Reduced with m-c: BuildID=20180614094457 SourceStamp=91db0c695f0272f00bf92c81c471a85101056d96 Assertion failure: !aAncestor (We should have exited this loop earlier), at src/layout/painting/nsDisplayList.cpp:1664 #0 nsDisplayListBuilder::CreateClipChainIntersection(mozilla::DisplayItemClipChain const*, mozilla::DisplayItemClipChain const*, mozilla::DisplayItemClipChain const*) src/layout/painting/nsDisplayList.cpp:1664:7 #1 mozilla::DisplayListClipState::GetCurrentCombinedClipChain(nsDisplayListBuilder*) src/layout/painting/DisplayListClipState.cpp:26:15 #2 nsDisplayItem::nsDisplayItem(nsDisplayListBuilder*, nsIFrame*, mozilla::ActiveScrolledRoot const*, bool) src/layout/painting/nsDisplayList.cpp:3100:38 #3 nsDisplayEventReceiver::nsDisplayEventReceiver(nsDisplayListBuilder*, nsIFrame*) src/layout/painting/nsDisplayList.h:4739:7 #4 nsDisplayCompositorHitTestInfo::nsDisplayCompositorHitTestInfo(nsDisplayListBuilder*, nsIFrame*, mozilla::gfx::CompositorHitTestInfo, unsigned int, mozilla::Maybe<nsRect> const&) src/layout/painting/nsDisplayList.cpp:5028:5 #5 nsDisplayCompositorHitTestInfo* MakeDisplayItem<nsDisplayCompositorHitTestInfo, nsIFrame*&, mozilla::gfx::CompositorHitTestInfo&>(nsDisplayListBuilder*, nsIFrame*&, mozilla::gfx::CompositorHitTestInfo&) src/layout/painting/nsDisplayList.h:2003:28 #6 nsDisplayListBuilder::BuildCompositorHitTestInfoIfNeeded(nsIFrame*, nsDisplayList*, bool) src/layout/painting/nsDisplayList.cpp:2261:5 #7 nsIFrame::BuildDisplayListForChild(nsDisplayListBuilder*, nsIFrame*, nsDisplayListSet const&, unsigned int) src/layout/generic/nsFrame.cpp:3793:15 #8 nsContainerFrame::BuildDisplayListForNonBlockChildren(nsDisplayListBuilder*, nsDisplayListSet const&, unsigned int) src/layout/generic/nsContainerFrame.cpp:389:5 #9 nsInlineFrame::BuildDisplayList(nsDisplayListBuilder*, nsDisplayListSet const&) src/layout/generic/nsInlineFrame.cpp:241:3 #10 nsIFrame::BuildDisplayListForChild(nsDisplayListBuilder*, nsIFrame*, nsDisplayListSet const&, unsigned int) src/layout/generic/nsFrame.cpp:3778:14 #11 DisplayLine(nsDisplayListBuilder*, nsRect const&, nsLineList_iterator&, int, int&, nsDisplayListSet const&, nsBlockFrame*, mozilla::css::TextOverflow*, unsigned int) src/layout/generic/nsBlockFrame.cpp:6651:13 #12 nsBlockFrame::BuildDisplayList(nsDisplayListBuilder*, nsDisplayListSet const&) src/layout/generic/nsBlockFrame.cpp:6746:7 #13 nsIFrame::BuildDisplayListForChild(nsDisplayListBuilder*, nsIFrame*, nsDisplayListSet const&, unsigned int) src/layout/generic/nsFrame.cpp:3778:14 #14 DisplayLine(nsDisplayListBuilder*, nsRect const&, nsLineList_iterator&, int, int&, nsDisplayListSet const&, nsBlockFrame*, mozilla::css::TextOverflow*, unsigned int) src/layout/generic/nsBlockFrame.cpp:6651:13 #15 nsBlockFrame::BuildDisplayList(nsDisplayListBuilder*, nsDisplayListSet const&) src/layout/generic/nsBlockFrame.cpp:6746:7 #16 nsSelectsAreaFrame::BuildDisplayListInternal(nsDisplayListBuilder*, nsDisplayListSet const&) src/layout/forms/nsSelectsAreaFrame.cpp:150:17 #17 nsSelectsAreaFrame::BuildDisplayList(nsDisplayListBuilder*, nsDisplayListSet const&) src/layout/forms/nsSelectsAreaFrame.cpp:135:5 #18 nsIFrame::BuildDisplayListForChild(nsDisplayListBuilder*, nsIFrame*, nsDisplayListSet const&, unsigned int) src/layout/generic/nsFrame.cpp:3778:14 #19 mozilla::ScrollFrameHelper::BuildDisplayList(nsDisplayListBuilder*, nsDisplayListSet const&) src/layout/generic/nsGfxScrollFrame.cpp:3640:15 #20 nsListControlFrame::BuildDisplayList(nsDisplayListBuilder*, nsDisplayListSet const&) src/layout/forms/nsListControlFrame.cpp:195:22 #21 nsIFrame::BuildDisplayListForStackingContext(nsDisplayListBuilder*, nsDisplayList*, bool*) src/layout/generic/nsFrame.cpp:3072:5 #22 