1427811 - [triggered by accessibility] Assertion failure: mRawPtr != nullptr (You can't dereference a NULL nsCOMPtr with operator->().), at /builds/worker/workspace/build/src/obj-firefox/dist/include/nsCOMPtr.h:801

Status: REOPENED

(Core :: Disability Access APIs, defect, P3)

Description

[Jason Kratzer [:jkratzer]]

Testcase found while fuzzing mozilla-central rev ac93fdadf102.  On Linux, the testcase requires the GNOME_ACCESSIBILITY=1 env variable in order to reproduce the issue.  Further, the fuzzPriv extension is also required in order to reproduce the issue.

The fuzzPriv extension can be found at the following URL:
https://github.com/MozillaSecurity/fuzzpriv

rax = 0x0000000000000000   rdx = 0x0000000000000000
rcx = 0x00007f68a217b2ad   rbx = 0x0000000000000001
rsi = 0x00007f68a244a770   rdi = 0x00007f68a2449540
rbp = 0x00007fff0af9c690   rsp = 0x00007fff0af9c690
r8 = 0x00007f68a244a770    r9 = 0x00007f68a3730740
r10 = 0x0000000000000039   r11 = 0x0000000000000000
r12 = 0x00007fff0af9c6e0   r13 = 0x00007f68763610c0
r14 = 0x00007f687ea0fa10   r15 = 0x00007f687fefb160
rip = 0x00007f68915bcae6
OS|Linux|0.0.0 Linux 4.4.0-104-generic #127-Ubuntu SMP Mon Dec 11 12:16:42 UTC 2017 x86_64
CPU|amd64|family 6 model 78 stepping 3|1
GPU|||
Crash|SIGSEGV|0x0|0
0|0|libxul.so|nsCOMPtr<nsINode>::operator->|hg:hg.mozilla.org/mozilla-central:xpcom/base/nsCOMPtr.h:ac93fdadf102|800|0x5
0|1|libxul.so|mozilla::a11y::RootAccessible::ProcessDOMEvent|hg:hg.mozilla.org/mozilla-central:accessible/generic/RootAccessible.cpp:ac93fdadf102|285|0xc
0|2|libxul.so|mozilla::a11y::NotificationController::WillRefresh|hg:hg.mozilla.org/mozilla-central:accessible/base/NotificationController.cpp:ac93fdadf102|838|0x5
0|3|libxul.so|nsRefreshDriver::Tick|hg:hg.mozilla.org/mozilla-central:layout/base/nsRefreshDriver.cpp:ac93fdadf102|1862|0xd
0|4|libxul.so|mozilla::RefreshDriverTimer::TickRefreshDrivers|hg:hg.mozilla.org/mozilla-central:layout/base/nsRefreshDriver.cpp:ac93fdadf102|306|0xf
0|5|libxul.so|mozilla::RefreshDriverTimer::Tick|hg:hg.mozilla.org/mozilla-central:layout/base/nsRefreshDriver.cpp:ac93fdadf102|328|0x12
0|6|libxul.so|mozilla::VsyncRefreshDriverTimer::RefreshDriverVsyncObserver::TickRefreshDriver|hg:hg.mozilla.org/mozilla-central:layout/base/nsRefreshDriver.cpp:ac93fdadf102|769|0x5
0|7|libxul.so|mozilla::VsyncRefreshDriverTimer::RefreshDriverVsyncObserver::NotifyVsync|hg:hg.mozilla.org/mozilla-central:layout/base/nsRefreshDriver.cpp:ac93fdadf102|583|0xc
0|8|libxul.so|mozilla::layout::VsyncChild::RecvNotify|hg:hg.mozilla.org/mozilla-central:layout/ipc/VsyncChild.cpp:ac93fdadf102|68|0x9
0|9|libxul.so|mozilla::layout::PVsyncChild::OnMessageReceived|s3:gecko-generated-sources:06086093ccb59dd5a99cf8c9f9fb7f4860fd8ddbfd516af5e5b3508be62029679421dcf2abdf6b1c945b6a054050bd403c9574aad49f857cb4a31d3f4cf56b9a/ipc/ipdl/PVsyncChild.cpp:|155|0xf
0|10|libxul.so|mozilla::ipc::MessageChannel::DispatchAsyncMessage|hg:hg.mozilla.org/mozilla-central:ipc/glue/MessageChannel.cpp:ac93fdadf102|2110|0x6
0|11|libxul.so|mozilla::ipc::MessageChannel::DispatchMessage|hg:hg.mozilla.org/mozilla-central:ipc/glue/MessageChannel.cpp:ac93fdadf102|2040|0xb
0|12|libxul.so|mozilla::ipc::MessageChannel::RunMessage|hg:hg.mozilla.org/mozilla-central:ipc/glue/MessageChannel.cpp:ac93fdadf102|1886|0xb
0|13|libxul.so|mozilla::ipc::MessageChannel::MessageTask::Run|hg:hg.mozilla.org/mozilla-central:ipc/glue/MessageChannel.cpp:ac93fdadf102|1919|0xc
0|14|libxul.so|nsThread::ProcessNextEvent|hg:hg.mozilla.org/mozilla-central:xpcom/threads/nsThread.cpp:ac93fdadf102|1039|0x15
0|15|libxul.so|NS_ProcessNextEvent|hg:hg.mozilla.org/mozilla-central:xpcom/threads/nsThreadUtils.cpp:ac93fdadf102|510|0x11
0|16|libxul.so|mozilla::ipc::MessagePump::Run|hg:hg.mozilla.org/mozilla-central:ipc/glue/MessagePump.cpp:ac93fdadf102|97|0xa
0|17|libxul.so|MessageLoop::RunInternal|hg:hg.mozilla.org/mozilla-central:ipc/chromium/src/base/message_loop.cc:ac93fdadf102|326|0x17
0|18|libxul.so|MessageLoop::Run|hg:hg.mozilla.org/mozilla-central:ipc/chromium/src/base/message_loop.cc:ac93fdadf102|319|0x8
0|19|libxul.so|nsBaseAppShell::Run|hg:hg.mozilla.org/mozilla-central:widget/nsBaseAppShell.cpp:ac93fdadf102|157|0xd
0|20|libxul.so|XRE_RunAppShell|hg:hg.mozilla.org/mozilla-central:toolkit/xre/nsEmbedFunctions.cpp:ac93fdadf102|875|0x11
0|21|libxul.so|mozilla::ipc::MessagePumpForChildProcess::Run|hg:hg.mozilla.org/mozilla-central:ipc/glue/MessagePump.cpp:ac93fdadf102|269|0x5
0|22|libxul.so|MessageLoop::RunInternal|hg:hg.mozilla.org/mozilla-central:ipc/chromium/src/base/message_loop.cc:ac93fdadf102|326|0x17
0|23|libxul.so|MessageLoop::Run|hg:hg.mozilla.org/mozilla-central:ipc/chromium/src/base/message_loop.cc:ac93fdadf102|319|0x8
0|24|libxul.so|XRE_InitChildProcess|hg:hg.mozilla.org/mozilla-central:toolkit/xre/nsEmbedFunctions.cpp:ac93fdadf102|701|0x8
0|25|firefox|content_process_main|hg:hg.mozilla.org/mozilla-central:ipc/contentproc/plugin-container.cpp:ac93fdadf102|63|0x14
0|26|firefox|main|hg:hg.mozilla.org/mozilla-central:browser/app/nsBrowserApp.cpp:ac93fdadf102|280|0x11
0|27|libc-2.23.so||||0x20830
0|28|firefox|MOZ_ReportAssertionFailure|hg:hg.mozilla.org/mozilla-central:mfbt/Assertions.h:ac93fdadf102|165|0x5

