Bug 431375

Application: plasmashell (5.20.5)

Qt Version: 5.15.2
Frameworks Version: 5.77.0
Operating System: Linux 5.4.0-60-generic x86_64
Windowing system: X11
Distribution: KDE neon User Edition 5.20

-- Information about the crash:
- What I was doing when the application crashed:

I wanted to change the desktop background so I right clicked on the desktop to bring up the context menu. As the context menu did not appear I continued to repeatedly right click on it until it went black (crashed?) and then reloaded the background picture. Afer that the context menu worked again as expected.

- Additional information: 

In the same session, a few hours before, I change the background from "Slideshow" to "Image".

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

[New LWP 4073]
[New LWP 4079]
[New LWP 4156]
[New LWP 4717]
[New LWP 4718]
[New LWP 4719]
[New LWP 4720]
[New LWP 4721]
[New LWP 4722]
[New LWP 4723]
[New LWP 4724]
[New LWP 4725]
[New LWP 4726]
[New LWP 4727]
[New LWP 4728]
[New LWP 4729]
[New LWP 4730]
[New LWP 4731]
[New LWP 4875]
[New LWP 4876]
[New LWP 4877]
[New LWP 4878]
[New LWP 4879]
[New LWP 12289]
[New LWP 12290]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
0x00007fd61f941aff in __GI___poll (fds=0x7ffd4eedc868, nfds=1, timeout=1000) at ../sysdeps/unix/sysv/linux/poll.c:29
[Current thread is 1 (Thread 0x7fd61bba32c0 (LWP 4065))]

