1690374 - Assertion failure: CurrentState().pushedClips.Length() > 0, at /builds/worker/checkouts/gecko/gfx/thebes/gfxContext.cpp:518

Status: RESOLVED FIXED

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

Description

[Jason Kratzer [:jkratzer]]

Attachment: testcase.zip

Testcase found while fuzzing mozilla-central rev 57bcdf857d44 (built with --enable-debug).

Assertion failure: CurrentState().pushedClips.Length() > 0, at /builds/worker/checkouts/gecko/gfx/thebes/gfxContext.cpp:518

    #0 0x7f10a74380a8 in gfxContext::PopClip() /builds/worker/checkouts/gecko/gfx/thebes/gfxContext.cpp:518:3
    #1 0x7f10aaa06169 in nsDisplayMasksAndClipPaths::PaintAsLayer(nsDisplayListBuilder*, gfxContext*, mozilla::layers::LayerManager*) /builds/worker/checkouts/gecko/layout/painting/nsDisplayList.cpp:9459:12
    #2 0x7f10aa9ab839 in PaintInactiveLayer /builds/worker/checkouts/gecko/layout/painting/FrameLayerBuilder.cpp:4264:54
    #3 0x7f10aa9ab839 in mozilla::FrameLayerBuilder::PaintItems(std::vector<mozilla::AssignedDisplayItem, std::allocator<mozilla::AssignedDisplayItem> >&, mozilla::gfx::IntRectTyped<mozilla::gfx::UnknownUnits> const&, gfxContext*, nsDisplayListBuilder*, nsPresContext*, mozilla::gfx::IntPointTyped<mozilla::gfx::UnknownUnits> const&, float, float) /builds/worker/checkouts/gecko/layout/painting/FrameLayerBuilder.cpp:7150:7
    #4 0x7f10aa9adba1 in mozilla::FrameLayerBuilder::DrawPaintedLayer(mozilla::layers::PaintedLayer*, gfxContext*, mozilla::gfx::IntRegionTyped<mozilla::gfx::UnknownUnits> const&, mozilla::gfx::IntRegionTyped<mozilla::gfx::UnknownUnits> const&, mozilla::layers::DrawRegionClip, mozilla::gfx::IntRegionTyped<mozilla::gfx::UnknownUnits> const&, void*) /builds/worker/checkouts/gecko/layout/painting/FrameLayerBuilder.cpp:7330:19
    #5 0x7f10a72e6301 in mozilla::layers::BasicPaintedLayer::PaintThebes(gfxContext*, mozilla::layers::Layer*, void (*)(mozilla::layers::PaintedLayer*, gfxContext*, mozilla::gfx::IntRegionTyped<mozilla::gfx::UnknownUnits> const&, mozilla::gfx::IntRegionTyped<mozilla::gfx::UnknownUnits> const&, mozilla::layers::DrawRegionClip, mozilla::gfx::IntRegionTyped<mozilla::gfx::UnknownUnits> const&, void*), void*) /builds/worker/checkouts/gecko/gfx/layers/basic/BasicPaintedLayer.cpp:92:9
    #6 0x7f10a72e33e9 in mozilla::layers::BasicLayerManager::PaintSelfOrChildren(mozilla::layers::PaintLayerContext&, gfxContext*) /builds/worker/checkouts/gecko/gfx/layers/basic/BasicLayerManager.cpp:701:13
    #7 0x7f10a72e2237 in mozilla::layers::BasicLayerManager::PaintLayer(gfxContext*, mozilla::layers::Layer*, void (*)(mozilla::layers::PaintedLayer*, gfxContext*, mozilla::gfx::IntRegionTyped<mozilla::gfx::UnknownUnits> const&, mozilla::gfx::IntRegionTyped<mozilla::gfx::UnknownUnits> const&, mozilla::layers::DrawRegionClip, mozilla::gfx::IntRegionTyped<mozilla::gfx::UnknownUnits> const&, void*), void*) /builds/worker/checkouts/gecko/gfx/layers/basic/BasicLayerManager.cpp
    #8 0x7f10a72e32b2 in mozilla::layers::BasicLayerManager::PaintSelfOrChildren(mozilla::layers::PaintLayerContext&, gfxContext*) /builds/worker/checkouts/gecko/gfx/layers/basic/BasicLayerManager.cpp:724:7
    #9 0x7f10a72e2237 in mozilla::layers::BasicLayerManager::PaintLayer(gfxContext*, mozilla::layers::Layer*, void (*)(mozilla::layers::PaintedLayer*, gfxContext*, mozilla::gfx::IntRegionTyped<mozilla::gfx::UnknownUnits> const&, mozilla::gfx::IntRegionTyped<mozilla::gfx::UnknownUnits> const&, mozilla::layers::DrawRegionClip, mozilla::gfx::IntRegionTyped<mozilla::gfx::UnknownUnits> const&, void*), void*) /builds/worker/checkouts/gecko/gfx/layers/basic/BasicLayerManager.cpp
