Crash report: https://crash-stats.mozilla.org/report/index/97e90798-77eb-468c-ba74-498880220916

Reason: SIGSEGV / SEGV_MAPERR

Top 10 frames of crashing thread:

0 libc.so.6 __GI___pthread_mutex_lock /usr/src/debug/glibc/nptl/pthread_mutex_lock.c:80
1 firefox-bin mozilla::detail::MutexImpl::lock mozglue/misc/Mutex_posix.cpp:118
2 libxul.so MozContainerSurfaceLock::MozContainerSurfaceLock widget/gtk/MozContainerWayland.cpp:109
3 libxul.so mozilla::layers::NativeLayerRootWayland::UpdateLayersOnMainThread gfx/layers/NativeLayerWayland.cpp:295
4 libxul.so mozilla::detail::RunnableMethodImpl<mozilla::layers::NativeLayerRootWayland*, void  xpcom/threads/nsThreadUtils.h:1200
5 libxul.so mozilla::TaskController::DoExecuteNextTaskOnlyMainThreadInternal xpcom/threads/TaskController.cpp:851
6 libxul.so nsThread::ProcessNextEvent xpcom/threads/nsThread.cpp:1205
7 libxul.so mozilla::ipc::MessagePump::Run ipc/glue/MessagePump.cpp:85
8 libxul.so MessageLoop::Run ipc/chromium/src/base/message_loop.cc:356
9 libxul.so nsBaseAppShell::Run widget/nsBaseAppShell.cpp:150

It seems like we're trying to lock a mutex that is NULL.

Since the crash volume is low (less than 5 per week), the severity is downgraded to S3. Feel free to change it back if you think the bug is still critical.

For more information, please visit auto_nag documentation.