Comment 1

[alexander :surkov (:asurkov)]

Jason, you forgot to attach a test case eventually?

Comment 2

[Jason Kratzer [:jkratzer]]

Attachment: trigger.html

Apologies for the delay.  Testcase attached.

Comment 3

[Intermittent Failures Robot]

1 failures in 5015 pushes (0.0 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 1

Platform breakdown:

• windows10-64: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1427811&startday=2020-03-30&endday=2020-04-05&tree=all

Comment 4

[Intermittent Failures Robot]

2 failures in 5423 pushes (0.0 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 2

Platform breakdown:

• linux1804-64-asan: 1
• linux1804-64: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1427811&startday=2020-04-27&endday=2020-05-03&tree=all

Comment 6

[Andreea Pavel [:apavel]]

Recent failure log: https://treeherder.mozilla.org/logviewer.html#/jobs?job_id=310121668&repo=mozilla-central&lineNumber=2461

[task 2020-07-17T04:03:52.111Z] 04:03:52 INFO - TEST-START | docshell/test/navigation/test_load_history_entry.html
[task 2020-07-17T04:03:52.208Z] 04:03:52 INFO - GECKO(1707) | Assertion failure: mRawPtr != nullptr (You can't dereference a NULL nsCOMPtr with operator->().), at /builds/worker/workspace/obj-build/dist/include/nsCOMPtr.h:859
[task 2020-07-17T04:03:52.245Z] 04:03:52 INFO - Initializing stack-fixing for the first stack frame, this may take a while...
[task 2020-07-17T04:04:07.925Z] 04:04:07 INFO - GECKO(1707) | #01: nsFocusManager::WindowHidden(mozIDOMWindowProxy*) [dom/base/nsFocusManager.cpp:1034]
[task 2020-07-17T04:04:07.926Z] 04:04:07 INFO - GECKO(1707) | #02: <name omitted> [dom/base/nsGlobalWindowInner.cpp:4196]
[task 2020-07-17T04:04:07.926Z] 04:04:07 INFO - GECKO(1707) | #03: nsDocumentViewer::PageHide(bool) [layout/base/nsDocumentViewer.cpp:1380]
[task 2020-07-17T04:04:07.927Z] 04:04:07 INFO - GECKO(1707) | #04: nsDocShell::FirePageHideNotificationInternal(bool, bool) [docshell/base/nsDocShell.cpp:1006]
[task 2020-07-17T04:04:07.927Z] 04:04:07 INFO - GECKO(1707) | #05: nsDocShell::Destroy() [docshell/base/nsDocShell.cpp:4151]
[task 2020-07-17T04:04:07.927Z] 04:04:07 INFO - GECKO(1707) | #06: nsWebBrowser::SetDocShell(nsDocShell*) [toolkit/components/browser/nsWebBrowser.cpp:1133]
[task 2020-07-17T04:04:07.928Z] 04:04:07 INFO - GECKO(1707) | #07: nsWebBrowser::InternalDestroy() [toolkit/components/browser/nsWebBrowser.cpp:176]
[task 2020-07-17T04:04:07.928Z] 04:04:07 INFO - GECKO(1707) | #08: non-virtual thunk to nsWebBrowser::Destroy() [toolkit/components/browser/nsWebBrowser.cpp:0]
[task 2020-07-17T04:04:07.928Z] 04:04:07 INFO - GECKO(1707) | #09: mozilla::dom::BrowserChild::DestroyWindow() [dom/ipc/BrowserChild.cpp:896]
[task 2020-07-17T04:04:07.929Z] 04:04:07 INFO - GECKO(1707) | #10: mozilla::dom::BrowserChild::RecvDestroy() [dom/ipc/BrowserChild.cpp:2346]
[task 2020-07-17T04:04:07.929Z] 04:04:07 INFO - GECKO(1707) | #11: mozilla::dom::PBrowserChild::OnMessageReceived(IPC::Message const&) [s3:gecko-generated-sources:0737fcecc4282a40df0487e3cfc7ca0eccaaff3e238412e1f2c776bbb3d298d4a3755eac0386df40d4ccae91eb3b483577226feb38e095ceb3965ea5db46ed38/ipc/ipdl/PBrowserChild.cpp::0]