    #10 0x7f10a72dffa7 in mozilla::layers::BasicLayerManager::EndTransactionInternal(void (*)(mozilla::layers::PaintedLayer*, gfxContext*, mozilla::gfx::IntRegionTyped<mozilla::gfx::UnknownUnits> const&, mozilla::gfx::IntRegionTyped<mozilla::gfx::UnknownUnits> const&, mozilla::layers::DrawRegionClip, mozilla::gfx::IntRegionTyped<mozilla::gfx::UnknownUnits> const&, void*), void*, mozilla::layers::LayerManager::EndTransactionFlags) /builds/worker/checkouts/gecko/gfx/layers/basic/BasicLayerManager.cpp:610:5
    #11 0x7f10aa9e0dd3 in nsDisplayList::PaintRoot(nsDisplayListBuilder*, gfxContext*, unsigned int) /builds/worker/checkouts/gecko/layout/painting/nsDisplayList.cpp:2556:19
    #12 0x7f10aa643e32 in nsLayoutUtils::PaintFrame(gfxContext*, nsIFrame*, nsRegion const&, unsigned int, nsDisplayListBuilderMode, nsLayoutUtils::PaintFrameFlags) /builds/worker/checkouts/gecko/layout/base/nsLayoutUtils.cpp:3429:13
    #13 0x7f10aa9ea71f in GenerateAndPushTextMask(nsIFrame*, gfxContext*, nsRect const&, nsDisplayListBuilder*) /builds/worker/checkouts/gecko/layout/painting/nsDisplayList.cpp:327:3
    #14 0x7f10aa9ea2c5 in nsDisplayBackgroundImage::PaintInternal(nsDisplayListBuilder*, gfxContext*, nsRect const&, nsRect*) /builds/worker/checkouts/gecko/layout/painting/nsDisplayList.cpp:4140:10
    #15 0x7f10a71eda12 in mozilla::layers::PaintItemByDrawTarget(nsDisplayItem*, mozilla::gfx::DrawTarget*, mozilla::gfx::PointTyped<mozilla::LayoutDevicePixel, float> const&, mozilla::gfx::IntRectTyped<mozilla::gfx::UnknownUnits> const&, nsDisplayListBuilder*, RefPtr<mozilla::layers::BasicLayerManager> const&, mozilla::gfx::SizeTyped<mozilla::gfx::UnknownUnits, float> const&, mozilla::Maybe<mozilla::gfx::DeviceColor>&) /builds/worker/checkouts/gecko/gfx/layers/wr/WebRenderCommandBuilder.cpp:2082:38
    #16 0x7f10a71ec289 in mozilla::layers::WebRenderCommandBuilder::GenerateFallbackData(nsDisplayItem*, mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&, mozilla::layers::StackingContextHelper const&, nsDisplayListBuilder*, mozilla::gfx::RectTyped<mozilla::LayoutDevicePixel, float>&) /builds/worker/checkouts/gecko/gfx/layers/wr/WebRenderCommandBuilder.cpp:2301:28
    #17 0x7f10a71e9741 in mozilla::layers::WebRenderCommandBuilder::PushItemAsImage(nsDisplayItem*, mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&, mozilla::layers::StackingContextHelper const&, nsDisplayListBuilder*) /builds/worker/checkouts/gecko/gfx/layers/wr/WebRenderCommandBuilder.cpp:2608:48
    #18 0x7f10a71e828f in mozilla::layers::WebRenderCommandBuilder::CreateWebRenderCommandsFromDisplayList(nsDisplayList*, nsDisplayItem*, nsDisplayListBuilder*, mozilla::layers::StackingContextHelper const&, mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&) /builds/worker/checkouts/gecko/gfx/layers/wr/WebRenderCommandBuilder.cpp:1782:7
    #19 0x7f10aa9f4aae in CreateWebRenderCommands /builds/worker/checkouts/gecko/layout/painting/nsDisplayList.cpp:5666:30
    #20 0x7f10aa9f4aae in nsDisplayBlendMode::CreateWebRenderCommands(mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&, mozilla::layers::StackingContextHelper const&, mozilla::layers::RenderRootStateManager*, nsDisplayListBuilder*) /builds/worker/checkouts/gecko/layout/painting/nsDisplayList.cpp:6143:29
    #21 0x7f10a71e964c in mozilla::layers::WebRenderCommandBuilder::CreateWebRenderCommands(nsDisplayItem*, mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&, mozilla::layers::StackingContextHelper const&, nsDisplayListBuilder*) /builds/worker/checkouts/gecko/gfx/layers/wr/WebRenderCommandBuilder.cpp:1659:41
    #22 0x7f10a71e828f in mozilla::layers::WebRenderCommandBuilder::CreateWebRenderCommandsFromDisplayList(nsDisplayList*, nsDisplayItem*, nsDisplayListBuilder*, mozilla::layers::StackingContextHelper const&, mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&) /builds/worker/checkouts/gecko/gfx/layers/wr/WebRenderCommandBuilder.cpp:1782:7
    #23 0x7f10aa9f56d0 in CreateWebRenderCommands /builds/worker/checkouts/gecko/layout/painting/nsDisplayList.cpp:5666:30
