There is a spike in crashes in trunk from 4.0b9pre/20101220. It is #11 top crasher in this build. Signature mozilla::ipc::RPCChannel::EnteredCxxStack() UUID 2f3e6c16-5977-4408-926f-fde432101221 Time 2010-12-21 14:34:50.970048 Uptime 1323 Install Age 94185 seconds (1.1 days) since version was first installed. Product Firefox Version 4.0b9pre Build ID 20101220030345 Branch 2.0 OS Windows NT OS Version 5.1.2600 Service Pack 3 CPU x86 CPU Info GenuineIntel family 6 model 22 stepping 1 Crash Reason EXCEPTION_ACCESS_VIOLATION_READ Crash Address 0x0 User Comments App Notes AdapterVendorID: 8086, AdapterDeviceID: 2772 MSAFD Tcpip [TCP/IP] : 2 : 1 : MSAFD Tcpip [UDP/IP] : 2 : 2 : %SystemRoot%\system32\mswsock.dll MSAFD Tcpip [RAW/IP] : 2 : 3 : %SystemRoot%\system32\mswsock.dll RSVP UDP Service Provider : 6 : 2 : %SystemRoot%\system32\rsvpsp.dll RSVP TCP Service Provider : 6 : 1 : %SystemRoot%\system32\rsvpsp.dll MSAFD NetBIOS [\Device\NetBT_Tcpip_{615A3EAF-B746-4D9A-AE63-5F66F435D5BF}] SEQPACKET 3 : 2 : 5 : %SystemRoot%\system32\mswsock.dll MSAFD NetBIOS [\Device\NetBT_Tcpip_{615A3EAF-B746-4D9A-AE63-5F66F435D5BF}] DATAGRAM 3 : 2 : 2 : %SystemRoot%\system32\mswsock.dll MSAFD NetBIOS [\Device\NetBT_Tcpip_{673D42EF-F9AA-42B9-AFB5-941849A61281}] SEQPACKET 0 : 2 : 5 : %SystemRoot%\system32\mswsock.dll MSAFD NetBIOS [\Device\NetBT_Tcpip_{673D42EF-F9AA-42B9-AFB5-941849A61281}] DATAGRAM 0 : 2 : 2 : %SystemRoot%\system32\mswsock.dll MSAFD NetBIOS [\Device\NetBT_Tcpip_{F4D8BFF8-C6FB-4AB8-857D-B1EB95444B50}] SEQPACKET 1 : 2 : 5 : %SystemRoot%\syste Frame Module Signature [Expand] Source 0 xul.dll mozilla::ipc::RPCChannel::EnteredCxxStack obj-firefox/dist/include/mozilla/ipc/RPCChannel.h:222 1 xul.dll mozilla::ipc::RPCChannel::CxxStackFrame::CxxStackFrame obj-firefox/dist/include/mozilla/ipc/RPCChannel.h:275 2 xul.dll mozilla::ipc::RPCChannel::Call ipc/glue/RPCChannel.cpp:167 3 xul.dll mozilla::plugins::PPluginInstanceParent::CallUpdateWindow obj-firefox/ipc/ipdl/PPluginInstanceParent.cpp:793 4 xul.dll nsWindow::OnPaint 5 ntdll.dll RtlpAdjustHeapLookasideDepth 6 ntdll.dll RtlpAdjustHeapLookasideDepth 7 @0xc074 8 user32.dll _FindProp 9 user32.dll _GetProp 10 xul.dll nsCOMPtr_base::assign_from_qi obj-firefox/xpcom/build/nsCOMPtr.cpp:96 11 xul.dll nsIMM32Handler::ProcessMessage widget/src/windows/nsIMM32Handler.cpp:401 12 xul.dll nsWindow::WindowProc widget/src/windows/nsWindow.cpp:4409 13 @0x0 14 xul.dll nsIMM32Handler::ProcessMessage widget/src/windows/nsIMM32Handler.cpp:401 15 xul.dll xul.dll@0x3565bd 16 user32.dll InternalCallWinProc 17 xul.dll nsIMM32Handler::ProcessMessage widget/src/windows/nsIMM32Handler.cpp:401 18 xul.dll nsIMM32Handler::ProcessMessage widget/src/windows/nsIMM32Handler.cpp:401 19 mozsqlite3.dll mozsqlite3.dll@0x14d 20 xul.dll nsIMM32Handler::ProcessMessage widget/src/windows/nsIMM32Handler.cpp:401 21 kernel32.dll InternalFindAtom 22 user32.dll StringDuplicateW 23 user32.dll CallWindowProcW 24 xul.dll