09:23 INFO - 79 libdvm.so + 0x2b582 [task 2017-08-28T12:09:23.782324Z] 12:09:23 INFO - sp = 0xbeee98e0 pc = 0x40869584 [task 2017-08-28T12:09:23.782509Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.782833Z] 12:09:23 INFO - 80 libdvm.so + 0x8e7f3 [task 2017-08-28T12:09:23.783079Z] 12:09:23 INFO - sp = 0xbeee98e4 pc = 0x408cc7f5 [task 2017-08-28T12:09:23.783432Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.783809Z] 12:09:23 INFO - 81 libdvm.so + 0x8e668 [task 2017-08-28T12:09:23.784098Z] 12:09:23 INFO - sp = 0xbeee98e8 pc = 0x408cc66a [task 2017-08-28T12:09:23.784524Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.784693Z] 12:09:23 INFO - 82 framework.odex + 0x66b635 [task 2017-08-28T12:09:23.784945Z] 12:09:23 INFO - sp = 0xbeee9958 pc = 0x4e13d637 [task 2017-08-28T12:09:23.785246Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.785578Z] 12:09:23 INFO - 83 dalvik-LinearAlloc (deleted) + 0x9cc2e [task 2017-08-28T12:09:23.785890Z] 12:09:23 INFO - sp = 0xbeee9964 pc = 0x4c503c30 [task 2017-08-28T12:09:23.786198Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.786495Z] 12:09:23 INFO - 84 libdvm.so + 0x5fcbf [task 2017-08-28T12:09:23.786756Z] 12:09:23 INFO - sp = 0xbeee9970 pc = 0x4089dcc1 [task 2017-08-28T12:09:23.787058Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.787316Z] 12:09:23 INFO - 85 dalvik-LinearAlloc (deleted) + 0x9cc2e [task 2017-08-28T12:09:23.787756Z] 12:09:23 INFO - sp = 0xbeee9978 pc = 0x4c503c30 [task 2017-08-28T12:09:23.787950Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.788198Z] 12:09:23 INFO - 86 dalvik-LinearAlloc (deleted) + 0x9cc2e [task 2017-08-28T12:09:23.788435Z] 12:09:23 INFO - sp = 0xbeee9980 pc = 0x4c503c30 [task 2017-08-28T12:09:23.788664Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.788891Z] 12:09:23 INFO - 87 libdvm.so + 0x8e6bb [task 2017-08-28T12:09:23.789129Z] 12:09:23 INFO - sp = 0xbeee9994 pc = 0x408cc6bd [task 2017-08-28T12:09:23.789356Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.789595Z] 12:09:23 INFO - 88 libdvm.so + 0x499ad [task 2017-08-28T12:09:23.789988Z] 12:09:23 INFO - sp = 0xbeee99a0 pc = 0x408879af [task 2017-08-28T12:09:23.790231Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.790544Z] 12:09:23 INFO - 89 libdvm.so + 0x8e6bb [task 2017-08-28T12:09:23.791010Z] 12:09:23 INFO - sp = 0xbeee99b4 pc = 0x408cc6bd [task 2017-08-28T12:09:23.791173Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.791524Z] 12:09:23 INFO - 90 dalvik-LinearAlloc (deleted) + 0x9cc2e [task 2017-08-28T12:09:23.791891Z] 12:09:23 INFO - sp = 0xbeee99b8 pc = 0x4c503c30 [task 2017-08-28T12:09:23.792044Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.792261Z] 12:09:23 INFO - 91 dalvik-LinearAlloc (deleted) + 0x9cc2e [task 2017-08-28T12:09:23.792550Z] 12:09:23 INFO - sp = 0xbeee99c0 pc = 0x4c503c30 [task 2017-08-28T12:09:23.792845Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.793104Z] 12:09:23 INFO - 92 libdvm.so + 0x3cb3d [task 2017-08-28T12:09:23.793520Z] 12:09:23 INFO - sp = 0xbeee99c8 pc = 0x4087ab3f [task 2017-08-28T12:09:23.793705Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.794236Z] 12:09:23 INFO - 93 dalvik-LinearAlloc (deleted) + 0x9cc2e [task 2017-08-28T12:09:23.794331Z] 12:09:23 INFO - sp = 0xbeee99d0 pc = 0x4c503c30 [task 2017-08-28T12:09:23.794681Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.794852Z] 12:09:23 INFO - 94 libdvm.so + 0x8e7f7 [task 2017-08-28T12:09:23.795175Z] 12:09:23 INFO - sp = 0xbeee99d4 pc = 0x408cc7f9 [task 2017-08-28T12:09:23.795495Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.795779Z] 12:09:23 INFO - 95 libdvm.so + 0xa43b7 [task 2017-08-28T12:09:23.796175Z] 12:09:23 INFO - sp = 0xbeee99dc pc = 0x408e23b9 [task 2017-08-28T12:09:23.796360Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.796612Z] 12:09:23 INFO - 96 libandroid_runtime.so + 0x8d6ff [task 2017-08-28T12:09:23.796947Z] 12:09:23 INFO - sp = 0xbeee99e4 pc = 0x40193701 [task 2017-08-28T12:09:23.797185Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.797435Z] 12:09:23 INFO - 97 app_process + 0x13a2 [task 2017-08-28T12:09:23.797727Z] 12:09:23 INFO - sp = 0xbeee99e8 pc = 0x2a0013a4 [task 2017-08-28T12:09:23.798009Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.798362Z] 12:09:23 INFO - 98 libdvm.so + 0x3cad3 [task 2017-08-28T12:09:23.798544Z] 12:09:23 INFO - sp = 0xbeee99ec pc = 0x4087aad5 [task 2017-08-28T12:09:23.798779Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.799027Z] 12:09:23 INFO - 99 libandroid_runtime.so + 0x8dcc5 [task 2017-08-28T12:09:23.799386Z] 12:09:23 INFO - sp = 0xbeee99fc pc = 0x40193cc7 [task 2017-08-28T12:09:23.799891Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.799948Z] 12:09:23 INFO - 100 libandroid_runtime.so + 0x4b68f [task 2017-08-28T12:09:23.800085Z] 12:09:23 INFO - sp = 0xbeee9a08 pc = 0x40151691 [task 2017-08-28T12:09:23.800399Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.800740Z] 12:09:23 INFO - 101 app_process + 0x13a2 [task 2017-08-28T12:09:23.800914Z] 12:09:23 INFO - sp = 0xbeee9a14 pc = 0x2a0013a4 [task 2017-08-28T12:09:23.801156Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.801500Z] 12:09:23 INFO - 102 libandroid_runtime.so + 0x4c311 [task 2017-08-28T12:09:23.801727Z] 12:09:23 INFO - sp = 0xbeee9a18 pc = 0x40152313 [task 2017-08-28T12:09:23.802122Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.802320Z] 12:09:23 INFO - 103 dalvik-LinearAlloc (deleted) + 0x9cc2e [task 2017-08-28T12:09:23.802622Z] 12:09:23 INFO - sp = 0xbeee9a1c pc = 0x4c503c30 [task 2017-08-28T12:09:23.802900Z] 12:09:23 INFO - Found by: stack scanning [task 2017-08-28T12:09:23.803221Z] 12:09:23 INFO - 104 libc.so!dlmalloc [malloc.c : 4695 + 0x7] [task 2017-08-28T12:09:23.803492Z] 12:09:23 INFO - sp = 0xbeee9a48 pc = 0x400375f7 [task 2017-08-28T12:09:23.803679Z] 12:09:23 INFO - Found by: stack scanning