    #24 0x7f10aa9f56d0 in nsDisplayBlendContainer::CreateWebRenderCommands(mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&, mozilla::layers::StackingContextHelper const&, mozilla::layers::RenderRootStateManager*, nsDisplayListBuilder*) /builds/worker/checkouts/gecko/layout/painting/nsDisplayList.cpp:6274:29
    #25 0x7f10a71e964c in mozilla::layers::WebRenderCommandBuilder::CreateWebRenderCommands(nsDisplayItem*, mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&, mozilla::layers::StackingContextHelper const&, nsDisplayListBuilder*) /builds/worker/checkouts/gecko/gfx/layers/wr/WebRenderCommandBuilder.cpp:1659:41
    #26 0x7f10a71e828f in mozilla::layers::WebRenderCommandBuilder::CreateWebRenderCommandsFromDisplayList(nsDisplayList*, nsDisplayItem*, nsDisplayListBuilder*, mozilla::layers::StackingContextHelper const&, mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&) /builds/worker/checkouts/gecko/gfx/layers/wr/WebRenderCommandBuilder.cpp:1782:7
    #27 0x7f10aaa06f36 in CreateWebRenderCommands /builds/worker/checkouts/gecko/layout/painting/nsDisplayList.cpp:5666:30
    #28 0x7f10aaa06f36 in nsDisplayMasksAndClipPaths::CreateWebRenderCommands(mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&, mozilla::layers::StackingContextHelper const&, mozilla::layers::RenderRootStateManager*, nsDisplayListBuilder*) /builds/worker/checkouts/gecko/layout/painting/nsDisplayList.cpp:9625:25
    #29 0x7f10a71e964c in mozilla::layers::WebRenderCommandBuilder::CreateWebRenderCommands(nsDisplayItem*, mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&, mozilla::layers::StackingContextHelper const&, nsDisplayListBuilder*) /builds/worker/checkouts/gecko/gfx/layers/wr/WebRenderCommandBuilder.cpp:1659:41
    #30 0x7f10a71e828f in mozilla::layers::WebRenderCommandBuilder::CreateWebRenderCommandsFromDisplayList(nsDisplayList*, nsDisplayItem*, nsDisplayListBuilder*, mozilla::layers::StackingContextHelper const&, mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&) /builds/worker/checkouts/gecko/gfx/layers/wr/WebRenderCommandBuilder.cpp:1782:7
    #31 0x7f10aaa06f36 in CreateWebRenderCommands /builds/worker/checkouts/gecko/layout/painting/nsDisplayList.cpp:5666:30
    #32 0x7f10aaa06f36 in nsDisplayMasksAndClipPaths::CreateWebRenderCommands(mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&, mozilla::layers::StackingContextHelper const&, mozilla::layers::RenderRootStateManager*, nsDisplayListBuilder*) /builds/worker/checkouts/gecko/layout/painting/nsDisplayList.cpp:9625:25
    #33 0x7f10a71e964c in mozilla::layers::WebRenderCommandBuilder::CreateWebRenderCommands(nsDisplayItem*, mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&, mozilla::layers::StackingContextHelper const&, nsDisplayListBuilder*) /builds/worker/checkouts/gecko/gfx/layers/wr/WebRenderCommandBuilder.cpp:1659:41
    #34 0x7f10a71e828f in mozilla::layers::WebRenderCommandBuilder::CreateWebRenderCommandsFromDisplayList(nsDisplayList*, nsDisplayItem*, nsDisplayListBuilder*, mozilla::layers::StackingContextHelper const&, mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&) /builds/worker/checkouts/gecko/gfx/layers/wr/WebRenderCommandBuilder.cpp:1782:7
    #35 0x7f10aa9f5fc1 in CreateWebRenderCommands /builds/worker/checkouts/gecko/layout/painting/nsDisplayList.cpp:5666:30
    #36 0x7f10aa9f5fc1 in nsDisplayOwnLayer::CreateWebRenderCommands(mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&, mozilla::layers::StackingContextHelper const&, mozilla::layers::RenderRootStateManager*, nsDisplayListBuilder*) /builds/worker/checkouts/gecko/layout/painting/nsDisplayList.cpp:6415:22
    #37 0x7f10a71e964c in mozilla::layers::WebRenderCommandBuilder::CreateWebRenderCommands(nsDisplayItem*, mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&, mozilla::layers::StackingContextHelper const&, nsDisplayListBuilder*) /builds/worker/checkouts/gecko/gfx/layers/wr/WebRenderCommandBuilder.cpp:1659:41
