https://bugs.kde.org/show_bug.cgi?id=448790
--- Comment #1 from Weng Xuetian <wen...@gmail.com> ---
Full stack strace from crashed kwin_wayland.
#0 0x00007f369801fd22 in raise () at /usr/lib/libc.so.6
#1 0x00007f369800990e in abort () at /usr/lib/libc.so.6
#2 0x00007f36987dbee4 in qt_assert(char const*, char const*, int) () at
/usr/lib/libQt5Core.so.5
#3 0x00007f36987dbf44 in qt_assert_x(char const*, char const*, char const*,
int) () at /usr/lib/libQt5Core.so.5
#4 0x00007f3691edf3d0 in
KWin::EglGbmBackend::beginFrame(KWin::AbstractOutput*) (this=0x55a25a5d59a0,
drmOutput=0x55a25a836ce0) at
/home/csslayer/Develop/kwin/src/backends/drm/egl_gbm_backend.cpp:524
#5 0x00007f3691ee12f8 in
KWin::EglGbmBackend::renderTestFrame(KWin::DrmAbstractOutput*)
(this=0x55a25a5d59a0, output=0x55a25a836ce0) at
/home/csslayer/Develop/kwin/src/backends/drm/egl_gbm_backend.cpp:770
#6 0x00007f3691ed4693 in KWin::DrmPipeline::checkTestBuffer()
(this=0x55a25a6891b0) at
/home/csslayer/Develop/kwin/src/backends/drm/drm_pipeline.cpp:323
#7 0x00007f3691ed2dea in
KWin::DrmPipeline::commitPipelinesAtomic(QVector<KWin::DrmPipeline*> const&,
KWin::DrmPipeline::CommitMode, QVector<KWin::DrmObject*> const&)
(pipelines=..., mode=KWin::DrmPipeline::CommitMode::Test,
unusedObjects=...) at
/home/csslayer/Develop/kwin/src/backends/drm/drm_pipeline.cpp:131
#8 0x00007f3691ed2ae9 in
KWin::DrmPipeline::commitPipelines(QVector<KWin::DrmPipeline*> const&,
KWin::DrmPipeline::CommitMode, QVector<KWin::DrmObject*> const&)
(pipelines=..., mode=KWin::DrmPipeline::CommitMode::Test,
unusedObjects=...) at
/home/csslayer/Develop/kwin/src/backends/drm/drm_pipeline.cpp:103
#9 0x00007f3691ec1253 in KWin::DrmGpu::testPipelines() (this=0x55a25a532cd0)
at /home/csslayer/Develop/kwin/src/backends/drm/drm_gpu.cpp:427
#10 0x00007f3691ec098a in
KWin::DrmGpu::checkCrtcAssignment(QVector<KWin::DrmConnector*>,
QVector<KWin::DrmCrtc*>) (this=0x55a25a532cd0, connectors=..., crtcs=...)
at /home/csslayer/Develop/kwin/src/backends/drm/drm_gpu.cpp:338
#11 0x00007f3691ec0c59 in
KWin::DrmGpu::checkCrtcAssignment(QVector<KWin::DrmConnector*>,
QVector<KWin::DrmCrtc*>) (this=0x55a25a532cd0, connectors=..., crtcs=...)
