Assertion failure: aFrame->HasAnyStateBits(NS_FRAME_HAS_MULTI_COLUMN_ANCESTOR) (Should only be called if the frame has a multi-column ancestor!), at src/layout/base/nsCSSFrameConstructor.cpp:575

#0 GetMultiColumnContainingBlockFor(nsIFrame*) src/layout/base/nsCSSFrameConstructor.cpp:582:3
#1 nsCSSFrameConstructor::AppendFramesToParent(nsFrameConstructorState&, nsContainerFrame*, nsFrameItems&, nsIFrame*, bool) src/layout/base/nsCSSFrameConstructor.cpp:5948:27
#2 nsCSSFrameConstructor::ContentRangeInserted(nsIContent*, nsIContent*, nsILayoutHistoryState*, nsCSSFrameConstructor::InsertionKind) src/layout/base/nsCSSFrameConstructor.cpp:7343:7
#3 nsCSSFrameConstructor::RecreateFramesForContent(nsIContent*, nsCSSFrameConstructor::InsertionKind) src/layout/base/nsCSSFrameConstructor.cpp:8688:7
#4 mozilla::RestyleManager::ProcessRestyledFrames(nsStyleChangeList&) src/layout/base/RestyleManager.cpp:1582:25
#5 mozilla::RestyleManager::DoProcessPendingRestyles(mozilla::ServoTraversalFlags) src/layout/base/RestyleManager.cpp:3108:9
#6 mozilla::PresShell::DoFlushPendingNotifications(mozilla::ChangesToFlush) src/layout/base/PresShell.cpp:4123:39
#7 nsRefreshDriver::Tick(mozilla::layers::BaseTransactionId<mozilla::VsyncIdType>, mozilla::TimeStamp) src/layout/base/nsRefreshDriver.cpp:1887:18
#8 mozilla::RefreshDriverTimer::TickRefreshDrivers(mozilla::layers::BaseTransactionId<mozilla::VsyncIdType>, mozilla::TimeStamp, nsTArray<RefPtr<nsRefreshDriver> >&) src/layout/base/nsRefreshDriver.cpp:319:7
#9 mozilla::RefreshDriverTimer::Tick(mozilla::layers::BaseTransactionId<mozilla::VsyncIdType>, mozilla::TimeStamp) src/layout/base/nsRefreshDriver.cpp:336:5
#10 mozilla::VsyncRefreshDriverTimer::RefreshDriverVsyncObserver::TickRefreshDriver(mozilla::layers::BaseTransactionId<mozilla::VsyncIdType>, mozilla::TimeStamp) src/layout/base/nsRefreshDriver.cpp:697:16
#11 mozilla::VsyncRefreshDriverTimer::RefreshDriverVsyncObserver::NotifyVsync(mozilla::VsyncEvent const&) src/layout/base/nsRefreshDriver.cpp:592:9
#12 mozilla::layout::VsyncChild::RecvNotify(mozilla::VsyncEvent const&) src/layout/ipc/VsyncChild.cpp:65:16
#13 mozilla::layout::PVsyncChild::OnMessageReceived(IPC::Message const&) src/obj-firefox/ipc/ipdl/PVsyncChild.cpp:168:54
#14 mozilla::ipc::PBackgroundChild::OnMessageReceived(IPC::Message const&) src/obj-firefox/ipc/ipdl/PBackgroundChild.cpp:2828:28
#15 mozilla::ipc::MessageChannel::DispatchAsyncMessage(IPC::Message const&) src/ipc/glue/MessageChannel.cpp:2151:21
#16 mozilla::ipc::MessageChannel::DispatchMessage(IPC::Message&&) src/ipc/glue/MessageChannel.cpp:2078:9
#17 mozilla::ipc::MessageChannel::RunMessage(mozilla::ipc::MessageChannel::MessageTask&) src/ipc/glue/MessageChannel.cpp:1937:3
#18 mozilla::ipc::MessageChannel::MessageTask::Run() src/ipc/glue/MessageChannel.cpp:1968:13
#19 nsThread::ProcessNextEvent(bool, bool*) src/xpcom/threads/nsThread.cpp:1179:14
#20 NS_ProcessNextEvent(nsIThread*, bool) src/xpcom/threads/nsThreadUtils.cpp:482:10
#21 mozilla::ipc::MessagePump::Run(base::MessagePump::Delegate*) src/ipc/glue/MessagePump.cpp:88:21
#22 MessageLoop::RunInternal() src/ipc/chromium/src/base/message_loop.cc:315:10
#23 MessageLoop::Run() src/ipc/chromium/src/base/message_loop.cc:290:3
#24 nsBaseAppShell::Run() src/widget/nsBaseAppShell.cpp:137:27
#25 XRE_RunAppShell() src/toolkit/xre/nsEmbedFunctions.cpp:933:20
#26 mozilla::ipc::MessagePumpForChildProcess::Run(base::MessagePump::Delegate*) src/ipc/glue/MessagePump.cpp:238:9
#27 MessageLoop::RunInternal() src/ipc/chromium/src/base/message_loop.cc:315:10
#28 MessageLoop::Run() src/ipc/chromium/src/base/message_loop.cc:290:3
#29 XRE_InitChildProcess(int, char**, XREChildData const*) src/toolkit/xre/nsEmbedFunctions.cpp:771:34
#30 content_process_main(mozilla::Bootstrap*, int, char**) src/browser/app/../../ipc/contentproc/plugin-container.cpp:56:28
#31 main src/browser/app/nsBrowserApp.cpp:265:18

TY, please let me know if you are already watching this component and don't need needinfos. :-)

TY, please let me know if you are already watching this component and don't need needinfos. :-)

Yes, I'm watching Layout: Columns.

The test case in comment 0 contains <fieldset> and column-span:all style. It can be fixed by bug 1535200. Test added there should be sufficient.