    #38 0x7f10a71e828f in mozilla::layers::WebRenderCommandBuilder::CreateWebRenderCommandsFromDisplayList(nsDisplayList*, nsDisplayItem*, nsDisplayListBuilder*, mozilla::layers::StackingContextHelper const&, mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&) /builds/worker/checkouts/gecko/gfx/layers/wr/WebRenderCommandBuilder.cpp:1782:7
    #39 0x7f10a71e6d1b in mozilla::layers::WebRenderCommandBuilder::BuildWebRenderCommands(mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&, nsDisplayList*, nsDisplayListBuilder*, mozilla::layers::WebRenderScrollData&, WrFiltersHolder&&) /builds/worker/checkouts/gecko/gfx/layers/wr/WebRenderCommandBuilder.cpp:1585:5
    #40 0x7f10a71f7046 in mozilla::layers::WebRenderLayerManager::EndTransactionWithoutLayer(nsDisplayList*, nsDisplayListBuilder*, WrFiltersHolder&&, mozilla::layers::WebRenderBackgroundData*) /builds/worker/checkouts/gecko/gfx/layers/wr/WebRenderLayerManager.cpp:368:30
    #41 0x7f10aa9e0c5d in nsDisplayList::PaintRoot(nsDisplayListBuilder*, gfxContext*, unsigned int) /builds/worker/checkouts/gecko/layout/painting/nsDisplayList.cpp:2475:18
    #42 0x7f10aa643e32 in nsLayoutUtils::PaintFrame(gfxContext*, nsIFrame*, nsRegion const&, unsigned int, nsDisplayListBuilderMode, nsLayoutUtils::PaintFrameFlags) /builds/worker/checkouts/gecko/layout/base/nsLayoutUtils.cpp:3429:13
    #43 0x7f10aa5bca0c in mozilla::PresShell::Paint(nsView*, nsRegion const&, mozilla::PaintFlags) /builds/worker/checkouts/gecko/layout/base/PresShell.cpp:6392:5
    #44 0x7f10aa2824af in nsViewManager::ProcessPendingUpdatesPaint(nsIWidget*) /builds/worker/checkouts/gecko/view/nsViewManager.cpp:459:18
    #45 0x7f10aa281fa3 in nsViewManager::ProcessPendingUpdatesForView(nsView*, bool) /builds/worker/checkouts/gecko/view/nsViewManager.cpp:394:22
    #46 0x7f10aa28340f in nsViewManager::ProcessPendingUpdates() /builds/worker/checkouts/gecko/view/nsViewManager.cpp:972:5
    #47 0x7f10aa57c10f in nsRefreshDriver::Tick(mozilla::layers::BaseTransactionId<mozilla::VsyncIdType>, mozilla::TimeStamp) /builds/worker/checkouts/gecko/layout/base/nsRefreshDriver.cpp:2376:11
    #48 0x7f10aa583301 in TickDriver /builds/worker/checkouts/gecko/layout/base/nsRefreshDriver.cpp:357:13
    #49 0x7f10aa583301 in mozilla::RefreshDriverTimer::TickRefreshDrivers(mozilla::layers::BaseTransactionId<mozilla::VsyncIdType>, mozilla::TimeStamp, nsTArray<RefPtr<nsRefreshDriver> >&) /builds/worker/checkouts/gecko/layout/base/nsRefreshDriver.cpp:336:7
    #50 0x7f10aa5831df in mozilla::RefreshDriverTimer::Tick(mozilla::layers::BaseTransactionId<mozilla::VsyncIdType>, mozilla::TimeStamp) /builds/worker/checkouts/gecko/layout/base/nsRefreshDriver.cpp:351:5
    #51 0x7f10aa582788 in RunRefreshDrivers /builds/worker/checkouts/gecko/layout/base/nsRefreshDriver.cpp:799:5
    #52 0x7f10aa582788 in mozilla::VsyncRefreshDriverTimer::RefreshDriverVsyncObserver::TickRefreshDriver(mozilla::layers::BaseTransactionId<mozilla::VsyncIdType>, mozilla::TimeStamp) /builds/worker/checkouts/gecko/layout/base/nsRefreshDriver.cpp:722:16
    #53 0x7f10aa5820a0 in mozilla::VsyncRefreshDriverTimer::RefreshDriverVsyncObserver::NotifyParentProcessVsync() /builds/worker/checkouts/gecko/layout/base/nsRefreshDriver.cpp:624:7
    #54 0x7f10aa581b19 in mozilla::VsyncRefreshDriverTimer::RefreshDriverVsyncObserver::NotifyVsync(mozilla::VsyncEvent const&) /builds/worker/checkouts/gecko/layout/base/nsRefreshDriver.cpp:545:9
    #55 0x7f10a9d6fb16 in mozilla::dom::VsyncChild::RecvNotify(mozilla::VsyncEvent const&, float const&) /builds/worker/checkouts/gecko/dom/ipc/VsyncChild.cpp:68:15
    #56 0x7f10a6ab4a80 in mozilla::dom::PVsyncChild::OnMessageReceived(IPC::Message const&) /builds/worker/workspace/obj-build/ipc/ipdl/PVsyncChild.cpp:178:54
