Bug 464748

Summary: kwin_wayland crashed when pressing alt+tab
Product: [Plasma] kwin Reporter: Patrick Silva <bugseforuns>
Component: wayland-genericAssignee: KWin default assignee <kwin-bugs-null>
Status: RESOLVED FIXED    
Severity: crash CC: kde, nate
Priority: NOR    
Version First Reported In: 5.26.90   
Target Milestone: ---   
Platform: Arch Linux   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Patrick Silva 2023-01-24 16:54:19 UTC 
When I pressed alt+tab, kwin_wayland crashed and all running apps were aborted.

Operating System: Arch Linux 
KDE Plasma Version: 5.26.90
KDE Frameworks Version: 5.102.0
Qt Version: 5.15.8
Graphics Platform: Wayland


Thread 10 (Thread 0x7f0ebeffe6c0 (LWP 769)):
Breakpoint 1 at 0x7f0ee34afb4e: file malloc.c, line 3362.

Thread 9 (Thread 0x7f0ebf7ff6c0 (LWP 1286)):
Note: breakpoint 1 also set at pc 0x7f0ee34afb4e.
Breakpoint 2 at 0x7f0ee34afb4e: file malloc.c, line 3362.

Thread 8 (Thread 0x7f0ededff6c0 (LWP 758)):
Note: breakpoints 1 and 2 also set at pc 0x7f0ee34afb4e.
Breakpoint 3 at 0x7f0ee34afb4e: file malloc.c, line 3362.

Thread 7 (Thread 0x7f0ea71a76c0 (LWP 10210)):
Note: breakpoints 1, 2 and 3 also set at pc 0x7f0ee34afb4e.
Breakpoint 4 at 0x7f0ee34afb4e: file malloc.c, line 3362.
Thread 10 (Thread 0x7f0ebeffe6c0 (LWP 769)):
#0  0x00007f0ee351437f in __GI___poll (fds=0x7f0eac0029e0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f0ee216dbef in g_main_context_poll (priority=<optimized out>, n_fds=1, fds=0x7f0eac0029e0, timeout=<optimized out>, context=0x7f0eac000c30) at ../glib/glib/gmain.c:4553
#2  g_main_context_iterate.constprop.0 (context=0x7f0eac000c30, block=1, dispatch=1, self=<optimized out>) at ../glib/glib/gmain.c:4243
#3  0x00007f0ee2115132 in g_main_context_iteration (context=0x7f0eac000c30, may_block=1) at ../glib/glib/gmain.c:4313
#4  0x00007f0ee44d8b2c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f0eac000b70, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#5  0x00007f0ee44865ac in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f0ebeffdce0, flags=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:69
#6  0x00007f0ee42e725f in QThread::exec() (this=this@entry=0x56368fa50240) at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#7  0x00007f0ee52c00e0 in QQmlThreadPrivate::run() (this=0x56368fa50240) at /usr/src/debug/qt5-declarative/qtdeclarative/src/qml/qml/ftw/qqmlthread.cpp:155
#8  0x00007f0ee42e432a in QThreadPrivate::start(void*) (arg=0x56368fa50240) at thread/qthread_unix.cpp:330
#9  0x00007f0ee349f8fd in start_thread (arg=<optimized out>) at pthread_create.c:442
#10 0x00007f0ee3521d20 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 9 (Thread 0x7f0ebf7ff6c0 (LWP 1286)):
#0  0x00007f0ee351437f in __GI___poll (fds=0x7f0eb4004440, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f0ee216dbef in g_main_context_poll (priority=<optimized out>, n_fds=1, fds=0x7f0eb4004440, timeout=<optimized out>, context=0x7f0eb401d550) at ../glib/glib/gmain.c:4553
#2  g_main_context_iterate.constprop.0 (context=0x7f0eb401d550, block=1, dispatch=1, self=<optimized out>) at ../glib/glib/gmain.c:4243
#3  0x00007f0ee2115132 in g_main_context_iteration (context=0x7f0eb401d550, may_block=1) at ../glib/glib/gmain.c:4313
#4  0x00007f0ee44d8b2c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f0eb4004960, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#5  0x00007f0ee44865ac in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f0ebf7fece0, flags=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:69
#6  0x00007f0ee42e725f in QThread::exec() (this=this@entry=0x563690bdd890) at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#7  0x00007f0ee52c00e0 in QQmlThreadPrivate::run() (this=0x563690bdd890) at /usr/src/debug/qt5-declarative/qtdeclarative/src/qml/qml/ftw/qqmlthread.cpp:155
#8  0x00007f0ee42e432a in QThreadPrivate::start(void*) (arg=0x563690bdd890) at thread/qthread_unix.cpp:330
