Bug 449812

Application: plasmashell (5.24.0)

Qt Version: 5.15.3
Frameworks Version: 5.90.0
Operating System: Linux 5.16.7-051607-generic x86_64
Windowing System: Wayland
Distribution: KDE neon User - 5.24
DrKonqi: 5.24.0 [KCrashBackend]

-- Information about the crash:
- What I was doing when the application crashed:
I upgraded to the latest 5.24.0 release and walked away from my PC for 30-40 minutes - enough time for the power management to turn my monitor off.

I came back to my computer and started using it and noticed the time was wrong,. I right with date/time taskbar applet and chose adjust date/time - i noticed the time was correct in there.

I ran ntpdate-debian on the cli, the applet did not update its time shown.

Launched applications did not appear on the task bar (spotify in my case)

In a terminal I ran plasmashell --replace &

back to a working task bar / time applet

The reporter is unsure if this crash is reproducible.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault

[New LWP 3895]
[New LWP 44763]
[New LWP 44764]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
0x00007efcd45cfaff in __GI___poll (fds=0x7fff4f618af8, nfds=1, timeout=1000) at ../sysdeps/unix/sysv/linux/poll.c:29
__preamble__
[Current thread is 1 (Thread 0x7efcd07244c0 (LWP 3879))]

Thread 4 (Thread 0x7efc4d96b700 (LWP 44764)):
#0  0x00007efcd45cfaff in __GI___poll (fds=0x56024055b820, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007efcd2e6b36e in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007efcd2e6b6f3 in g_main_loop_run () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007efc58128f8a in  () at /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007efcd2e94ad1 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007efcd4440609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007efcd45dc293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7efc58ace700 (LWP 44763)):
#0  __GI___libc_read (nbytes=16, buf=0x7efc58acdb20, fd=32) at ../sysdeps/unix/sysv/linux/read.c:26
#1  __GI___libc_read (fd=32, buf=0x7efc58acdb20, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:24
#2  0x00007efcd2eb3b2f in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007efcd2e6aebe in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007efcd2e6b312 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007efcd2e6b4a3 in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007efcd2e6b4f1 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007efcd2e94ad1 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#8  0x00007efcd4440609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#9  0x00007efcd45dc293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7efccebce700 (LWP 3895)):
#0  0x00007efcd45cfaff in __GI___poll (fds=0x7efcb8004a60, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007efcd2e6b36e in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007efcd2e6b4a3 in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007efcd4b9da0b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7efcb8000b60, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007efcd4b41c9b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7efccebcdbb0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:141
#5  0x00007efcd495b362 in QThread::exec() (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#6  0x00007efcd54d2f4b in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007efcd495c543 in QThreadPrivate::start(void*) (arg=0x7efcd5556d80) at thread/qthread_unix.cpp:331
#8  0x00007efcd4440609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#9  0x00007efcd45dc293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7efcd07244c0 (LWP 3879)):
[KCrash Handler]
#4  0x00007efcd6d73fe1 in wl_map_insert_at (map=<optimized out>, flags=flags@entry=1, i=335, data=data@entry=0x0) at ../src/wayland-util.c:247
#5  0x00007efcd6d6fe85 in proxy_destroy (proxy=0x56023f35d750) at ../src/wayland-client.c:503
#6  wl_proxy_destroy (proxy=0x56023f35d750) at ../src/wayland-client.c:534
#7  0x00007efcd6e33e75 in QScopedPointerDeleter<KWayland::Client::Buffer::Private>::cleanup(KWayland::Client::Buffer::Private*) (pointer=0x56023dd10ed0) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qscopedpointer.h:52
#8  QScopedPointer<KWayland::Client::Buffer::Private, QScopedPointerDeleter<KWayland::Client::Buffer::Private> >::~QScopedPointer() (this=<optimized out>, __in_chrg=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qscopedpointer.h:107
#9  KWayland::Client::Buffer::~Buffer() (this=<optimized out>, __in_chrg=<optimized out>) at ./src/client/buffer.h:30
#10 0x00007efcd6e69cf6 in QtSharedPointer::CustomDeleter<KWayland::Client::Buffer, QtSharedPointer::NormalDeleter>::execute() (this=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qsharedpointer_impl.h:187
#11 QtSharedPointer::ExternalRefCountWithCustomDeleter<KWayland::Client::Buffer, QtSharedPointer::NormalDeleter>::deleter(QtSharedPointer::ExternalRefCountData*) (self=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qsharedpointer_impl.h:205
#12 0x00007efcd6e686a5 in QtSharedPointer::ExternalRefCountData::destroy() (this=0x56023d9ec100) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qsharedpointer_impl.h:149