    #57 0x7f10a685741c in mozilla::ipc::PBackgroundChild::OnMessageReceived(IPC::Message const&) /builds/worker/workspace/obj-build/ipc/ipdl/PBackgroundChild.cpp:6286:32
    #58 0x7f10a650d23e in mozilla::ipc::MessageChannel::DispatchAsyncMessage(mozilla::ipc::ActorLifecycleProxy*, IPC::Message const&) /builds/worker/checkouts/gecko/ipc/glue/MessageChannel.cpp:2153:25
    #59 0x7f10a65097bd in mozilla::ipc::MessageChannel::DispatchMessage(IPC::Message&&) /builds/worker/checkouts/gecko/ipc/glue/MessageChannel.cpp:2077:9
    #60 0x7f10a650ac66 in mozilla::ipc::MessageChannel::RunMessage(mozilla::ipc::MessageChannel::MessageTask&) /builds/worker/checkouts/gecko/ipc/glue/MessageChannel.cpp:1925:3
    #61 0x7f10a650b9ab in mozilla::ipc::MessageChannel::MessageTask::Run() /builds/worker/checkouts/gecko/ipc/glue/MessageChannel.cpp:1956:13
    #62 0x7f10a5bd8adf in mozilla::RunnableTask::Run() /builds/worker/checkouts/gecko/xpcom/threads/TaskController.cpp:472:16
    #63 0x7f10a5bd7053 in mozilla::TaskController::DoExecuteNextTaskOnlyMainThreadInternal(mozilla::detail::BaseAutoLock<mozilla::Mutex&> const&) /builds/worker/checkouts/gecko/xpcom/threads/TaskController.cpp:753:26
    #64 0x7f10a5bd5eb4 in mozilla::TaskController::ExecuteNextTaskOnlyMainThreadInternal(mozilla::detail::BaseAutoLock<mozilla::Mutex&> const&) /builds/worker/checkouts/gecko/xpcom/threads/TaskController.cpp:611:15
    #65 0x7f10a5bd6067 in mozilla::TaskController::ProcessPendingMTTask(bool) /builds/worker/checkouts/gecko/xpcom/threads/TaskController.cpp:395:36
    #66 0x7f10a5bdc679 in operator() /builds/worker/checkouts/gecko/xpcom/threads/TaskController.cpp:136:37
    #67 0x7f10a5bdc679 in mozilla::detail::RunnableFunction<mozilla::TaskController::InitializeInternal()::$_4>::Run() /builds/worker/workspace/obj-build/dist/include/nsThreadUtils.h:534:5
    #68 0x7f10a5bedae7 in nsThread::ProcessNextEvent(bool, bool*) /builds/worker/checkouts/gecko/xpcom/threads/nsThread.cpp:1158:16
    #69 0x7f10a5bf3f2a in NS_ProcessNextEvent(nsIThread*, bool) /builds/worker/checkouts/gecko/xpcom/threads/nsThreadUtils.cpp:548:10
    #70 0x7f10a6512ad4 in mozilla::ipc::MessagePump::Run(base::MessagePump::Delegate*) /builds/worker/checkouts/gecko/ipc/glue/MessagePump.cpp:109:5
    #71 0x7f10a647e463 in MessageLoop::RunInternal() /builds/worker/checkouts/gecko/ipc/chromium/src/base/message_loop.cc:335:10
    #72 0x7f10a647e37d in RunHandler /builds/worker/checkouts/gecko/ipc/chromium/src/base/message_loop.cc:328:3
    #73 0x7f10a647e37d in MessageLoop::Run() /builds/worker/checkouts/gecko/ipc/chromium/src/base/message_loop.cc:310:3
    #74 0x7f10aa2cecb8 in nsBaseAppShell::Run() /builds/worker/checkouts/gecko/widget/nsBaseAppShell.cpp:137:27
    #75 0x7f10abb13bb3 in XRE_RunAppShell() /builds/worker/checkouts/gecko/toolkit/xre/nsEmbedFunctions.cpp:902:20
    #76 0x7f10a6513a0c in mozilla::ipc::MessagePumpForChildProcess::Run(base::MessagePump::Delegate*) /builds/worker/checkouts/gecko/ipc/glue/MessagePump.cpp:237:9
    #77 0x7f10a647e463 in MessageLoop::RunInternal() /builds/worker/checkouts/gecko/ipc/chromium/src/base/message_loop.cc:335:10
    #78 0x7f10a647e37d in RunHandler /builds/worker/checkouts/gecko/ipc/chromium/src/base/message_loop.cc:328:3
    #79 0x7f10a647e37d in MessageLoop::Run() /builds/worker/checkouts/gecko/ipc/chromium/src/base/message_loop.cc:310:3
    #80 0x7f10abb13788 in XRE_InitChildProcess(int, char**, XREChildData const*) /builds/worker/checkouts/gecko/toolkit/xre/nsEmbedFunctions.cpp:733:34
    #81 0x55cd473b6f76 in content_process_main /builds/worker/checkouts/gecko/browser/app/../../ipc/contentproc/plugin-container.cpp:57:28
    #82 0x55cd473b6f76 in main /builds/worker/checkouts/gecko/browser/app/nsBrowserApp.cpp:306:18
    #83 0x7f10bb4320b2 in __libc_start_main /build/glibc-eX1tMB/glibc-2.31/csu/../csu/libc-start.c:308:16