BuildDisplayListForTopLayerFrame(nsDisplayListBuilder*, nsIFrame*, nsDisplayList*) src/layout/generic/ViewportFrame.cpp:133:11 #23 mozilla::ViewportFrame::BuildDisplayListForTopLayer(nsDisplayListBuilder*, nsDisplayList*) src/layout/generic/ViewportFrame.cpp:179:7 #24 mozilla::ViewportFrame::BuildDisplayList(nsDisplayListBuilder*, nsDisplayListSet const&) src/layout/generic/ViewportFrame.cpp:70:3 #25 nsIFrame::BuildDisplayListForStackingContext(nsDisplayListBuilder*, nsDisplayList*, bool*) src/layout/generic/nsFrame.cpp:3072:5 #26 nsLayoutUtils::PaintFrame(gfxContext*, nsIFrame*, nsRegion const&, unsigned int, nsDisplayListBuilderMode, nsLayoutUtils::PaintFrameFlags) src/layout/base/nsLayoutUtils.cpp:3721:17 #27 mozilla::PresShell::Paint(nsView*, nsRegion const&, unsigned int) src/layout/base/PresShell.cpp:6314:5 #28 nsViewManager::ProcessPendingUpdatesPaint(nsIWidget*) src/view/nsViewManager.cpp:480:19 #29 nsViewManager::ProcessPendingUpdatesForView(nsView*, bool) src/view/nsViewManager.cpp:412:33 #30 nsViewManager::ProcessPendingUpdates() src/view/nsViewManager.cpp:1102:5 #31 nsRefreshDriver::Tick(long, mozilla::TimeStamp) src/layout/base/nsRefreshDriver.cpp:2039:11 #32 mozilla::RefreshDriverTimer::TickRefreshDrivers(long, mozilla::TimeStamp, nsTArray<RefPtr<nsRefreshDriver> >&) src/layout/base/nsRefreshDriver.cpp:301:7 #33 mozilla::RefreshDriverTimer::Tick(long, mozilla::TimeStamp) src/layout/base/nsRefreshDriver.cpp:320:5 #34 mozilla::VsyncRefreshDriverTimer::RunRefreshDrivers(mozilla::TimeStamp) src/layout/base/nsRefreshDriver.cpp:760:5 #35 mozilla::VsyncRefreshDriverTimer::RefreshDriverVsyncObserver::TickRefreshDriver(mozilla::TimeStamp) src/layout/base/nsRefreshDriver.cpp:673:35 #36 mozilla::VsyncRefreshDriverTimer::RefreshDriverVsyncObserver::NotifyVsync(mozilla::TimeStamp) src/layout/base/nsRefreshDriver.cpp:574:9 #37 mozilla::layout::VsyncChild::RecvNotify(mozilla::TimeStamp const&) src/layout/ipc/VsyncChild.cpp:68:16 #38 mozilla::layout::PVsyncChild::OnMessageReceived(IPC::Message const&) src/obj-firefox/ipc/ipdl/PVsyncChild.cpp:167:20 #39 mozilla::ipc::PBackgroundChild::OnMessageReceived(IPC::Message const&) src/obj-firefox/ipc/ipdl/PBackgroundChild.cpp:1988:28 #40 mozilla::ipc::MessageChannel::DispatchAsyncMessage(IPC::Message const&) src/ipc/glue/MessageChannel.cpp:2134:25 #41 mozilla::ipc::MessageChannel::DispatchMessage(IPC::Message&&) src/ipc/glue/MessageChannel.cpp:2064:17 #42 mozilla::ipc::MessageChannel::RunMessage(mozilla::ipc::MessageChannel::MessageTask&) src/ipc/glue/MessageChannel.cpp:1910:5 #43 mozilla::ipc::MessageChannel::MessageTask::Run() src/ipc/glue/MessageChannel.cpp:1943:15 #44 nsThread::ProcessNextEvent(bool, bool*) src/xpcom/threads/nsThread.cpp:1088:14 #45 NS_ProcessNextEvent(nsIThread*, bool) src/xpcom/threads/nsThreadUtils.cpp:519:10 #46 mozilla::ipc::MessagePump::Run(base::MessagePump::Delegate*) src/ipc/glue/MessagePump.cpp:125:5 #47 MessageLoop::RunInternal() src/ipc/chromium/src/base/message_loop.cc:325:10 #48 MessageLoop::Run() src/ipc/chromium/src/base/message_loop.cc:298:3 #49 nsBaseAppShell::Run() src/widget/nsBaseAppShell.cpp:157:27 #50 XRE_RunAppShell() src/toolkit/xre/nsEmbedFunctions.cpp:896:22 #51 mozilla::ipc::MessagePumpForChildProcess::Run(base::MessagePump::Delegate*) src/ipc/glue/MessagePump.cpp:269:9 #52 MessageLoop::RunInternal() src/ipc/chromium/src/base/message_loop.cc:325:10 #53 MessageLoop::Run() src/ipc/chromium/src/base/message_loop.cc:298:3 #54 XRE_InitChildProcess(int, char**, XREChildData const*) src/toolkit/xre/nsEmbedFunctions.cpp:722:34 #55 content_process_main(mozilla::Bootstrap*, int, char**) src/browser/app/../../ipc/contentproc/plugin-container.cpp:50:30 #56 main src/browser/app/nsBrowserApp.cpp:287:18 #57 __libc_start_main /build/glibc-Cl5G7W/glibc-2.23/csu/../csu/libc-start.c:291 #58 _start (firefox+0x4236e4)