https://bugs.kde.org/show_bug.cgi?id=455060
Bug ID: 455060
Summary: Restarting kwin_x11 systemd service on Wayland causes
kwin_wayland to crash
Product: kwin
Version: git master
Platform: Other
OS: Linux
Status: REPORTED
Keywords: drkonqi, wayland
Severity: normal
Priority: NOR
Component: compositing
Assignee: kwin-bugs-n...@kde.org
Reporter: qydwhotm...@gmail.com
Target Milestone: ---
Flags: Wayland+
SUMMARY
If I restart plasma-kwin_x11.service on Wayland, the whole desktop becomes
unusable because kwin_wayland continues crashing.
STEPS TO REPRODUCE
1. Log in to a Wayland session
2. Run `systemctl --user restart plasma-kwin_x11`
3. Crash
OBSERVED RESULT
kwin_wayland continues crashing
EXPECTED RESULT
No crash, and nothing should happen
SOFTWARE/OS VERSIONS
Information for package kwin5:
------------------------------
Repository : @System
Name : kwin5
Version : 5.25.80git.20220607T115826~419c0b81-ku.147.1
Arch : x86_64
Vendor : obs://build.opensuse.org/KDE:Unstable
Installed Size : 16.8 MiB
Installed : Yes
Status : up-to-date
Source package : kwin5-5.25.80git.20220607T115826~419c0b81-ku.147.1.src
Upstream URL : http://www.kde.org
Summary : KDE Window Manager
Description :
KWin is the window manager of the K desktop environment.
ADDITIONAL INFORMATION
(gdb) bt
#0 KSelectionOwner::filterEvent(void*) (this=0x55beeb5fd770, ev_P=<optimized
out>) at
/usr/src/debug/kwindowsystem-5.95.0git.20220604T082407~faae3bc-ku.5.2.x86_64/src/platforms/xcb/kselectionowner.cpp:380
#1 0x00007fcde6e050ef in
QAbstractEventDispatcher::filterNativeEvent(QByteArray const&, void*, long*)
(this=<optimized out>, eventType=..., message=message@entry=0x55beeb4c2430,
result=result@entry=0x7ffc1e2e3098) at kernel/qabstracteventdispatcher.cpp:495
#2 0x000055bee874c520 in KWin::Xwl::Xwayland::dispatchEvents()
(this=0x55beea803d70) at
/usr/src/debug/kwin5-5.25.80git.20220607T115826~419c0b81-ku.147.1.x86_64/src/xwayland/xwayland.cpp:123
#3 0x00007fcde6e3e453 in QtPrivate::QSlotObjectBase::call(QObject*, void**)
(a=0x7ffc1e2e31e0, r=0x55beea803d70, this=0x55beea0c14f0) at
../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:398
#4 doActivate<false>(QObject*, int, void**) (sender=0x55beeb4c46a0,
signal_index=3, argv=0x7ffc1e2e31e0) at kernel/qobject.cpp:3886
#5 0x00007fcde6e377af in QMetaObject::activate(QObject*, QMetaObject const*,
int, void**) (sender=sender@entry=0x55beeb4c46a0, m=m@entry=0x7fcde70dd880,
local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffc1e2e31e0)
at kernel/qobject.cpp:3946
#6 0x00007fcde6e4183f in QSocketNotifier::activated(QSocketDescriptor,
QSocketNotifier::Type, QSocketNotifier::QPrivateSignal)
(this=this@entry=0x55beeb4c46a0, _t1=..., _t2=<optimized out>, _t3=...) at
.moc/moc_qsocketnotifier.cpp:178
#7 0x00007fcde6e4203b in QSocketNotifier::event(QEvent*) (this=0x55beeb4c46a0,
e=0x7ffc1e2e3300) at kernel/qsocketnotifier.cpp:302
#8 0x00007fcde631db0f in QApplicationPrivate::notify_helper(QObject*, QEvent*)
(this=<optimized out>, receiver=0x55beeb4c46a0, e=0x7ffc1e2e3300) at
kernel/qapplication.cpp:3632
#9 0x00007fcde6e07b5a in QCoreApplication::notifyInternal2(QObject*, QEvent*)
(receiver=0x55beeb4c46a0, event=0x7ffc1e2e3300) at
kernel/qcoreapplication.cpp:1064
#10 0x00007fcde6e5c67b in
QEventDispatcherUNIXPrivate::activateSocketNotifiers() (this=0x55beea09dd30) at
kernel/qeventdispatcher_unix.cpp:304
#11 0x00007fcde6e5cadb in
QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
(this=<optimized out>, flags=...) at kernel/qeventdispatcher_unix.cpp:511
#12 0x000055bee8807ecd in
QUnixEventDispatcherQPA::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
(this=<optimized out>, flags=...) at qunixeventdispatcher.cpp:63
#13 0x00007fcde6e0655b in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)
(this=this@entry=0x7ffc1e2e3490, flags=..., flags@entry=...) at
../../include/QtCore/../../src/corelib/global/qflags.h:69
#14 0x00007fcde6e0e820 in QCoreApplication::exec() () at
../../include/QtCore/../../src/corelib/global/qflags.h:121
#15 0x00007fcde725861c in QGuiApplication::exec() () at
kernel/qguiapplication.cpp:1867
#16 0x00007fcde631da85 in QApplication::exec() () at
kernel/qapplication.cpp:2824
#17 0x000055bee87348e0 in main(int, char**) (argc=<optimized out>,
argv=<optimized out>) at
/usr/src/debug/kwin5-5.25.80git.20220607T115826~419c0b81-ku.147.1.x86_64/src/main_wayland.cpp:643
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