Thread 26 (Thread 0x7fd5b0d56700 (LWP 12290)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x559d628afa64) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x559d628afa10, cond=0x559d628afa38) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x559d628afa38, mutex=0x559d628afa10) at pthread_cond_wait.c:638
#3  0x00007fd61fcd4d1b in QWaitConditionPrivate::wait (deadline=..., this=0x559d628afa10) at thread/qwaitcondition_unix.cpp:146
#4  QWaitCondition::wait (this=this@entry=0x559d62bbec58, mutex=mutex@entry=0x559d62bbec50, deadline=...) at thread/qwaitcondition_unix.cpp:225
#5  0x00007fd621a6e814 in QSGRenderThreadEventQueue::takeEvent (wait=true, this=0x559d62bbec48) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qdeadlinetimer.h:68
#6  QSGRenderThread::processEventsAndWaitForMore (this=this@entry=0x559d62bbebb0) at scenegraph/qsgthreadedrenderloop.cpp:936
#7  0x00007fd621a6ec89 in QSGRenderThread::run (this=0x559d62bbebb0) at scenegraph/qsgthreadedrenderloop.cpp:1053
#8  0x00007fd61fccebac in QThreadPrivate::start (arg=0x559d62bbebb0) at thread/qthread_unix.cpp:329
#9  0x00007fd61ed33609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#10 0x00007fd61f94e293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 25 (Thread 0x7fd5b1557700 (LWP 12289)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x559d62bf9df0) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x559d62bf9da0, cond=0x559d62bf9dc8) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x559d62bf9dc8, mutex=0x559d62bf9da0) at pthread_cond_wait.c:638
#3  0x00007fd60a4c261b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fd60a4c221b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fd61ed33609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fd61f94e293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 24 (Thread 0x7fd5b37fe700 (LWP 4879)):
#0  0x00007fd61e272c74 in g_main_context_check () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fd61e273152 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd61e2732e3 in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd61ff0efbb in QEventDispatcherGlib::processEvents (this=0x7fd5a0000b60, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007fd61feb31ab in QEventLoop::exec (this=this@entry=0x7fd5b37fdca0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:141
#5  0x00007fd61fccda12 in QThread::exec (this=this@entry=0x559d629b3030) at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#6  0x00007fd6219a938a in QQuickPixmapReader::run (this=0x559d629b3030) at util/qquickpixmapcache.cpp:1024
#7  0x00007fd61fccebac in QThreadPrivate::start (arg=0x559d629b3030) at thread/qthread_unix.cpp:329
#8  0x00007fd61ed33609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#9  0x00007fd61f94e293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 23 (Thread 0x7fd5b3fff700 (LWP 4878)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x559d62a866f4) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x559d62a866a0, cond=0x559d62a866c8) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x559d62a866c8, mutex=0x559d62a866a0) at pthread_cond_wait.c:638
#3  0x00007fd61fcd4d1b in QWaitConditionPrivate::wait (deadline=..., this=0x559d62a866a0) at thread/qwaitcondition_unix.cpp:146
#4  QWaitCondition::wait (this=this@entry=0x7fd6140037e8, mutex=mutex@entry=0x7fd6140037e0, deadline=...) at thread/qwaitcondition_unix.cpp:225
#5  0x00007fd621a6e814 in QSGRenderThreadEventQueue::takeEvent (wait=true, this=0x7fd6140037d8) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qdeadlinetimer.h:68
#6  QSGRenderThread::processEventsAndWaitForMore (this=this@entry=0x7fd614003740) at scenegraph/qsgthreadedrenderloop.cpp:936
#7  0x00007fd621a6ec89 in QSGRenderThread::run (this=0x7fd614003740) at scenegraph/qsgthreadedrenderloop.cpp:1053
#8  0x00007fd61fccebac in QThreadPrivate::start (arg=0x7fd614003740) at thread/qthread_unix.cpp:329
#9  0x00007fd61ed33609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#10 0x00007fd61f94e293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 22 (Thread 0x7fd5bcef8700 (LWP 4877)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x559d62acc1a4) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x559d62acc150, cond=0x559d62acc178) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x559d62acc178, mutex=0x559d62acc150) at pthread_cond_wait.c:638
#3  0x00007fd60a4c261b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fd60a4c221b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fd61ed33609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fd61f94e293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 21 (Thread 0x7fd5fcf5a700 (LWP 4876)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x559d62795350) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x559d62795300, cond=0x559d62795328) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x559d62795328, mutex=0x559d62795300) at pthread_cond_wait.c:638
#3  0x00007fd61fcd4d1b in QWaitConditionPrivate::wait (deadline=..., this=0x559d62795300) at thread/qwaitcondition_unix.cpp:146
#4  QWaitCondition::wait (this=this@entry=0x7fd60c014798, mutex=mutex@entry=0x7fd60c014790, deadline=...) at thread/qwaitcondition_unix.cpp:225
#5  0x00007fd621a6e814 in QSGRenderThreadEventQueue::takeEvent (wait=true, this=0x7fd60c014788) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qdeadlinetimer.h:68