mozilla::plugins::PluginInstanceParent::PluginWindowHookProc dom/plugins/PluginInstanceParent.cpp:1251 25 user32.dll InternalCallWinProc 26 user32.dll UserCallWinProcCheckWow 27 user32.dll CallWindowProcAorW 28 user32.dll CallWindowProcW 29 xul.dll PluginWndProc modules/plugin/base/src/nsPluginNativeWindowWin.cpp:358 30 user32.dll InternalCallWinProc 31 user32.dll UserCallWinProcCheckWow 32 user32.dll DispatchClientMessage 33 user32.dll __fnDWORD 34 ntdll.dll KiUserCallbackDispatcher 35 xul.dll gfxTextRun::ResetGlyphRuns obj-firefox/dist/include/gfxFont.h:1879 36 user32.dll TestWindowProcess 37 user32.dll DispatchMessageW 38 xul.dll nsBaseAppShell::OnProcessNextEvent widget/src/xpwidgets/nsBaseAppShell.cpp:315 39 xul.dll nsTArray_base<nsTArrayDefaultAllocator>::ShiftData obj-firefox/dist/include/nsTArray-inl.h:169 40 xul.dll MessageLoop::DeferOrRunPendingTask ipc/chromium/src/base/message_loop.cc:351 41 nspr4.dll PR_AssertCurrentThreadOwnsLock nsprpub/pr/src/threads/combined/prulock.c:404 42 nspr4.dll PR_AssertCurrentThreadOwnsLock nsprpub/pr/src/threads/combined/prulock.c:404 43 xul.dll mozilla::ipc::MessagePump::Run ipc/glue/MessagePump.cpp:110 44 xul.dll MessageLoop::RunHandler ipc/chromium/src/base/message_loop.cc:202 45 xul.dll MessageLoop::Run ipc/chromium/src/base/message_loop.cc:176 46 xul.dll nsBaseAppShell::Run widget/src/xpwidgets/nsBaseAppShell.cpp:192 47 xul.dll xul.dll@0xb159d3 48 xul.dll nsAppStartup::Run toolkit/components/startup/src/nsAppStartup.cpp:191 49 xul.dll XRE_main toolkit/xre/nsAppRunner.cpp:3691 50 firefox.exe wmain toolkit/xre/nsWindowsWMain.cpp:128 51 firefox.exe __tmainCRTStartup obj-firefox/memory/jemalloc/crtsrc/crtexe.c:591 52 kernel32.dll BaseProcessStart The regression range for the spike is: http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=be8006fc9c4a&tochange=fc50c521bf48 More reports at: http://crash-stats.mozilla.com/report/list?product=Firefox&query_search=signature&query_type=exact&query=&range_value=4&range_unit=weeks&hang_type=any&process_type=any&plugin_field=&plugin_query_type=&plugin_query=&do_query=1&admin=&signature=mozilla%3A%3Aipc%3A%3ARPCChannel%3A%3AEnteredCxxStack%28%29

At first glance this looks like we're painting a plugin window which we've already destroyed.

Looks fixed per https://bugzilla.mozilla.org/show_bug.cgi?id=620794#c4: http://crash-stats.mozilla.com/report/list?product=Firefox&query_search=signature&query_type=exact&query=mozilla%3A%3Aipc%3A%3ARPCChannel%3A%3AEnteredCxxStack%28%29&date=01%2F02%2F2011%2016%3A49%3A10&range_value=2&range_unit=weeks&hang_type=any&process_type=any&plugin_field=&plugin_query_type=&plugin_query=&do_query=1&admin=&signature=mozilla%3A%3Aipc%3A%3ARPCChannel%3A%3AEnteredCxxStack%28%29 No crashes in a build later than 12/23.

As per today's meeting, beta 9 will be a time-based release. Marking these all betaN+. Please move it back to beta9+ if you believe it MUST be in the next beta (ie: trunk is in an unshippable state without this)