Comment 1

[Bugmon [:jkratzer for issues]]

Bugmon Analysis:
Unable to reproduce bug using the following builds:

mozilla-central 20210202214809-5ff587e0026f
mozilla-central 20210202033500-babdc3b3a300
Removing bugmon keyword as no further action possible.
Please review the bug and re-add the keyword for further analysis.

Comment 2

[Andrew Osmond [:aosmond] (he/him)]

Assert is tripped creating a blob image, not clear if that is required however.

Comment 3

[Tyson Smith [:tsmith]]

A Pernosco session is available here: https://pernos.co/debug/wy0Fktz1fs1ezpkEWSNkFw/index.html

Comment 4

[Mayank Bansal]

I got a crash from the testcase : https://crash-stats.mozilla.org/report/index/1cb3e879-6c58-4a9c-8451-480a10210203#tab-bugzilla

Comment 5

[Jeff Muizelaar [:jrmuizel]]

Thanks Pernosco!

This is caused by this aContext->Save()
https://searchfox.org/mozilla-central/rev/400614dec36182ba6d0bec2a18044c47df960a1f/gfx/layers/basic/BasicLayerManager.cpp#100
Not being matched by a aContext->Restore() in the error case.

Comment 6

[Jeff Muizelaar [:jrmuizel]]

This was fixed by bug 1691147