#6  QSGRenderThread::processEventsAndWaitForMore (this=this@entry=0x7fd60c0146f0) at scenegraph/qsgthreadedrenderloop.cpp:936
#7  0x00007fd621a6ec89 in QSGRenderThread::run (this=0x7fd60c0146f0) at scenegraph/qsgthreadedrenderloop.cpp:1053
#8  0x00007fd61fccebac in QThreadPrivate::start (arg=0x7fd60c0146f0) at thread/qthread_unix.cpp:329
#9  0x00007fd61ed33609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#10 0x00007fd61f94e293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 20 (Thread 0x7fd5be118700 (LWP 4875)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x559d629fa924) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x559d629fa8d0, cond=0x559d629fa8f8) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x559d629fa8f8, mutex=0x559d629fa8d0) at pthread_cond_wait.c:638
#3  0x00007fd60a4c261b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fd60a4c221b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fd61ed33609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fd61f94e293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 19 (Thread 0x7fd5fdb5b700 (LWP 4731)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x559d62418408) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x559d624183b8, cond=0x559d624183e0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x559d624183e0, mutex=0x559d624183b8) at pthread_cond_wait.c:638
#3  0x00007fd60a4c261b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fd60a4c221b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fd61ed33609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fd61f94e293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 18 (Thread 0x7fd5fe35c700 (LWP 4730)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x559d62418408) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x559d624183b8, cond=0x559d624183e0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x559d624183e0, mutex=0x559d624183b8) at pthread_cond_wait.c:638
#3  0x00007fd60a4c261b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fd60a4c221b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fd61ed33609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fd61f94e293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 17 (Thread 0x7fd5feb5d700 (LWP 4729)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x559d62418408) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x559d624183b8, cond=0x559d624183e0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x559d624183e0, mutex=0x559d624183b8) at pthread_cond_wait.c:638
#3  0x00007fd60a4c261b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fd60a4c221b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fd61ed33609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fd61f94e293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 16 (Thread 0x7fd5ff35e700 (LWP 4728)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x559d62418408) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x559d624183b8, cond=0x559d624183e0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x559d624183e0, mutex=0x559d624183b8) at pthread_cond_wait.c:638
#3  0x00007fd60a4c261b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fd60a4c221b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fd61ed33609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fd61f94e293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 15 (Thread 0x7fd5ffb5f700 (LWP 4727)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x559d62417d04) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x559d62417cb0, cond=0x559d62417cd8) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x559d62417cd8, mutex=0x559d62417cb0) at pthread_cond_wait.c:638
#3  0x00007fd60a4c261b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fd60a4c221b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fd61ed33609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fd61f94e293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7fd600360700 (LWP 4726)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x559d62417d00) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x559d62417cb0, cond=0x559d62417cd8) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x559d62417cd8, mutex=0x559d62417cb0) at pthread_cond_wait.c:638
#3  0x00007fd60a4c261b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fd60a4c221b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fd61ed33609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fd61f94e293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7fd600b61700 (LWP 4725)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x559d62417d04) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x559d62417cb0, cond=0x559d62417cd8) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x559d62417cd8, mutex=0x559d62417cb0) at pthread_cond_wait.c:638
#3  0x00007fd60a4c261b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fd60a4c221b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fd61ed33609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fd61f94e293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7fd601362700 (LWP 4724)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x559d62417d00) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x559d62417cb0, cond=0x559d62417cd8) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x559d62417cd8, mutex=0x559d62417cb0) at pthread_cond_wait.c:638