[task 2020-07-17T04:04:07.929Z] 04:04:07 INFO - GECKO(1707) | #12: mozilla::dom::PContentChild::OnMessageReceived(IPC::Message const&) [s3:gecko-generated-sources:bbc325dab19b6b2653ee83a8c5783aff36c158d7a8e40888719e8eb3a8941e4793999a3f6e3cb9ca42af455cbb375f753c229a5c76ab4f4f404654cb7ac501c3/ipc/ipdl/PContentChild.cpp::8383]
[task 2020-07-17T04:04:07.930Z] 04:04:07 INFO - GECKO(1707) | #13: mozilla::ipc::MessageChannel::DispatchAsyncMessage(mozilla::ipc::ActorLifecycleProxy*, IPC::Message const&) [ipc/glue/MessageChannel.cpp:2151]
[task 2020-07-17T04:04:07.931Z] 04:04:07 INFO - GECKO(1707) | #14: mozilla::ipc::MessageChannel::DispatchMessage(IPC::Message&&) [ipc/glue/MessageChannel.cpp:2077]
[task 2020-07-17T04:04:07.931Z] 04:04:07 INFO - GECKO(1707) | #15: mozilla::ipc::MessageChannel::RunMessage(mozilla::ipc::MessageChannel::MessageTask&) [ipc/glue/MessageChannel.cpp:0]
[task 2020-07-17T04:04:07.932Z] 04:04:07 INFO - GECKO(1707) | #16: mozilla::ipc::MessageChannel::MessageTask::Run() [ipc/glue/MessageChannel.cpp:1955]
[task 2020-07-17T04:04:07.932Z] 04:04:07 INFO - GECKO(1707) | #17: mozilla::RunnableTask::Run() [xpcom/threads/TaskController.cpp:245]
[task 2020-07-17T04:04:07.933Z] 04:04:07 INFO - GECKO(1707) | #18: mozilla::TaskController::DoExecuteNextTaskOnlyMainThreadInternal(mozilla::detail::BaseAutoLock<mozilla::Mutex&> const&) [xpcom/threads/TaskController.cpp:499]
[task 2020-07-17T04:04:07.934Z] 04:04:07 INFO - GECKO(1707) | #19: mozilla::TaskController::ExecuteNextTaskOnlyMainThreadInternal(mozilla::detail::BaseAutoLock<mozilla::Mutex&> const&) [xpcom/threads/TaskController.cpp:0]
[task 2020-07-17T04:04:07.934Z] 04:04:07 INFO - GECKO(1707) | #20: mozilla::TaskController::ProcessPendingMTTask(bool) [xpcom/threads/TaskController.cpp:164]
[task 2020-07-17T04:04:07.935Z] 04:04:07 INFO - GECKO(1707) | #21: mozilla::detail::RunnableFunction<mozilla::TaskController::InitializeInternal()::$_5>::Run() [xpcom/threads/nsThreadUtils.h:578]
[task 2020-07-17T04:04:07.935Z] 04:04:07 INFO - GECKO(1707) | #22: nsThread::ProcessNextEvent(bool, bool*) [xpcom/threads/nsThread.cpp:1236]
[task 2020-07-17T04:04:07.936Z] 04:04:07 INFO - GECKO(1707) | #23: NS_ProcessNextEvent(nsIThread*, bool) [xpcom/threads/nsThreadUtils.cpp:513]
[task 2020-07-17T04:04:07.937Z] 04:04:07 INFO - GECKO(1707) | #24: mozilla::ipc::MessagePump::Run(base::MessagePump::Delegate*) [ipc/glue/MessagePump.cpp:0]
[task 2020-07-17T04:04:07.941Z] 04:04:07 INFO - GECKO(1707) | #25: MessageLoop::RunInternal() [ipc/chromium/src/base/message_loop.cc:334]
[task 2020-07-17T04:04:07.945Z] 04:04:07 INFO - GECKO(1707) | #26: MessageLoop::Run() [ipc/chromium/src/base/message_loop.cc:310]
[task 2020-07-17T04:04:07.949Z] 04:04:07 INFO - GECKO(1707) | #27: nsBaseAppShell::Run() [widget/nsBaseAppShell.cpp:139]
[task 2020-07-17T04:04:07.952Z] 04:04:07 INFO - GECKO(1707) | #28: XRE_RunAppShell() [toolkit/xre/nsEmbedFunctions.cpp:913]
[task 2020-07-17T04:04:07.955Z] 04:04:07 INFO - GECKO(1707) | #29: mozilla::ipc::MessagePumpForChildProcess::Run(base::MessagePump::Delegate*) [ipc/glue/MessagePump.cpp:237]
[task 2020-07-17T04:04:07.958Z] 04:04:07 INFO - GECKO(1707) | #30: MessageLoop::RunInternal() [ipc/chromium/src/base/message_loop.cc:334]
[task 2020-07-17T04:04:07.961Z] 04:04:07 INFO - GECKO(1707) | #31: MessageLoop::Run() [ipc/chromium/src/base/message_loop.cc:310]
[task 2020-07-17T04:04:07.963Z] 04:04:07 INFO - GECKO(1707) | #32: XRE_InitChildProcess(int, char**, XREChildData const*) [toolkit/xre/nsEmbedFunctions.cpp:744]
