Bug 413219

Application: plasmashell (5.17.0)

Qt Version: 5.13.1
Frameworks Version: 5.63.0
Operating System: Linux 5.0.0-31-generic x86_64
Distribution: KDE neon User Edition 5.17

-- Information about the crash:
- Unusual behavior I noticed:

Plasma falls at arbitrary points in time, regardless of the tasks I have launched. I noticed this behavior of the working environment after upgrading to version 5.17. On another computer of a similar configuration, but plasma 5.16.5 does not crash.

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f51805f9800 (LWP 1487))]

Thread 4 (Thread 0x7f5162da2700 (LWP 1576)):
#0  QMutex::unlock (this=this@entry=0x561e348e33a0) at thread/qmutex.cpp:335
#1  0x00007f517a66e8ed in QMutexLocker::unlock (this=<synthetic pointer>) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:219
#2  QMutexLocker::~QMutexLocker (this=<synthetic pointer>, __in_chrg=<optimized out>) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:213
#3  QThreadData::canWaitLocked (this=0x561e348e3370) at ../../include/QtCore/5.13.1/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:272
#4  postEventSourcePrepare (s=0x7f51580047a0, timeout=0x7f5162da1bb4) at kernel/qeventdispatcher_glib.cpp:260
#5  0x00007f5173c53b28 in g_main_context_prepare () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f5173c544fb in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f5173c546dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#8  0x00007f517a66e9db in QEventDispatcherGlib::processEvents (this=0x7f5158000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#9  0x00007f517a60eeaa in QEventLoop::exec (this=this@entry=0x7f5162da1d80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#10 0x00007f517a42a3ca in QThread::exec (this=<optimized out>) at thread/qthread.cpp:531
#11 0x00007f517def8cb5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#12 0x00007f517a42bb72 in QThreadPrivate::start (arg=0x561e349dace0) at thread/qthread_unix.cpp:360
#13 0x00007f517735d6db in start_thread (arg=0x7f5162da2700) at pthread_create.c:463
#14 0x00007f5179d2888f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f5168e67700 (LWP 1538)):
#0  0x00007f5173c9a664 in g_mutex_unlock () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f5173c53b18 in g_main_context_prepare () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f5173c544fb in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f5173c546dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f517a66e9db in QEventDispatcherGlib::processEvents (this=0x7f515c000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007f517a60eeaa in QEventLoop::exec (this=this@entry=0x7f5168e66d70, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#6  0x00007f517a42a3ca in QThread::exec (this=<optimized out>) at thread/qthread.cpp:531
#7  0x00007f517b7220e5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#8  0x00007f517a42bb72 in QThreadPrivate::start (arg=0x7f517b999d80) at thread/qthread_unix.cpp:360
#9  0x00007f517735d6db in start_thread (arg=0x7f5168e67700) at pthread_create.c:463
#10 0x00007f5179d2888f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f516b050700 (LWP 1494)):
#0  0x00007f5179d1bbf9 in __GI___poll (fds=0x7f516b04fca8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f517f028747 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f517f02a36a in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f516da21f00 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f517a42bb72 in QThreadPrivate::start (arg=0x561e347f43e0) at thread/qthread_unix.cpp:360
#5  0x00007f517735d6db in start_thread (arg=0x7f516b050700) at pthread_create.c:463
#6  0x00007f5179d2888f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f51805f9800 (LWP 1487)):
[KCrash Handler]
#6  0x00007f517a5d7dc0 in QSortFilterProxyModelPrivate::build_source_to_proxy_mapping (proxy_to_source=..., source_to_proxy=..., this=0x561e35113fa0) at itemmodels/qsortfilterproxymodel.cpp:1184
#7  0x00007f517a5dc681 in QSortFilterProxyModelPrivate::sort (this=0x561e35113fa0) at itemmodels/qsortfilterproxymodel.cpp:615
#8  0x00007f514c02a260 in Image::backgroundsFound (this=0x561e35120d00) at ./wallpapers/image/image.cpp:641
#9  0x00007f517a64182f in QtPrivate::QSlotObjectBase::call (a=0x7fffde111df0, r=0x561e35120d00, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:394
#10 QMetaObject::activate (sender=0x561e35113ce0, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3789
#11 0x00007f517a642272 in QObject::event (this=0x561e35113ce0, e=<optimized out>) at kernel/qobject.cpp:1260
#12 0x00007f517bf77eac in QApplicationPrivate::notify_helper (this=this@entry=0x561e347d0f80, receiver=receiver@entry=0x561e35113ce0, e=e@entry=0x7f514400d360) at kernel/qapplication.cpp:3703
#13 0x00007f517bf7f4b0 in QApplication::notify (this=0x7fffde112510, receiver=0x561e35113ce0, e=0x7f514400d360) at kernel/qapplication.cpp:3449
#14 0x00007f517a610d48 in QCoreApplication::notifyInternal2 (receiver=0x561e35113ce0, event=0x7f514400d360) at kernel/qcoreapplication.cpp:1095
#15 0x00007f517a610f1e in QCoreApplication::sendEvent (receiver=<optimized out>, event=event@entry=0x7f514400d360) at kernel/qcoreapplication.cpp:1490
#16 0x00007f517a613667 in QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x561e347c6b40) at kernel/qcoreapplication.cpp:1840
#17 0x00007f517a613bf8 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1694
#18 0x00007f517a66f3a3 in postEventSourceDispatch (s=0x561e34829d30) at kernel/qeventdispatcher_glib.cpp:277
#19 0x00007f5173c54417 in g_main_context_dispatch () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007f5173c54650 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007f5173c546dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007f517a66e9bf in QEventDispatcherGlib::processEvents (this=0x561e34830bf0, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#23 0x00007f517a60eeaa in QEventLoop::exec (this=this@entry=0x7fffde1123c0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#24 0x00007f517a618220 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1403
#25 0x0000561e32be7cef in main (argc=<optimized out>, argv=<optimized out>) at ./shell/main.cpp:219

The reporter indicates this bug may be a duplicate of or related to bug 413018.

Possible duplicates by query: bug 413166, bug 413159, bug 413141, bug 413140, bug 413139.

Reported using DrKonqi