(hiding my local username pasted)

(clobbering didn't help)

This is really blocking me, is there anyone willing to take a look soon? No idea if this is GFX or IPC generic, moving to a different component. (Re-submitting comment 0, in case not visible to all) debug build of up to date m-c (not clobbered for some time), win10 x64, running from inside visual studio. started today, first observed with yesterday sources. short after start fails on MOZ_RELEASE_ASSERT(aResult->mDestinationProcessId == base::GetCurrentProcId()); aResult->mDestinationProcessId is already dead (no process of that pid found). ### XPCOM_MEM_BLOAT_LOG defined -- logging bloat/leaks to c:\mozilla\leaks\leaks.log [453252, Main Thread] WARNING: CheckLinkStatus called on main thread! No check performed. Assuming link is up, status is unknown.: file c:/Mozilla/src/mozilla-central2/netwerk/system/win32/nsNotifyAddrListener.cpp, line 710 Unable to read VR Path Registry from C:\Users\XXXXXXXX\AppData\Local\openvr\openvrpaths.vrpath ###!!! [Child][MessageChannel::SendAndWait] Error: Channel error: cannot send/recv Crash Annotation GraphicsCriticalError: |[0][GFX1-]: Failed to create remote compositor (t=44.4686) [GFX1-]: Failed to create remote compositor [GFX2-]: Could not acquire an MLGDevice! Crash Annotation GraphicsCriticalError: |[0][GFX1-]: Failed to create remote compositor (t=44.4686) |[1][GFX1-]: [D3D11] failed to get compositor device. (t=44.5594) [GFX1-]: [D3D11] failed to get compositor device. Crash Annotation GraphicsCriticalError: |[0][GFX1-]: Failed to create remote compositor (t=44.4686) |[1][GFX1-]: [D3D11] failed to get compositor device. (t=44.5594) |[2][GFX1-]: [D3D11] Failed to init compositor with reason: FEATURE_FAILURE_D3D11_NO_DEVICE (t=44.5594) [GFX1-]: [D3D11] Failed to init compositor with reason: FEATURE_FAILURE_D3D11_NO_DEVICE Assertion failure: aResult->mDestinationProcessId == base::GetCurrentProcId(), at c:\_\obj\mozilla-central2\_obj-browser-debug\dist\include\mozilla/ipc/Transport_win.h:80 #01: IPC::ParamTraits<mozilla::ipc::TransportDescriptor>::Read (c:\_\obj\mozilla-central2\_obj-browser-debug\dist\include\mozilla\ipc\transport_win.h:80) #02: IPC::ReadParam<mozilla::ipc::TransportDescriptor> (c:\mozilla\src\mozilla-central2\ipc\chromium\src\chrome\common\ipc_message_utils.h:122) #03: IPC::ParamTraits<mozilla::ipc::Endpoint<mozilla::ipc::PBackgroundParent> >::Read (c:\_\obj\mozilla-central2\_obj-browser-debug\dist\include\mozilla\ipc\protocolutils.h:854) #04: IPC::ReadParam<mozilla::ipc::Endpoint<mozilla::ipc::PBackgroundParent> > (c:\mozilla\src\mozilla-central2\ipc\chromium\src\chrome\common\ipc_message_utils.h:122) #05: mozilla::dom::PContentParent::Read<mozilla::ipc::Endpoint<mozilla::ipc::PBackgroundParent> > (c:\_\obj\mozilla-central2\_obj-browser-debug\ipc\ipdl\_ipdlheaders\mozilla\dom\pcontentparent.h:2284) #06: mozilla::dom::PContentParent::OnMessageReceived (c:\_\obj\mozilla-central2\_obj-browser-debug\ipc\ipdl\pcontentparent.cpp:3570) #07: mozilla::ipc::MessageChannel::DispatchAsyncMessage (c:\mozilla\src\mozilla-central2\ipc\glue\messagechannel.cpp:2110) #08: mozilla::ipc::MessageChannel::DispatchMessageW (c:\mozilla\src\mozilla-central2\ipc\glue\messagechannel.cpp:2042) #09: mozilla::ipc::MessageChannel::RunMessage (c:\mozilla\src\mozilla-central2\ipc\glue\messagechannel.cpp:1887) #10: mozilla::ipc::MessageChannel::MessageTask::Run (c:\mozilla\src\mozilla-central2\ipc\glue\messagechannel.cpp:1920) #11: nsThread::ProcessNextEvent (c:\mozilla\src\mozilla-central2\xpcom\threads\nsthread.cpp:1041) #12: NS_ProcessNextEvent (c:\mozilla\src\mozilla-central2\xpcom\threads\nsthreadutils.cpp:517) #13: mozilla::ipc::MessagePump::Run (c:\mozilla\src\mozilla-central2\ipc\glue\messagepump.cpp:97) #14: MessageLoop::RunInternal (c:\mozilla\src\mozilla-central2\ipc\chromium\src\base\message_loop.cc:327) #15: MessageLoop::RunHandler (c:\mozilla\src\mozilla-central2\ipc\chromium\src\base\message_loop.cc:320) #16: MessageLoop::Run (c:\mozilla\src\mozilla-central2\ipc\chromium\src\base\message_loop.cc:300) #17: nsBaseAppShell::Run (c:\mozilla\src\mozilla-central2\widget\nsbaseappshell.cpp:159) #18: nsAppShell::Run (c:\mozilla\src\mozilla-central2\widget\windows\nsappshell.cpp:344) #19: nsAppStartup::Run (c:\mozilla\src\mozilla-central2\toolkit\components\startup\nsappstartup.cpp:288) #20: XREMain::XRE_mainRun (c:\mozilla\src\mozilla-central2\toolkit\xre\nsapprunner.cpp:4673) #21: XREMain::XRE_main (c:\mozilla\src\mozilla-central2\toolkit\xre\nsapprunner.cpp:4808) #22: XRE_main (c:\mozilla\src\mozilla-central2\toolkit\xre\nsapprunner.cpp:4900) #23: mozilla::BootstrapImpl::XRE_main (c:\mozilla\src\mozilla-central2\toolkit\xre\bootstrap.cpp:50) #24: do_main (c:\mozilla\src\mozilla-central2\browser\app\nsbrowserapp.cpp:232) #25: NS_internal_main (c:\mozilla\src\mozilla-central2\browser\app\nsbrowserapp.cpp:304) #26: wmain (c:\mozilla\src\mozilla-central2\toolkit\xre\nswindowswmain.cpp:112) #27: __scrt_common_main_seh (f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:283) #28: BaseThreadInitThunk[C:\WINDOWS\System32\KERNEL32.DLL +0x11fe4] #29: RtlUserThreadStart[C:\WINDOWS\SYSTEM32\ntdll.dll +0x6efb1]