#3  0x00007fd60a4c261b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fd60a4c221b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fd61ed33609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fd61f94e293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7fd601b63700 (LWP 4723)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x559d62417d00) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x559d62417cb0, cond=0x559d62417cd8) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x559d62417cd8, mutex=0x559d62417cb0) at pthread_cond_wait.c:638
#3  0x00007fd60a4c261b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fd60a4c221b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fd61ed33609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fd61f94e293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7fd602364700 (LWP 4722)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x559d62417d04) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x559d62417cb0, cond=0x559d62417cd8) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x559d62417cd8, mutex=0x559d62417cb0) at pthread_cond_wait.c:638
#3  0x00007fd60a4c261b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fd60a4c221b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fd61ed33609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fd61f94e293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7fd602b65700 (LWP 4721)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x559d6236bbf8) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x559d6236bba8, cond=0x559d6236bbd0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x559d6236bbd0, mutex=0x559d6236bba8) at pthread_cond_wait.c:638
#3  0x00007fd60a4c261b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fd60a4c221b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fd61ed33609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fd61f94e293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7fd603366700 (LWP 4720)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x559d6236bbf8) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x559d6236bba8, cond=0x559d6236bbd0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x559d6236bbd0, mutex=0x559d6236bba8) at pthread_cond_wait.c:638
#3  0x00007fd60a4c261b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fd60a4c221b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fd61ed33609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fd61f94e293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7fd603b67700 (LWP 4719)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x559d6236bbf8) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x559d6236bba8, cond=0x559d6236bbd0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x559d6236bbd0, mutex=0x559d6236bba8) at pthread_cond_wait.c:638
#3  0x00007fd60a4c261b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fd60a4c221b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fd61ed33609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fd61f94e293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7fd604368700 (LWP 4718)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x559d6236bbfc) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x559d6236bba8, cond=0x559d6236bbd0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x559d6236bbd0, mutex=0x559d6236bba8) at pthread_cond_wait.c:638
#3  0x00007fd60a4c261b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fd60a4c221b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fd61ed33609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fd61f94e293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7fd604cf6700 (LWP 4717)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x559d62414188) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x559d62414138, cond=0x559d62414160) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x559d62414160, mutex=0x559d62414138) at pthread_cond_wait.c:638
#3  0x00007fd60a4c261b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007fd60a4c221b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007fd61ed33609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fd61f94e293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7fd618eac700 (LWP 4156)):
#0  0x00007fd61ff0f6d3 in postEventSourcePrepare (timeout=<synthetic pointer>, s=0x7fd6100047b0) at /usr/include/c++/9/bits/atomic_base.h:413
#1  postEventSourceCheck (source=0x7fd6100047b0) at kernel/qeventdispatcher_glib.cpp:270
#2  0x00007fd61e272be1 in g_main_context_check () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd61e273152 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fd61e2732e3 in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fd61ff0efbb in QEventDispatcherGlib::processEvents (this=0x7fd610000b60, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#6  0x00007fd61feb31ab in QEventLoop::exec (this=this@entry=0x7fd618eabcc0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:141
#7  0x00007fd61fccda12 in QThread::exec (this=this@entry=0x559d6223d970) at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#8  0x00007fd6215a4fa9 in QQmlThreadPrivate::run (this=0x559d6223d970) at qml/ftw/qqmlthread.cpp:155
#9  0x00007fd61fccebac in QThreadPrivate::start (arg=0x559d6223d970) at thread/qthread_unix.cpp:329
#10 0x00007fd61ed33609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#11 0x00007fd61f94e293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7fd61a13d700 (LWP 4079)):
