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:5952:27
#2 nsCSSFrameConstructor::ContentAppended(nsIContent*, nsCSSFrameConstructor::InsertionKind) src/layout/base/nsCSSFrameConstructor.cpp:6880:5
#3 mozilla::RestyleManager::ProcessRestyledFrames(nsStyleChangeList&) src/layout/base/RestyleManager.cpp:1448:27
#4 mozilla::RestyleManager::DoProcessPendingRestyles(mozilla::ServoTraversalFlags) src/layout/base/RestyleManager.cpp:3090:9
#5 mozilla::PresShell::DoFlushPendingNotifications(mozilla::ChangesToFlush) src/layout/base/PresShell.cpp:4127:39
#6 nsRefreshDriver::Tick(mozilla::layers::BaseTransactionId<mozilla::VsyncIdType>, mozilla::TimeStamp) src/layout/base/nsRefreshDriver.cpp:1879:18
#7 mozilla::RefreshDriverTimer::TickRefreshDrivers(mozilla::layers::BaseTransactionId<mozilla::VsyncIdType>, mozilla::TimeStamp, nsTArray<RefPtr<nsRefreshDriver> >&) src/layout/base/nsRefreshDriver.cpp:319:7
#8 mozilla::RefreshDriverTimer::Tick(mozilla::layers::BaseTransactionId<mozilla::VsyncIdType>, mozilla::TimeStamp) src/layout/base/nsRefreshDriver.cpp:336:5
#9 mozilla::VsyncRefreshDriverTimer::RefreshDriverVsyncObserver::TickRefreshDriver(mozilla::layers::BaseTransactionId<mozilla::VsyncIdType>, mozilla::TimeStamp) src/layout/base/nsRefreshDriver.cpp:692:16
#10 mozilla::VsyncRefreshDriverTimer::RefreshDriverVsyncObserver::NotifyVsync(mozilla::VsyncEvent const&) src/layout/base/nsRefreshDriver.cpp:592:9
#11 mozilla::layout::VsyncChild::RecvNotify(mozilla::VsyncEvent const&) src/layout/ipc/VsyncChild.cpp:65:16
#12 mozilla::layout::PVsyncChild::OnMessageReceived(IPC::Message const&) src/obj-firefox/ipc/ipdl/PVsyncChild.cpp:168:54
#13 mozilla::ipc::PBackgroundChild::OnMessageReceived(IPC::Message const&) src/obj-firefox/ipc/ipdl/PBackgroundChild.cpp:2808:28
#14 mozilla::ipc::MessageChannel::DispatchAsyncMessage(IPC::Message const&) src/ipc/glue/MessageChannel.cpp:2150:21
#15 mozilla::ipc::MessageChannel::DispatchMessage(IPC::Message&&) src/ipc/glue/MessageChannel.cpp:2077:9
#16 mozilla::ipc::MessageChannel::RunMessage(mozilla::ipc::MessageChannel::MessageTask&) src/ipc/glue/MessageChannel.cpp:1936:3
#17 mozilla::ipc::MessageChannel::MessageTask::Run() src/ipc/glue/MessageChannel.cpp:1967:13
#18 nsThread::ProcessNextEvent(bool, bool*) src/xpcom/threads/nsThread.cpp:1162:14
#19 NS_ProcessNextEvent(nsIThread*, bool) src/xpcom/threads/nsThreadUtils.cpp:474:10
#20 mozilla::ipc::MessagePump::Run(base::MessagePump::Delegate*) src/ipc/glue/MessagePump.cpp:88:21
#21 MessageLoop::RunInternal() src/ipc/chromium/src/base/message_loop.cc:315:10
#22 MessageLoop::Run() src/ipc/chromium/src/base/message_loop.cc:290:3
#23 nsBaseAppShell::Run() src/widget/nsBaseAppShell.cpp:137:27
#24 XRE_RunAppShell() src/toolkit/xre/nsEmbedFunctions.cpp:908:20
#25 mozilla::ipc::MessagePumpForChildProcess::Run(base::MessagePump::Delegate*) src/ipc/glue/MessagePump.cpp:238:9
#26 MessageLoop::RunInternal() src/ipc/chromium/src/base/message_loop.cc:315:10
#27 MessageLoop::Run() src/ipc/chromium/src/base/message_loop.cc:290:3
#28 XRE_InitChildProcess(int, char**, XREChildData const*) src/toolkit/xre/nsEmbedFunctions.cpp:746:34
#29 content_process_main(mozilla::Bootstrap*, int, char**) src/browser/app/../../ipc/contentproc/plugin-container.cpp:49:28
#30 main src/browser/app/nsBrowserApp.cpp:265:18

<button> has column-width: 0. It crashed because column-span is not implemented yet.

The test no longer crashes after fixing bug 1489295. Close as a duplicate.