High crash occurrence for ui::AXTreeManager::GetTreeID

[Philby Dias]

Hello,

Ever since we upgraded our app from 114 to 126, we notice a lot of crash reports bearing the stack trace like:

 =======

Crashed: Thread: SIGSEGV  0x0000000000000020
#00 pc 0x3c82018 libchrome.so (ui::AXTreeManager::GetTreeID() const [unique_ptr.h:265]) (BuildId: bd819679621972f092f42e992536212342c10bde)
#01 pc 0x66db440 libchrome.so (ui::AXTreeManager::SetLastFocusedNode(ui::AXNode*) [ax_tree_manager.cc:199]) (BuildId: bd819679621972f092f42e992536212342c10bde)
#02 pc 0x3c84dc8 libchrome.so (content::BrowserAccessibilityManager::OnAccessibilityEvents(ui::AXUpdatesAndEvents const&) [browser_accessibility_manager.cc:542]) (BuildId: bd819679621972f092f42e992536212342c10bde)
#03 pc 0x40014bc libchrome.so (content::RenderFrameHostImpl::SendAccessibilityEventsToManager(ui::AXUpdatesAndEvents const&) [render_frame_host_impl.cc:7384]) (BuildId: bd819679621972f092f42e992536212342c10bde)
#04 pc 0x400b7fc libchrome.so (content::RenderFrameHostImpl::UpdateAXTreeData() [render_frame_host_impl.cc:11694]) (BuildId: bd819679621972f092f42e99

========

There are a couple of variants for this same crash, find the stack traces attached below. I could not find it in the known issues or fixes. Would greatly appreciate any help with this crash as the crash count is quite high.

Thank you in advance for your time and help.

Philby

[Alexei Svitkine]

This might be crbug.com/360919317. I'm not sure what the status of the bug is, since it's still open, but some changes have landed for it. It's possible it's fixed on TOT and your older M126 version doesn't have the changes? You should consider updating to a new version. You can also ask on the bug about the status.

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[Philby Dias]

Thank you for sharing this ticket! It does seem related and 126 does not have them, let me follow up there, thanks again.