#13 QSharedPointer<KWayland::Client::Buffer>::deref(QtSharedPointer::ExternalRefCountData*) (dd=0x56023d9ec100) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qsharedpointer_impl.h:458
#14 QSharedPointer<KWayland::Client::Buffer>::deref(QtSharedPointer::ExternalRefCountData*) (dd=0x56023d9ec100) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qsharedpointer_impl.h:454
#15 QSharedPointer<KWayland::Client::Buffer>::deref() (this=0x56023c580650) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qsharedpointer_impl.h:453
#16 QSharedPointer<KWayland::Client::Buffer>::~QSharedPointer() (this=0x56023c580650, __in_chrg=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qsharedpointer_impl.h:310
#17 QList<QSharedPointer<KWayland::Client::Buffer> >::node_destruct(QList<QSharedPointer<KWayland::Client::Buffer> >::Node*, QList<QSharedPointer<KWayland::Client::Buffer> >::Node*) (this=<optimized out>, to=0x56023aad4128, from=0x56023aad4128) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qlist.h:524
#18 QList<QSharedPointer<KWayland::Client::Buffer> >::dealloc(QListData::Data*) (data=0x56023aad4110, this=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qlist.h:921
#19 0x00007efcd6e69d79 in QList<QSharedPointer<KWayland::Client::Buffer> >::operator=(QList<QSharedPointer<KWayland::Client::Buffer> >&&) (other=..., this=<optimized out>) at /usr/include/c++/9/bits/move.h:182
#20 QList<QSharedPointer<KWayland::Client::Buffer> >::clear() (this=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qlist.h:930
#21 0x00007efcd6e68f1e in KWayland::Client::ShmPool::release() (this=this@entry=0x56023ba516f0) at ./src/client/shm_pool.cpp:65
#22 0x00007efcd6e68fef in KWayland::Client::ShmPool::~ShmPool() (this=0x56023ba516f0, __in_chrg=<optimized out>) at ./src/client/shm_pool.cpp:60
#23 0x00007efcd6e690ad in KWayland::Client::ShmPool::~ShmPool() (this=0x56023ba516f0, __in_chrg=<optimized out>) at ./src/client/shm_pool.cpp:58
#24 0x00007efccd902721 in QScopedPointerDeleter<KWayland::Client::ShmPool>::cleanup(KWayland::Client::ShmPool*) (pointer=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qscopedpointer.h:52
#25 QScopedPointer<KWayland::Client::ShmPool, QScopedPointerDeleter<KWayland::Client::ShmPool> >::~QScopedPointer() (this=0x56023c0e63f0, __in_chrg=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qscopedpointer.h:107
#26 WindowShadowTile::~WindowShadowTile() (this=0x56023c0e63b0, __in_chrg=<optimized out>) at ./src/windowsystem/windowshadow.cpp:18
#27 0x00007efccd90275d in WindowShadowTile::~WindowShadowTile() (this=0x56023c0e63b0, __in_chrg=<optimized out>) at ./src/windowsystem/windowshadow.cpp:18
#28 0x00007efcd5dc2d24 in QtSharedPointer::ExternalRefCountData::destroy() (this=0x56023c62f300) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qsharedpointer_impl.h:149
#29 QSharedPointer<KWindowShadowTile>::deref(QtSharedPointer::ExternalRefCountData*) (dd=0x56023c62f300) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qsharedpointer_impl.h:458
#30 QSharedPointer<KWindowShadowTile>::deref(QtSharedPointer::ExternalRefCountData*) (dd=0x56023c62f300) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qsharedpointer_impl.h:454
#31 QSharedPointer<KWindowShadowTile>::deref() (this=0x56023ba6dd28) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qsharedpointer_impl.h:453
#32 QSharedPointer<KWindowShadowTile>::~QSharedPointer() (this=0x56023ba6dd28, __in_chrg=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qsharedpointer_impl.h:310
#33 KWindowShadowPrivate::~KWindowShadowPrivate() (this=0x56023ba6dca0, __in_chrg=<optimized out>) at ./src/kwindowshadow.cpp:279
#34 0x00007efccd9031ff in non-virtual thunk to WindowShadow::~WindowShadow() () at /usr/include/c++/9/bits/atomic_base.h:413
#35 0x00007efcd5dc2caa in QScopedPointerDeleter<KWindowShadowPrivate>::cleanup(KWindowShadowPrivate*) (pointer=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qscopedpointer.h:52
#36 QScopedPointer<KWindowShadowPrivate, QScopedPointerDeleter<KWindowShadowPrivate> >::~QScopedPointer() (this=0x56023a4aa470, __in_chrg=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qscopedpointer.h:107
#37 KWindowShadow::~KWindowShadow() (this=0x56023a4aa460, __in_chrg=<optimized out>) at ./src/kwindowshadow.cpp:63
#38 0x00007efcd5dc2ccd in KWindowShadow::~KWindowShadow() (this=0x56023a4aa460, __in_chrg=<optimized out>) at ./src/kwindowshadow.cpp:63
#39 0x00007efcd4b6d7ae in QObjectPrivate::deleteChildren() (this=0x56023d08ae20) at kernel/qobject.cpp:2104
#40 0x00007efcd4b781e6 in QObject::~QObject() (this=<optimized out>, __in_chrg=<optimized out>) at kernel/qobject.cpp:1082
#41 0x00007efcd6f3f65d in  () at /usr/lib/x86_64-linux-gnu/libKF5PlasmaQuick.so.5
#42 0x00007efcd4503a27 in __run_exit_handlers (status=0, listp=0x7efcd46a5718 <__exit_funcs>, run_list_atexit=run_list_atexit@entry=true, run_dtors=run_dtors@entry=true) at exit.c:108
#43 0x00007efcd4503be0 in __GI_exit (status=<optimized out>) at exit.c:139
#44 0x00007efcd44e10ba in __libc_start_main (main=0x560239b38f30 <main(int, char**)>, argc=1, argv=0x7fff4f619b58, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff4f619b48) at ../csu/libc-start.c:342
#45 0x0000560239b39ebe in _start () at ./shell/main.cpp:199
[Inferior 1 (process 3879) detached]

Possible duplicates by query: bug 449307, bug 407992, bug 400346, bug 372789.

Reported using DrKonqi