1639145 - Crash in [@ mozilla::layers::CompositorBridgeParent::NotifyWebRenderContextPurge]

Status: RESOLVED FIXED

(Core :: Graphics: WebRender, defect, P3)

Description

[Alex Chronopoulos [:achronop]]

This bug is for crash report bp-4473119b-807d-4b85-8608-719460200518.

Top 9 frames of crashing thread:

0 libxul.so mozilla::layers::CompositorBridgeParent::NotifyWebRenderContextPurge gfx/layers/ipc/CompositorBridgeParent.cpp:2507
1 libxul.so RunnableFunction<void  ipc/chromium/src/base/task.h:324
2 libxul.so nsThread::ProcessNextEvent xpcom/threads/nsThread.cpp:1211
3 libxul.so mozilla::ipc::MessagePumpForNonMainThreads::Run xpcom/threads/nsThreadUtils.cpp:501
4 libxul.so MessageLoop::Run ipc/chromium/src/base/message_loop.cc:290
5 libxul.so nsThread::ThreadFunc xpcom/threads/nsThread.cpp:444
6 libnspr4.so _pt_root nsprpub/pr/src/pthreads/ptthread.c:201
7 libpthread.so.0 start_thread 
8 libc.so.6 __GI___clone 

This started crashing close after the land of Bug 1575008.

Comment 1

[Dzmitry Malyshau [:kvark]]

Hmm, doesn't look obviously related. Would be great to know what "about:support" looks like on that machine.

Comment 2

[Dzmitry Malyshau [:kvark]]

Moving as it doesn't appear to be related to WebGPU, looking by the code (thanks to JeffM).

Comment 3

[Sotaro Ikeda [:sotaro]]

It seems that nullptr access happened there. mWrBridge is cleared during closing a window.

Comment 4

[Sotaro Ikeda [:sotaro]]

Attachment: Bug 1639145 - Add nullptr check to CompositorBridgeParent::NotifyWebRenderContextPurge()

Comment 5

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/9a840b47f67a
Add nullptr check to CompositorBridgeParent::NotifyWebRenderContextPurge() r=jrmuizel

Comment 6

[Natalia Csoregi [:nataliaCs]]

https://hg.mozilla.org/mozilla-central/rev/9a840b47f67a