at /home/csslayer/Develop/kwin/src/backends/drm/drm_gpu.cpp:365
#12 0x00007f3691ec0daa in operator()() const (__closure=0x7ffdfc4e63d0) at
/home/csslayer/Develop/kwin/src/backends/drm/drm_gpu.cpp:398
#13 0x00007f3691ec1031 in
KWin::DrmGpu::testPendingConfiguration(KWin::DrmGpu::TestMode)
(this=0x55a25a532cd0, mode=KWin::DrmGpu::TestMode::TestWithCrtcReallocation)
at /home/csslayer/Develop/kwin/src/backends/drm/drm_gpu.cpp:403
#14 0x00007f3691e98113 in
KWin::DrmBackend::applyOutputChanges(KWin::WaylandOutputConfig const&)
(this=0x55a25a46b690, config=...) at
/home/csslayer/Develop/kwin/src/backends/drm/drm_backend.cpp:628
#15 0x00007f369abca146 in
KWin::Platform::requestOutputsChange(KWaylandServer::OutputConfigurationV2Interface*)
(this=0x55a25a46b690, config=0x55a25b3c42e0) at
/home/csslayer/Develop/kwin/src/platform.cpp:133
#16 0x00007f369acb2c16 in
operator()(KWaylandServer::OutputConfigurationV2Interface*) const
(__closure=0x55a25a4680e0, config=0x55a25b3c42e0) at
/home/csslayer/Develop/kwin/src/wayland_server.cpp:501
#17 0x00007f369acb81e6 in QtPrivate::FunctorCall<QtPrivate::IndexesList<0>,
QtPrivate::List<KWaylandServer::OutputConfigurationV2Interface*>, void,
KWin::WaylandServer::init(KWin::WaylandServer::InitializationFlags)::<lambda(KWaylandServer::OutputConfigurationV2Interface*)>
>::call(struct {...} &, void **) (f=..., arg=0x7ffdfc4e67b0) at
/usr/include/qt/QtCore/qobjectdefs_impl.h:146
#18 0x00007f369acb7c44 in
QtPrivate::Functor<KWin::WaylandServer::init(KWin::WaylandServer::InitializationFlags)::<lambda(KWaylandServer::OutputConfigurationV2Interface*)>,
1>::call<QtPrivate::List<KWaylandServer::OutputConfigurationV2Interface*>,
void>(struct {...} &, void *, void **) (f=..., arg=0x7ffdfc4e67b0) at
/usr/include/qt/QtCore/qobjectdefs_impl.h:256
#19 0x00007f369acb710d in
QtPrivate::QFunctorSlotObject<KWin::WaylandServer::init(KWin::WaylandServer::InitializationFlags)::<lambda(KWaylandServer::OutputConfigurationV2Interface*)>,
1, QtPrivate::List<KWaylandServer::OutputConfigurationV2Interface*>,
void>::impl(int, QtPrivate::QSlotObjectBase *, QObject *, void **, bool *)
(which=1, this_=0x55a25a4680d0, r=0x55a25a3dfae0, a=0x7ffdfc4e67b0, ret=0x0)
at /usr/include/qt/QtCore/qobjectdefs_impl.h:443
#20 0x00007f36989f85d3 in () at /usr/lib/libQt5Core.so.5
#21 0x00007f369a71d2e4 in
KWaylandServer::OutputManagementV2Interface::configurationChangeRequested(KWaylandServer::OutputConfigurationV2Interface*)
() at /usr/lib/libKWaylandServer.so.5
#22 0x00007f369670fd4a in () at /usr/lib/libffi.so.8
#23 0x00007f369670f267 in () at /usr/lib/libffi.so.8
#24 0x00007f369791f323 in () at /usr/lib/libwayland-server.so.0
#25 0x00007f369791a5cc in () at /usr/lib/libwayland-server.so.0
#26 0x00007f369791d1ca in wl_event_loop_dispatch () at
/usr/lib/libwayland-server.so.0
#27 0x00007f369a735b7b in KWaylandServer::Display::dispatchEvents() () at
/usr/lib/libKWaylandServer.so.5
#28 0x00007f36989f85d3 in () at /usr/lib/libQt5Core.so.5
#29 0x00007f36989fa294 in QSocketNotifier::activated(QSocketDescriptor,
QSocketNotifier::Type, QSocketNotifier::QPrivateSignal) () at
/usr/lib/libQt5Core.so.5
#30 0x00007f36989fa3df in QSocketNotifier::event(QEvent*) () at
/usr/lib/libQt5Core.so.5
#31 0x00007f36994811a6 in QApplicationPrivate::notify_helper(QObject*, QEvent*)
() at /usr/lib/libQt5Widgets.so.5
#32 0x00007f36989c79ba in QCoreApplication::notifyInternal2(QObject*, QEvent*)
() at /usr/lib/libQt5Core.so.5
#33 0x00007f3698a11924 in
QEventDispatcherUNIXPrivate::activateSocketNotifiers() () at
/usr/lib/libQt5Core.so.5
#34 0x00007f3698a12895 in
QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/libQt5Core.so.5
#35 0x000055a259c5feb2 in
QUnixEventDispatcherQPA::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
()
#36 0x00007f36989bfbab in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/libQt5Core.so.5
--Type <RET> for more, q to quit, c to continue without paging--
#37 0x00007f36989cb3e7 in QCoreApplication::exec() () at
/usr/lib/libQt5Core.so.5
#38 0x000055a259ae9808 in main(int, char**) (argc=14, argv=0x7ffdfc4e75f8) at
/home/csslayer/Develop/kwin/src/main_wayland.cpp:727
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