[task 2020-07-17T04:04:08.021Z] 04:04:08 INFO - GECKO(1707) | #33: content_process_main(mozilla::Bootstrap*, int, char**) [ipc/contentproc/plugin-container.cpp:57]
[task 2020-07-17T04:04:08.029Z] 04:04:08 INFO - GECKO(1707) | #34: main [browser/app/nsBrowserApp.cpp:303]
[task 2020-07-17T04:04:08.033Z] 04:04:08 INFO - fix-stacks error: failed to read breakpad symbols dir /builds/worker/workspace/build/symbols/libc.so.6 for /lib/x86_64-linux-gnu/libc.so.6
[task 2020-07-17T04:04:08.037Z] 04:04:08 INFO - fix-stacks note: this is expected and harmless for system libraries on debug automation runs
[task 2020-07-17T04:04:08.037Z] 04:04:08 INFO - GECKO(1707) | #35: __libc_start_main [/lib/x86_64-linux-gnu/libc.so.6 + 0x21b97]
[task 2020-07-17T04:04:08.038Z] 04:04:08 INFO - GECKO(1707) | #36: ??? [/builds/worker/workspace/build/application/firefox/firefox-bin + 0x10ac9]
[task 2020-07-17T04:04:08.038Z] 04:04:08 INFO - GECKO(1707) | #37: ??? (???:???)
[task 2020-07-17T04:04:08.038Z] 04:04:08 INFO - GECKO(1707) | [Parent 1707, Breakpad Server] WARNING: Resource acquired is being released in non-LIFO order; why?
[task 2020-07-17T04:04:08.039Z] 04:04:08 INFO - GECKO(1707) | : file /builds/worker/checkouts/gecko/xpcom/threads/BlockingResourceBase.cpp, line 292
[task 2020-07-17T04:04:08.039Z] 04:04:08 INFO - GECKO(1707) | --- Mutex : dumpSafetyLock (currently acquired)
[task 2020-07-17T04:04:08.039Z] 04:04:08 INFO - GECKO(1707) | calling context
[task 2020-07-17T04:04:08.040Z] 04:04:08 INFO - GECKO(1707) | [stack trace unavailable]
[task 2020-07-17T04:04:08.040Z] 04:04:08 ERROR - GECKO(1707) | A content process crashed and MOZ_CRASHREPORTER_SHUTDOWN is set, shutting down
[task 2020-07-17T04:04:08.040Z] 04:04:08 INFO - GECKO(1707) | [Parent 1707, Main Thread] WARNING: IPC message discarded: actor cannot send: file /builds/worker/checkouts/gecko/ipc/glue/ProtocolUtils.cpp, line 470
[task 2020-07-17T04:04:08.041Z] 04:04:08 INFO - GECKO(1707) | [Parent 1707, Main Thread] WARNING: IPC message discarded: actor cannot send: file /builds/worker/checkouts/gecko/ipc/glue/ProtocolUtils.cpp, line 470
[task 2020-07-17T04:04:08.041Z] 04:04:08 INFO - GECKO(1707) | [Parent 1707, Main Thread] WARNING: IPC message discarded: actor cannot send: file /builds/worker/checkouts/gecko/ipc/glue/ProtocolUtils.cpp, line 470
[task 2020-07-17T04:04:08.041Z] 04:04:08 INFO - GECKO(1707) | [Parent 1707, Main Thread] WARNING: IPC message discarded: actor cannot send: file /builds/worker/checkouts/gecko/ipc/glue/ProtocolUtils.cpp, line 470
[task 2020-07-17T04:04:08.041Z] 04:04:08 INFO - GECKO(1707) | [Parent 1707, Main Thread] WARNING: IPC message discarded: actor cannot send: file /builds/worker/checkouts/gecko/ipc/glue/ProtocolUtils.cpp, line 470
[task 2020-07-17T04:04:08.042Z] 04:04:08 INFO - GECKO(1707) | [Parent 1707, Main Thread] WARNING: IPC message discarded: actor cannot send: file /builds/worker/checkouts/gecko/ipc/glue/ProtocolUtils.cpp, line 470
[task 2020-07-17T04:04:08.042Z] 04:04:08 INFO - GECKO(1707) | [Parent 1707, Main Thread] WARNING: IPC message discarded: actor cannot send: file /builds/worker/checkouts/gecko/ipc/glue/ProtocolUtils.cpp, line 470