As seen in related bugs, this is a frequent intermittent failure affecting a wide range of Android tests. AFAIK, all crashes happen during process shutdown. :billm -- It looks like you might be familiar with PostTask_Helper? This (approximate) crash signature has been seen infrequently in Android tests for some weeks, but seemed to become much more frequent around 2017-08-25, approximately suggesting a link to bug 1391848. Could you have a look?

I happened upon this unstarred crash on a Windows reftest...so maybe this is not only Android. https://treeherder.mozilla.org/logviewer.html#?repo=mozilla-inbound&job_id=126020650&lineNumber=23845

I think Randall would have a better idea what is going on here. We're trying to close the PUiCompositorController channel from the child side. It looks like this is a cross-thread (rather than cross-process) channel. We try to post an error runnable to the thread associated with the UiCompositorControllerParent, but it looks like that thread has already shut down.

It's a little hard to piece together with so many tests and bugs affected, but I think these crashes may have started on inbound, on August 17, around https://treeherder.mozilla.org/#/jobs?repo=mozilla-inbound&revision=b5a4f90196ef6212343c853c4446967697d7a511. I note 2 "compositor" bugs landing in that vicinity: bug 1389021 and bug 1390755. Trying to narrow it down with retries...

https://treeherder.mozilla.org/#/jobs?repo=mozilla-inbound&revision=b5d33e3a84200f0e5868e3429b5ad581a04441b6&filter-searchStr=robocop ...failures demonstrated before bug 1389021.

https://treeherder.mozilla.org/#/jobs?repo=mozilla-inbound&revision=4d2ae762f65a12dd2010e67314794fc195c29d12&filter-searchStr=robocop ...failures demonstrated before bug 1390755. ...so ignore comment 9. :(

Looking at, for instance, https://brasstacks.mozilla.com/orangefactor/?display=Bug&bugid=1359247&endday=2017-09-06&startday=2017-08-01&tree=trunk, it's apparent that this crash had been happening infrequently for many weeks, then became more frequent between Aug 22 and Aug 25; many more tests became affected and more bugs were then opened. I don't think I can find a specific changeset responsible for the change in frequency, nor the original regressing changeset. Hoping rbarker or snorp can sort this out soon, either here or in bug 1394788...

This may be fixed by my patch for Bug 1392705 where it makes sure to synchronously close the UiCompositorController on the UI thread before the remaining compositor IPC gets shutdown on the main thread. Specifically this part of the patch: https://reviewboard.mozilla.org/r/176970/diff/1#index_header