Bug 413082

Application: plasmashell (5.17.0)

Qt Version: 5.13.1
Frameworks Version: 5.63.0
Operating System: Linux 5.0.0-29-generic x86_64
Distribution: KDE neon User Edition 5.17

-- Information about the crash:
- What I was doing when the application crashed:
I turned my laptop on, got to the SDDM screen and input my password
- Unusual behavior I noticed:
As soon as the password was input the mouse pointer appeared on a black screen and the system didn't load the desktop at all. I had to Ctrl+Alt+Del to get the logout/reboot screen and turn the computer off to try again.

-- 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 0x7fdb3b5f6800 (LWP 1848))]

Thread 6 (Thread 0x7fdb07fff700 (LWP 1974)):
#0  0x00007fdb3235d9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5638e008e9a0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x5638e008e950, cond=0x5638e008e978) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x5638e008e978, mutex=0x5638e008e950) at pthread_cond_wait.c:655
#3  0x00007fdb3542cb0b in QWaitConditionPrivate::wait (deadline=..., this=0x5638e008e950) at thread/qwaitcondition_unix.cpp:146
#4  QWaitCondition::wait (this=<optimized out>, mutex=0x5638e029e560, deadline=...) at thread/qwaitcondition_unix.cpp:225
#5  0x00007fdb3542ce19 in QWaitCondition::wait (this=0x5638e029e568, mutex=0x5638e029e560, time=<optimized out>) at thread/qwaitcondition_unix.cpp:208
#6  0x00007fdb3944bec8 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007fdb3944c2fa in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#8  0x00007fdb35425b72 in QThreadPrivate::start (arg=0x5638e029e4e0) at thread/qthread_unix.cpp:360
#9  0x00007fdb323576db in start_thread (arg=0x7fdb07fff700) at pthread_create.c:463
#10 0x00007fdb34d2288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7fdb0ffff700 (LWP 1928)):
#0  0x00007fdb3235d9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5638dfc734d8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x5638dfc73488, cond=0x5638dfc734b0) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x5638dfc734b0, mutex=0x5638dfc73488) at pthread_cond_wait.c:655
#3  0x00007fdb1562d2cb in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#4  0x00007fdb1562cff7 in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#5  0x00007fdb323576db in start_thread (arg=0x7fdb0ffff700) at pthread_create.c:463
#6  0x00007fdb34d2288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7fdb1db68700 (LWP 1923)):
#0  0x00007fdb2ec94664 in g_mutex_unlock () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fdb2ec4e5be in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fdb2ec4e6dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fdb356689db in QEventDispatcherGlib::processEvents (this=0x7fdb10000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007fdb35608eaa in QEventLoop::exec (this=this@entry=0x7fdb1db67d80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#5  0x00007fdb354243ca in QThread::exec (this=<optimized out>) at thread/qthread.cpp:531
#6  0x00007fdb38ef2cb5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fdb35425b72 in QThreadPrivate::start (arg=0x5638dfdbf430) at thread/qthread_unix.cpp:360
#8  0x00007fdb323576db in start_thread (arg=0x7fdb1db68700) at pthread_create.c:463
#9  0x00007fdb34d2288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7fdb1fbf0700 (LWP 1877)):
#0  0x00007fdb34d15bf9 in __GI___poll (fds=0x7fdb18004db0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fdb2ec4e5c9 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fdb2ec4e6dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fdb356689db in QEventDispatcherGlib::processEvents (this=0x7fdb18000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007fdb35608eaa in QEventLoop::exec (this=this@entry=0x7fdb1fbefd70, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#5  0x00007fdb354243ca in QThread::exec (this=<optimized out>) at thread/qthread.cpp:531
#6  0x00007fdb3671c0e5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007fdb35425b72 in QThreadPrivate::start (arg=0x7fdb36993d80) at thread/qthread_unix.cpp:360
#8  0x00007fdb323576db in start_thread (arg=0x7fdb1fbf0700) at pthread_create.c:463
#9  0x00007fdb34d2288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7fdb25f06700 (LWP 1861)):
#0  0x00007fdb34d15bf9 in __GI___poll (fds=0x7fdb25f05ca8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fdb3a022747 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fdb3a02436a in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fdb288d7f00 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007fdb35425b72 in QThreadPrivate::start (arg=0x5638dfb77460) at thread/qthread_unix.cpp:360
#5  0x00007fdb323576db in start_thread (arg=0x7fdb25f06700) at pthread_create.c:463
#6  0x00007fdb34d2288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7fdb3b5f6800 (LWP 1848)):
[KCrash Handler]
#6  0x00007fdb355d1dc0 in QSortFilterProxyModelPrivate::build_source_to_proxy_mapping (proxy_to_source=..., source_to_proxy=..., this=0x5638e00209f0) at itemmodels/qsortfilterproxymodel.cpp:1184
#7  0x00007fdb355d6681 in QSortFilterProxyModelPrivate::sort (this=0x5638e00209f0) at itemmodels/qsortfilterproxymodel.cpp:615
#8  0x00007fdb0cb9c260 in Image::backgroundsFound (this=0x5638e00145e0) at ./wallpapers/image/image.cpp:641
#9  0x00007fdb3563b82f in QtPrivate::QSlotObjectBase::call (a=0x7ffc690d3be0, r=0x5638e00145e0, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:394
#10 QMetaObject::activate (sender=0x5638e0020700, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3789
#11 0x00007fdb3563c272 in QObject::event (this=0x5638e0020700, e=<optimized out>) at kernel/qobject.cpp:1260
#12 0x00007fdb36f71eac in QApplicationPrivate::notify_helper (this=this@entry=0x5638dfb58f80, receiver=receiver@entry=0x5638e0020700, e=e@entry=0x7fdaf800a5c0) at kernel/qapplication.cpp:3703
#13 0x00007fdb36f794b0 in QApplication::notify (this=0x7ffc690d4300, receiver=0x5638e0020700, e=0x7fdaf800a5c0) at kernel/qapplication.cpp:3449
#14 0x00007fdb3560ad48 in QCoreApplication::notifyInternal2 (receiver=0x5638e0020700, event=0x7fdaf800a5c0) at kernel/qcoreapplication.cpp:1095
#15 0x00007fdb3560af1e in QCoreApplication::sendEvent (receiver=<optimized out>, event=event@entry=0x7fdaf800a5c0) at kernel/qcoreapplication.cpp:1490
#16 0x00007fdb3560d667 in QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x5638dfb4eb40) at kernel/qcoreapplication.cpp:1840
#17 0x00007fdb3560dbf8 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1694
#18 0x00007fdb356693a3 in postEventSourceDispatch (s=0x5638dfbb9090) at kernel/qeventdispatcher_glib.cpp:277
#19 0x00007fdb2ec4e417 in g_main_context_dispatch () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007fdb2ec4e650 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007fdb2ec4e6dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007fdb356689bf in QEventDispatcherGlib::processEvents (this=0x5638dfbb8160, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#23 0x00007fdb35608eaa in QEventLoop::exec (this=this@entry=0x7ffc690d41b0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#24 0x00007fdb35612220 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1403
#25 0x00005638de69acef in main (argc=<optimized out>, argv=<optimized out>) at ./shell/main.cpp:219

Possible duplicates by query: bug 413018, bug 413016, bug 412977, bug 412462, bug 292489.

Reported using DrKonqi