[task 2020-07-17T04:04:08.044Z] 04:04:08 INFO - GECKO(1707) | [Parent 1707, Main Thread] WARNING: IPC message discarded: actor cannot send: file /builds/worker/checkouts/gecko/ipc/glue/ProtocolUtils.cpp, line 470
[task 2020-07-17T04:04:08.045Z] 04:04:08 INFO - GECKO(1707) | [Parent 1707, Main Thread] WARNING: IPC message discarded: actor cannot send: file /builds/worker/checkouts/gecko/ipc/glue/ProtocolUtils.cpp, line 470
[task 2020-07-17T04:04:08.045Z] 04:04:08 INFO - GECKO(1707) | [Parent 1707, Main Thread] WARNING: IPC message discarded: actor cannot send: file /builds/worker/checkouts/gecko/ipc/glue/ProtocolUtils.cpp, line 470
[task 2020-07-17T04:04:08.045Z] 04:04:08 INFO - GECKO(1707) | [Parent 1707, Main Thread] WARNING: IPC message discarded: actor cannot send: file /builds/worker/checkouts/gecko/ipc/glue/ProtocolUtils.cpp, line 470
[task 2020-07-17T04:04:08.045Z] 04:04:08 INFO - GECKO(1707) | [Parent 1707, URL Classifier] WARNING: 'NS_FAILED(rv)', file /builds/worker/checkouts/gecko/netwerk/url-classifier/AsyncUrlChannelClassifier.cpp, line 243
[task 2020-07-17T04:04:08.052Z] 04:04:08 INFO - GECKO(1707) | [Parent 1707, URL Classifier] WARNING: 'NS_FAILED(rv)', file /builds/worker/checkouts/gecko/netwerk/url-classifier/AsyncUrlChannelClassifier.cpp, line 243
[task 2020-07-17T04:04:08.052Z] 04:04:08 INFO - GECKO(1707) | [Parent 1707, URL Classifier] WARNING: 'NS_FAILED(rv)', file /builds/worker/checkouts/gecko/netwerk/url-classifier/AsyncUrlChannelClassifier.cpp, line 243
[task 2020-07-17T04:04:08.052Z] 04:04:08 INFO - GECKO(1707) | [Parent 1707, URL Classifier] WARNING: 'NS_FAILED(rv)', file /builds/worker/checkouts/gecko/netwerk/url-classifier/AsyncUrlChannelClassifier.cpp, line 243
[task 2020-07-17T04:04:08.053Z] 04:04:08 INFO - GECKO(1707) | [Parent 1707, URL Classifier] WARNING: 'NS_FAILED(rv)', file /builds/worker/checkouts/gecko/netwerk/url-classifier/AsyncUrlChannelClassifier.cpp, line 243
[task 2020-07-17T04:04:08.053Z] 04:04:08 INFO - GECKO(1707) | [Parent 1707, URL Classifier] WARNING: 'NS_FAILED(rv)', file /builds/worker/checkouts/gecko/netwerk/url-classifier/AsyncUrlChannelClassifier.cpp, line 243
[task 2020-07-17T04:04:08.053Z] 04:04:08 INFO - GECKO(1707) | [Parent 1707, URL Classifier] WARNING: 'NS_FAILED(rv)', file /builds/worker/checkouts/gecko/netwerk/url-classifier/AsyncUrlChannelClassifier.cpp, line 243
[task 2020-07-17T04:04:08.053Z] 04:04:08 INFO - GECKO(1707) | [Parent 1707, URL Classifier] WARNING: 'NS_FAILED(rv)', file /builds/worker/checkouts/gecko/netwerk/url-classifier/AsyncUrlChannelClassifier.cpp, line 243
[task 2020-07-17T04:04:08.053Z] 04:04:08 INFO - GECKO(1707) | [Parent 1707, URL Classifier] WARNING: 'NS_FAILED(rv)', file /builds/worker/checkouts/gecko/netwerk/url-classifier/AsyncUrlChannelClassifier.cpp, line 243
[task 2020-07-17T04:04:08.053Z] 04:04:08 INFO - GECKO(1707) | [Parent 1707, URL Classifier] WARNING: 'NS_FAILED(rv)', file /builds/worker/checkouts/gecko/netwerk/url-classifier/AsyncUrlChannelClassifier.cpp, line 243
[task 2020-07-17T04:04:08.053Z] 04:04:08 INFO - GECKO(1707) | [GPU 1745, Compositor] WARNING: Possibly dropping task posted to updater thread: file /builds/worker/checkouts/gecko/gfx/layers/apz/src/APZUpdater.cpp, line 370
[task 2020-07-17T04:04:08.053Z] 04:04:08 INFO - GECKO(1707) | ###!!! [Parent][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost

Comment 7

[Intermittent Failures Robot]

22 failures in 867 pushes (0.025 failures/push) were associated with this bug yesterday.

Repository breakdown:

• autoland: 8
• mozilla-central: 12
• try: 2

Platform breakdown:

• linux1804-64-qr: 16
• linux1804-64: 6

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1427811&startday=2020-07-17&endday=2020-07-17&tree=all

Comment 8

[Cristina Coroiu [:ccoroiu]]

Retriggers: https://treeherder.mozilla.org/#/jobs?repo=autoland&group_state=expanded&resultStatus=success%2Ctestfailed%2Cbusted%2Cexception%2Cusercancel%2Crunning%2Cpending%2Crunnable&tochange=ec1edb45cb1faafc517e15b5521a972776a114f1&searchStr=mochitest%2Cplain%2Cfis%2C11&fromchange=9798ec66761db13c28cf2e91785dcaf0135d75e8&selectedTaskRun=DzLhRxptQlWya4TW0msoTw.0

https://hg.mozilla.org/integration/autoland/rev/67c817715469874d90a95d5e5f603edec22e5c61

Kris, it seems that from your push started to frequently fail, can you please take a look? Thank you

Comment 9

[Intermittent Failures Robot]

43 failures in 4014 pushes (0.011 failures/push) were associated with this bug in the last 7 days.

This is the #24 most frequent failure this week.

** This failure happened more than 30 times this week! Resolving this bug is a high priority. **

** Try to resolve this bug as soon as possible. If unresolved for 2 weeks, the affected test(s) may be disabled. **

Repository breakdown:

• autoland: 25
• mozilla-central: 16
• try: 2

Platform breakdown:

• windows10-64: 1
• linux1804-64-qr: 34
• linux1804-64: 8

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1427811&startday=2020-07-13&endday=2020-07-19&tree=all

Comment 10

[Kris Maglione [:kmag]]

The crash from comment 6 is in no way related to this bug.