#9  0x00007f0ee349f8fd in start_thread (arg=<optimized out>) at pthread_create.c:442
#10 0x00007f0ee3521d20 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 8 (Thread 0x7f0ededff6c0 (LWP 758)):
#0  0x00007f0ee351437f in __GI___poll (fds=0x7f0ed80053e0, nfds=3, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f0ee216dbef in g_main_context_poll (priority=<optimized out>, n_fds=3, fds=0x7f0ed80053e0, timeout=<optimized out>, context=0x7f0ed8001cf0) at ../glib/glib/gmain.c:4553
#2  g_main_context_iterate.constprop.0 (context=0x7f0ed8001cf0, block=1, dispatch=1, self=<optimized out>) at ../glib/glib/gmain.c:4243
#3  0x00007f0ee2115132 in g_main_context_iteration (context=0x7f0ed8001cf0, may_block=1) at ../glib/glib/gmain.c:4313
#4  0x00007f0ee44d8b2c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f0ed8000b70, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#5  0x00007f0ee44865ac in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f0ededfecd0, flags=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:69
#6  0x00007f0ee42e725f in QThread::exec() (this=this@entry=0x7f0ee62b9560 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#7  0x00007f0ee625dcba in QDBusConnectionManager::run() (this=0x7f0ee62b9560 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at /usr/src/debug/qt5-base/qtbase/src/dbus/qdbusconnection.cpp:179
#8  0x00007f0ee42e432a in QThreadPrivate::start(void*) (arg=0x7f0ee62b9560 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:330
#9  0x00007f0ee349f8fd in start_thread (arg=<optimized out>) at pthread_create.c:442
#10 0x00007f0ee3521d20 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 7 (Thread 0x7f0ea71a76c0 (LWP 10210)):
#0  0x00007f0ee3521356 in epoll_wait (epfd=92, events=events@entry=0x7f0ea71a6970, maxevents=32, timeout=-1) at ../sysdeps/unix/sysv/linux/epoll_wait.c:30
#1  0x00007f0ea69848a9 in impl_pollfd_wait (object=<optimized out>, pfd=<optimized out>, ev=0x7f0ea71a6b40, n_ev=<optimized out>, timeout=<optimized out>) at ../pipewire/spa/plugins/support/system.c:157
#2  0x00007f0ea69759db in loop_iterate (object=0x56369140a618, timeout=-1) at ../pipewire/spa/plugins/support/loop.c:422
#3  0x00007f0ee4121df7 in do_loop (user_data=0x5636915a6fa0) at ../pipewire/src/pipewire/data-loop.c:81
#4  0x00007f0ee349f8fd in start_thread (arg=<optimized out>) at pthread_create.c:442
#5  0x00007f0ee3521d20 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 6 (Thread 0x7f0e8d7056c0 (LWP 4380)):
#0  __futex_abstimed_wait_common64 (private=0, cancel=true, abstime=0x0, op=393, expected=0, futex_word=0x56369129d770) at futex-internal.c:57
#1  __futex_abstimed_wait_common (futex_word=futex_word@entry=0x56369129d770, expected=expected@entry=0, clockid=clockid@entry=0, abstime=abstime@entry=0x0, private=private@entry=0, cancel=cancel@entry=true) at futex-internal.c:87
#2  0x00007f0ee349c51f in __GI___futex_abstimed_wait_cancelable64 (futex_word=futex_word@entry=0x56369129d770, expected=expected@entry=0, clockid=clockid@entry=0, abstime=abstime@entry=0x0, private=private@entry=0) at futex-internal.c:139
#3  0x00007f0ee349ecd0 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x56369129d720, cond=0x56369129d748) at pthread_cond_wait.c:503
#4  ___pthread_cond_wait (cond=0x56369129d748, mutex=0x56369129d720) at pthread_cond_wait.c:618
#5  0x00007f0ed650c50e in cnd_wait () at ../mesa-22.3.3/src/c11/impl/threads_posix.c:135
#6  0x00007f0ed64bc89c in util_queue_thread_func () at ../mesa-22.3.3/src/util/u_queue.c:290
#7  0x00007f0ed650c43c in impl_thrd_routine () at ../mesa-22.3.3/src/c11/impl/threads_posix.c:67
#8  0x00007f0ee349f8fd in start_thread (arg=<optimized out>) at pthread_create.c:442
#9  0x00007f0ee3521d20 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 5 (Thread 0x7f0ecd5fe6c0 (LWP 767)):
#0  __futex_abstimed_wait_common64 (private=0, cancel=true, abstime=0x0, op=393, expected=0, futex_word=0x7f0edc2b6580) at futex-internal.c:57