One more info: MOZ_ASSERT_UNREACHABLE("Child cannot create widget compositor!"); at: > xul.dll!mozilla::layers::CompositorManagerParent::AllocPCompositorBridgeParent({...}) Line 231 C++ Symbols loaded. xul.dll!mozilla::layers::PCompositorManagerParent::OnMessageReceived({...}) Line 157 C++ Symbols loaded. xul.dll!mozilla::ipc::MessageChannel::DispatchAsyncMessage({...}) Line 2110 C++ Symbols loaded. xul.dll!mozilla::ipc::MessageChannel::DispatchMessageW({...}) Line 2042 C++ Symbols loaded. xul.dll!mozilla::ipc::MessageChannel::RunMessage({...}) Line 1887 C++ Symbols loaded. xul.dll!mozilla::ipc::MessageChannel::MessageTask::Run() Line 1920 C++ Symbols loaded. xul.dll!MessageLoop::RunTask({...}) Line 453 C++ Symbols loaded. xul.dll!MessageLoop::DeferOrRunPendingTask({...}) Line 463 C++ Symbols loaded. xul.dll!MessageLoop::DoWork() Line 535 C++ Symbols loaded. xul.dll!base::MessagePumpForUI::DoRunLoop() Line 210 C++ Symbols loaded. xul.dll!base::MessagePumpWin::RunWithDispatcher(0x0000009ea7fff760, 0x0000000000000000) Line 58 C++ Symbols loaded. xul.dll!base::MessagePumpWin::Run(0x0000009ea7fff760) Line 80 C++ Symbols loaded. xul.dll!MessageLoop::RunInternal() Line 327 C++ Symbols loaded. xul.dll!MessageLoop::RunHandler() Line 320 C++ Symbols loaded. xul.dll!MessageLoop::Run() Line 300 C++ Symbols loaded. xul.dll!base::Thread::ThreadMain() Line 184 C++ Symbols loaded. On the "Compositor" thread, assuming the compositor process. And this happens also when I run this outside a debugger (directly).

Alex, can you please look at this? I bisected to your bug. Thanks. This is a total development blocker for me!

I'm pretty sure this is the same as bug 1438209 -- can you try with the patch there?

Confirmed, thanks!