Comment 11

[Andreea Pavel [:apavel]]

James can you please assign someone to take a look?

Comment 12

[Intermittent Failures Robot]

20 failures in 725 pushes (0.028 failures/push) were associated with this bug yesterday.

Repository breakdown:

• autoland: 9
• mozilla-central: 3
• try: 7
• mozilla-esr78: 1

Platform breakdown:

• linux1804-64-qr: 13
• linux1804-64: 7

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1427811&startday=2020-07-20&endday=2020-07-20&tree=all

Comment 13

[James Teh [:Jamie]]

The crash in comment 6 (which I assume is the same crash in the other intermittent failures on CI) is not related to accessibility. That is, even though it's the same assertion, the code path is very different to comment 0. This bug is about an assertion triggered by accessibility, whereas comment 6 (the intermittent failures) is an assertion triggered by something else (DOM?). I think a separate bug should be filed for those intermittents.

Comment 14

[Andreea Pavel [:apavel]]

Filed bug 1655011.
Will close this as worksforme so it doesn't get suggested anymore.
Thank you.

Comment 15

[James Teh [:Jamie]]

This a11y bug is still valid, even though it's not causing intermittent failures. So, I don't think it should be closed. Is there some way we can leave it open without it becoming a suggestion for the unrelated intermittent failures?

Comment 16

[Andreea Pavel [:apavel]]

(In reply to James Teh [:Jamie] from comment #15)

This a11y bug is still valid, even though it's not causing intermittent failures. So, I don't think it should be closed. Is there some way we can leave it open without it becoming a suggestion for the unrelated intermittent failures?

Will see if these changes help. If not, we'll update the summary again. Thanks!

Comment 17

[Intermittent Failures Robot]

27 failures in 4310 pushes (0.006 failures/push) were associated with this bug in the last 7 days.

This is the #50 most frequent failure this week.

Repository breakdown:

• autoland: 12
• mozilla-central: 4
• try: 10
• mozilla-esr78: 1

Platform breakdown:

• linux1804-64-qr: 16
• linux1804-64: 11

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1427811&startday=2020-07-20&endday=2020-07-26&tree=all

Comment 18

[Intermittent Failures Robot]

2 failures in 3125 pushes (0.001 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 2

Platform and build breakdown:

• windows7-32: 2
  • debug: 2

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1427811&startday=2021-03-29&endday=2021-04-04&tree=all

Comment 19

[Andreea Pavel [:apavel]]

Retriggers: https://treeherder.mozilla.org/jobs?repo=autoland&searchStr=OS%2CX%2C10.15%2CWebRender%2Cdebug%2CMochitests%2Cwith%2Cfission%2Cenabled%2Ctest-macosx1015-64-qr%2Fdebug-mochitest-browser-chrome-fis-e10s%2Cbc4&tochange=16b385e15fadb643e032340a5781501fa4f65289&fromchange=b50ef8e31c4c2dd8993366c68c2f6f87e5a4f68a&group_state=expanded&selectedTaskRun=LcP7KnofTXOiDP5PZdEukQ.0

Nika, can you please take a look?

Comment 20

[Intermittent Failures Robot]

17 failures in 604 pushes (0.028 failures/push) were associated with this bug yesterday.

Repository breakdown:

• autoland: 13
• mozilla-central: 4

Platform and build breakdown:

• linux1804-64-qr: 8
  • debug: 8
• macosx1015-64-qr: 7
  • debug: 7
• windows10-64-2004-qr: 2
  • debug: 2

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1427811&startday=2021-09-14&endday=2021-09-14&tree=all

Comment 21

[Intermittent Failures Robot]

48 failures in 654 pushes (0.073 failures/push) were associated with this bug yesterday.

Repository breakdown:

• autoland: 29
• mozilla-central: 18
• try: 1

Platform and build breakdown:

• macosx1015-64-qr: 12
  • debug: 12
• linux1804-64-qr: 19
  • debug: 19
• windows10-64-2004-qr: 17
  • debug: 17

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1427811&startday=2021-09-15&endday=2021-09-15&tree=all

Comment 22

[Intermittent Failures Robot]

26 failures in 504 pushes (0.052 failures/push) were associated with this bug yesterday.