#1  __futex_abstimed_wait_common (futex_word=futex_word@entry=0x7f0edc2b6580, expected=expected@entry=0, clockid=clockid@entry=0, abstime=abstime@entry=0x0, private=private@entry=0, cancel=cancel@entry=true) at futex-internal.c:87
#2  0x00007f0ee349c51f in __GI___futex_abstimed_wait_cancelable64 (futex_word=futex_word@entry=0x7f0edc2b6580, expected=expected@entry=0, clockid=clockid@entry=0, abstime=abstime@entry=0x0, private=private@entry=0) at futex-internal.c:139
#3  0x00007f0ee349ecd0 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x7f0edc2b6530, cond=0x7f0edc2b6558) at pthread_cond_wait.c:503
#4  ___pthread_cond_wait (cond=0x7f0edc2b6558, mutex=0x7f0edc2b6530) at pthread_cond_wait.c:618
#5  0x00007f0ed650c50e in cnd_wait () at ../mesa-22.3.3/src/c11/impl/threads_posix.c:135
#6  0x00007f0ed64bc89c in util_queue_thread_func () at ../mesa-22.3.3/src/util/u_queue.c:290
#7  0x00007f0ed650c43c in impl_thrd_routine () at ../mesa-22.3.3/src/c11/impl/threads_posix.c:67
#8  0x00007f0ee349f8fd in start_thread (arg=<optimized out>) at pthread_create.c:442
#9  0x00007f0ee3521d20 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 4 (Thread 0x7f0ecddff6c0 (LWP 766)):
#0  __futex_abstimed_wait_common64 (private=0, cancel=true, abstime=0x0, op=393, expected=0, futex_word=0x7f0edc380580) at futex-internal.c:57
#1  __futex_abstimed_wait_common (futex_word=futex_word@entry=0x7f0edc380580, expected=expected@entry=0, clockid=clockid@entry=0, abstime=abstime@entry=0x0, private=private@entry=0, cancel=cancel@entry=true) at futex-internal.c:87
#2  0x00007f0ee349c51f in __GI___futex_abstimed_wait_cancelable64 (futex_word=futex_word@entry=0x7f0edc380580, expected=expected@entry=0, clockid=clockid@entry=0, abstime=abstime@entry=0x0, private=private@entry=0) at futex-internal.c:139
#3  0x00007f0ee349ecd0 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x7f0edc380530, cond=0x7f0edc380558) at pthread_cond_wait.c:503
#4  ___pthread_cond_wait (cond=0x7f0edc380558, mutex=0x7f0edc380530) at pthread_cond_wait.c:618
#5  0x00007f0ed650c50e in cnd_wait () at ../mesa-22.3.3/src/c11/impl/threads_posix.c:135
#6  0x00007f0ed64bc89c in util_queue_thread_func () at ../mesa-22.3.3/src/util/u_queue.c:290
#7  0x00007f0ed650c43c in impl_thrd_routine () at ../mesa-22.3.3/src/c11/impl/threads_posix.c:67
#8  0x00007f0ee349f8fd in start_thread (arg=<optimized out>) at pthread_create.c:442
#9  0x00007f0ee3521d20 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 3 (Thread 0x7f0edd3b66c0 (LWP 761)):
#0  __futex_abstimed_wait_common64 (private=0, cancel=true, abstime=0x0, op=393, expected=0, futex_word=0x56368f6e2328) at futex-internal.c:57
#1  __futex_abstimed_wait_common (futex_word=futex_word@entry=0x56368f6e2328, expected=expected@entry=0, clockid=clockid@entry=0, abstime=abstime@entry=0x0, private=private@entry=0, cancel=cancel@entry=true) at futex-internal.c:87
#2  0x00007f0ee349c51f in __GI___futex_abstimed_wait_cancelable64 (futex_word=futex_word@entry=0x56368f6e2328, expected=expected@entry=0, clockid=clockid@entry=0, abstime=abstime@entry=0x0, private=private@entry=0) at futex-internal.c:139
#3  0x00007f0ee349ecd0 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x56368f6e22d8, cond=0x56368f6e2300) at pthread_cond_wait.c:503
#4  ___pthread_cond_wait (cond=0x56368f6e2300, mutex=0x56368f6e22d8) at pthread_cond_wait.c:618
#5  0x00007f0ed650c50e in cnd_wait () at ../mesa-22.3.3/src/c11/impl/threads_posix.c:135
#6  0x00007f0ed64bc89c in util_queue_thread_func () at ../mesa-22.3.3/src/util/u_queue.c:290
#7  0x00007f0ed650c43c in impl_thrd_routine () at ../mesa-22.3.3/src/c11/impl/threads_posix.c:67
#8  0x00007f0ee349f8fd in start_thread (arg=<optimized out>) at pthread_create.c:442
#9  0x00007f0ee3521d20 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 2 (Thread 0x7f0edcbb56c0 (LWP 762)):
#0  0x00007f0ee351437f in __GI___poll (fds=0x7f0ec00029e0, nfds=2, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f0ee216dbef in g_main_context_poll (priority=<optimized out>, n_fds=2, fds=0x7f0ec00029e0, timeout=<optimized out>, context=0x7f0ec0000c30) at ../glib/glib/gmain.c:4553
