This bug was filed from the Socorro interface and is report bp-01412a57-8b3a-4d07-ad51-4a2640180917. ============================================================= Top 10 frames of crashing thread: 0 ntdll.dll ntdll.dll@0x9d7e4 1 ntdll.dll ntdll.dll@0x1ef18 2 kernelbase.dll SleepConditionVariableSRW 3 mozglue.dll mozilla::detail::ConditionVariableImpl::wait mozglue/misc/ConditionVariable_windows.cpp:58 4 xul.dll mozilla::ThreadEventQueue<mozilla::PrioritizedEventQueue<mozilla::EventQueue> >::GetEvent xpcom/threads/ThreadEventQueue.cpp:168 5 xul.dll nsThread::ProcessNextEvent xpcom/threads/nsThread.cpp:1093 6 xul.dll NS_ProcessNextEvent xpcom/threads/nsThreadUtils.cpp:519 7 xul.dll static bool mozilla::SpinEventLoopUntil<mozilla::ProcessFailureBehavior::ReportToCaller, `lambda at z:/build/build/src/dom/quota/ActorsParent.cpp:2862:3'> xpcom/threads/nsThreadUtils.h:334 8 xul.dll mozilla::dom::quota::QuotaManager::ShutdownObserver::Observe dom/quota/ActorsParent.cpp:2862 9 xul.dll nsObserverService::NotifyObservers xpcom/ds/nsObserverService.cpp:295

Here is a query which picks up all the crashes: https://bit.ly/2pe9vi4. Philipp - any ideas? So far I haven't seen a clear correlation in the various reports.

according to the proto signature this is likely the same issue as in bug 1487194, but we are missing symbols for some system libraries again after a windows patchday...