Repository breakdown:

• autoland: 22
• mozilla-central: 4

Platform and build breakdown:

• linux1804-64-qr: 12
  • debug: 12
• macosx1015-64-qr: 8
  • debug: 8
• windows10-64-2004-qr: 6
  • debug: 6

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1427811&startday=2021-09-16&endday=2021-09-16&tree=all

Comment 23

[Intermittent Failures Robot]

95 failures in 3375 pushes (0.028 failures/push) were associated with this bug in the last 7 days.

This is the #7 most frequent failure this week.

** This failure happened more than 75 times this week! Resolving this bug is a very high priority. **

** Try to resolve this bug as soon as possible. If unresolved for 1 week, the affected test(s) may be disabled. **

Repository breakdown:

• autoland: 67
• mozilla-central: 27
• try: 1

Platform and build breakdown:

• macosx1015-64-qr: 28
  • debug: 28
• linux1804-64-qr: 42
  • debug: 42
• windows10-64-2004-qr: 25
  • debug: 25

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1427811&startday=2021-09-13&endday=2021-09-19&tree=all

Comment 24

[Marian-Vasile Laza]

here have been 73 total failures in the last 7 days, recent failure log.
Affected platforms are:

• linux1804-64-qr
• macosx1015-64-qr
• windows10-64-2004-qr

Comment 25

[James Teh [:Jamie]]

This stack seems to be missing some useful frames. :( Is there some reason a Document would now return null for GetDocumentURI() or GetDocShell() while calling OnStateChange listeners during nsDocLoader::doStopDocumentLoad when it didn't return null before?

Comment 26

[Nika Layzell [:nika] (ni? for response)]

(In reply to James Teh [:Jamie] from comment #25)

This stack seems to be missing some useful frames. :( Is there some reason a Document would now return null for GetDocumentURI() or GetDocShell() while calling OnStateChange listeners during nsDocLoader::doStopDocumentLoad when it didn't return null before?

The triggering bug caused some slight timing changes which may have had this impact, though I don't know enough about how this situation is encountered to know for sure.

Comment 27

[James Teh [:Jamie]]

Attachment: Bug 1427811: Add null checks to some a11y document logging functions.

Comment 28

[James Teh [:Jamie]]

It's worth noting that this new spike is different again to the fuzzing issue described in comment 0. I'm putting the patch here because this is where the intermittents are being tracked, but assuming this fixes the spike, the issue in comment 0 still isn't fixed.

Comment 29

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/185a799962ec
Add null checks to some a11y document logging functions. r=eeejay

Comment 30

[Atila Butkovits]

https://hg.mozilla.org/mozilla-central/rev/185a799962ec

Comment 31

[James Teh [:Jamie]]

Reopening this because the issue found by fuzzing described in comment 0 still isn't fixed. Unfortunately, this signature is broad enough that intermittents keep landing here for other instances of this assertion.

Comment 32

[Intermittent Failures Robot]

7 failures in 3304 pushes (0.002 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-central: 7

Platform and build breakdown:

• linux1804-64-qr: 3
  • debug: 3
• macosx1015-64-qr: 2
  • debug: 2
• windows10-64-2004-qr: 2
  • debug: 2

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1427811&startday=2022-03-14&endday=2022-03-20&tree=all

Comment 33

[Intermittent Failures Robot]

4 failures in 3323 pushes (0.001 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• try: 4

Platform and build breakdown:

• linux1804-64-qr: 4
  • debug: 4

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1427811&startday=2022-03-28&endday=2022-04-03&tree=all

Comment 34

[Intermittent Failures Robot]

1 failures in 3034 pushes (0.0 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-central: 1

Platform and build breakdown:

• linux1804-64-qr: 1
  • debug: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1427811&startday=2022-10-10&endday=2022-10-16&tree=all

Comment 35

[Intermittent Failures Robot]

2 failures in 2793 pushes (0.001 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 2

Platform and build breakdown:

• linux1804-64-qr: 1
  • debug: 1
• windows10-64-2004-qr: 1
  • debug: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1427811&startday=2022-10-17&endday=2022-10-23&tree=all

Comment 36

[Intermittent Failures Robot]

3 failures in 3558 pushes (0.001 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 2
• try: 1

Platform and build breakdown:

• linux1804-64-qr: 3
  • debug: 3

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1427811&startday=2022-12-12&endday=2022-12-18&tree=all

Comment 37

[Intermittent Failures Robot]

1 failures in 3076 pushes (0.0 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 1

Platform and build breakdown:

• windows11-64-2009-qr: 1
  • debug: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1427811&startday=2023-08-14&endday=2023-08-20&tree=all

Comment 38

[Intermittent Failures Robot]

1 failures in 3356 pushes (0.0 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-beta: 1

Platform and build breakdown:

• linux1804-64-qr: 1
  • debug: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1427811&startday=2023-10-30&endday=2023-11-05&tree=all