#2  g_main_context_iterate.constprop.0 (context=0x7f0ec0000c30, block=1, dispatch=1, self=<optimized out>) at ../glib/glib/gmain.c:4243
#3  0x00007f0ee2115132 in g_main_context_iteration (context=0x7f0ec0000c30, may_block=1) at ../glib/glib/gmain.c:4313
#4  0x00007f0ee44d8b2c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f0ec0000b70, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#5  0x00007f0ee44865ac in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f0edcbb4d00, flags=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:69
#6  0x00007f0ee42e725f in QThread::exec() (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#7  0x00007f0ee42e432a in QThreadPrivate::start(void*) (arg=0x56368f6e9de8) at thread/qthread_unix.cpp:330
#8  0x00007f0ee349f8fd in start_thread (arg=<optimized out>) at pthread_create.c:442
#9  0x00007f0ee3521d20 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 1 (Thread 0x7f0edf0fd880 (LWP 733)):
#0  0x00007f0ee34afb4e in __GI___libc_free (mem=0x1000000000000000) at malloc.c:3362
#1  0x00007f0ee36a56aa in operator delete(void*) (ptr=<optimized out>) at /usr/src/debug/gcc/gcc/libstdc++-v3/libsupc++/del_op.cc:49
#2  0x00007f0ee36a56da in operator delete[](void*) (ptr=<optimized out>) at /usr/src/debug/gcc/gcc/libstdc++-v3/libsupc++/del_opv.cc:35
#3  0x00007f0ee44afcad in QObjectPrivate::Connection::~Connection() (this=0x5636915c4650, this=<optimized out>) at kernel/qobject.cpp:1134
#4  0x00007f0ee44afd31 in QObjectPrivate::Connection::deref() (this=0x5636915c4650) at kernel/qobject_p.h:189
#5  QObjectPrivate::ConnectionData::deleteOrphaned(QObjectPrivate::ConnectionOrSignalVector*) (o=0x5636915c4650) at kernel/qobject.cpp:457
#6  0x00007f0ee44b55d0 in QObjectPrivate::ConnectionData::~ConnectionData() (this=0x5636911c6fd0, this=<optimized out>) at kernel/qobject_p.h:274
#7  QObject::~QObject() (this=<optimized out>, this=<optimized out>) at kernel/qobject.cpp:1111
#8  0x00007f0ea94c004a in QQmlPrivate::QQmlElement<IconItem>::~QQmlElement() (this=0x563690ef4030, this=<optimized out>) at /usr/include/qt/QtQml/qqmlprivate.h:144
#9  QQmlPrivate::QQmlElement<IconItem>::~QQmlElement() (this=0x563690ef4030, this=<optimized out>) at /usr/include/qt/QtQml/qqmlprivate.h:144
#10 0x00007f0ee44b189a in QObject::event(QEvent*) (this=0x563690ef4030, e=0x5636915b8320) at kernel/qobject.cpp:1334
#11 0x00007f0ee3b78b5c in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=<optimized out>, receiver=0x563690ef4030, e=0x5636915b8320) at kernel/qapplication.cpp:3640
#12 0x00007f0ee448de08 in QCoreApplication::notifyInternal2(QObject*, QEvent*) (receiver=0x563690ef4030, event=0x5636915b8320) at kernel/qcoreapplication.cpp:1064
#13 0x00007f0ee448e913 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (receiver=0x0, event_type=0, data=0x56368f5dd220) at kernel/qcoreapplication.cpp:1821
#14 0x00007f0ee44d8437 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x56368f5e4210, flags=...) at kernel/qeventdispatcher_unix.cpp:468
#15 0x000056368ef60312 in QUnixEventDispatcherQPA::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
#16 0x00007f0ee44865ac in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7fff2c69c250, flags=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:69
#17 0x00007f0ee44910d9 in QCoreApplication::exec() () at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#18 0x00007f0ee4939fe2 in QGuiApplication::exec() () at kernel/qguiapplication.cpp:1870
#19 0x00007f0ee3b76f2a in QApplication::exec() () at kernel/qapplication.cpp:2832
#20 0x000056368ee7d242 in main(int, char**) (argc=<optimized out>, argv=<optimized out>) at /usr/src/debug/kwin/kwin-5.26.90/src/main_wayland.cpp:628
Comment 1 David Edmundson 2023-06-20 23:05:21 UTC 
We haven't had any dupes since and this was against a beta, should be safe to close