#0  __GI___libc_read (nbytes=16, buf=0x7fd61a13caa0, fd=7) at ../sysdeps/unix/sysv/linux/read.c:26
#1  __GI___libc_read (fd=7, buf=0x7fd61a13caa0, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:24
#2  0x00007fd61e2bb89f in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd61e272cfe in g_main_context_check () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fd61e273152 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fd61e2732e3 in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fd61ff0efbb in QEventDispatcherGlib::processEvents (this=0x7fd60c000b60, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#7  0x00007fd61feb31ab in QEventLoop::exec (this=this@entry=0x7fd61a13ccb0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:141
#8  0x00007fd61fccda12 in QThread::exec (this=this@entry=0x7fd6208bad80 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#9  0x00007fd620836f4b in QDBusConnectionManager::run (this=0x7fd6208bad80 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:179
#10 0x00007fd61fccebac in QThreadPrivate::start (arg=0x7fd6208bad80 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:329
#11 0x00007fd61ed33609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#12 0x00007fd61f94e293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7fd61afa3700 (LWP 4073)):
#0  0x00007fd61f941aff in __GI___poll (fds=0x7fd61afa2be8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fd621f2cc1a in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fd621f2e90a in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fd61b4b2d58 in QXcbEventQueue::run (this=0x559d61e6bb20) at qxcbeventqueue.cpp:228
#4  0x00007fd61fccebac in QThreadPrivate::start (arg=0x559d61e6bb20) at thread/qthread_unix.cpp:329
#5  0x00007fd61ed33609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fd61f94e293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7fd61bba32c0 (LWP 4065)):
[KCrash Handler]
#4  0x00007fd620bbc19b in std::__atomic_base<int>::load (__m=std::memory_order_relaxed, this=<optimized out>) at /usr/include/c++/9/bits/atomic_base.h:413
#5  QAtomicOps<int>::loadRelaxed<int> (_q_value=...) at ../../include/QtCore/../../src/corelib/thread/qatomic_cxx11.h:239
#6  QBasicAtomicInteger<int>::loadRelaxed (this=<optimized out>) at ../../include/QtCore/../../src/corelib/thread/qbasicatomic.h:107
#7  QtPrivate::RefCount::isShared (this=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qrefcount.h:101
#8  QList<QWidget*>::append (this=0x7fd61ffa2a40 <CSWTCH.451>, t=@0x7ffd4eedd090: 0x559d62611c10) at ../../include/QtCore/../../src/corelib/tools/qlist.h:622
#9  0x00007fd620be86d8 in QWidget::insertAction (this=0x559d62611c10, before=<optimized out>, action=0x559d6250bf40) at kernel/qwidget.cpp:3129
#10 0x00007fd620be880e in QWidget::addActions (this=this@entry=0x559d62611c10, actions=...) at ../../include/QtCore/../../src/corelib/tools/qlist.h:570
#11 0x00007fd618ed143b in ContainmentInterface::addContainmentActions (event=<optimized out>, desktopMenu=0x559d62611c10, this=0x559d622efdc0) at ./src/scriptengines/qml/plasmoid/containmentinterface.cpp:1132
#12 ContainmentInterface::addContainmentActions (this=0x559d622efdc0, desktopMenu=0x559d62611c10, event=<optimized out>) at ./src/scriptengines/qml/plasmoid/containmentinterface.cpp:1095
#13 0x00007fd618ed1e6e in ContainmentInterface::mousePressEvent (this=0x559d622efdc0, event=0x7ffd4eeddd20) at ./src/scriptengines/qml/plasmoid/containmentinterface.cpp:951
#14 0x00007fd621aba5a8 in QQuickItem::event (this=this@entry=0x559d622efdc0, ev=ev@entry=0x7ffd4eeddd20) at items/qquickitem.cpp:8131
#15 0x00007fd618ec746e in AppletInterface::event (this=0x559d622efdc0, event=0x7ffd4eeddd20) at ./src/scriptengines/qml/plasmoid/appletinterface.cpp:850
#16 0x00007fd620baedc3 in QApplicationPrivate::notify_helper (this=this@entry=0x559d61e60270, receiver=receiver@entry=0x559d622efdc0, e=e@entry=0x7ffd4eeddd20) at kernel/qapplication.cpp:3632
#17 0x00007fd620bb7bb8 in QApplication::notify (this=0x7ffd4eede210, receiver=0x559d622efdc0, e=0x7ffd4eeddd20) at kernel/qapplication.cpp:3156
#18 0x00007fd61feb469a in QCoreApplication::notifyInternal2 (receiver=0x559d622efdc0, event=0x7ffd4eeddd20) at ../../include/QtCore/5.15.2/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:325
#19 0x00007fd621ad3130 in QQuickWindowPrivate::deliverMatchingPointsToItem (this=this@entry=0x559d622d72e0, item=0x559d622efdc0, pointerEvent=pointerEvent@entry=0x559d62585cb0, handlersOnly=handlersOnly@entry=false) at items/qquickwindow.cpp:2895
#20 0x00007fd621ad43f4 in QQuickWindowPrivate::deliverPressOrReleaseEvent (this=<optimized out>, event=<optimized out>, handlersOnly=false) at items/qquickwindow.cpp:2855
#21 0x00007fd621ad4cbd in QQuickWindowPrivate::deliverMouseEvent (this=this@entry=0x559d622d72e0, pointerEvent=0x559d62585cb0) at items/qquickwindow.cpp:2040
#22 0x00007fd621ad610f in QQuickWindowPrivate::deliverPointerEvent (this=this@entry=0x559d622d72e0, event=0x559d62585cb0) at items/qquickwindow.cpp:2612
#23 0x00007fd621ad7039 in QQuickWindowPrivate::handleMouseEvent (event=0x7ffd4eeddd20, this=0x559d622d72e0) at items/qquickwindow.cpp:2457
#24 QQuickWindowPrivate::handleMouseEvent (this=0x559d622d72e0, event=0x7ffd4eeddd20) at items/qquickwindow.cpp:2410
#25 0x00007fd6202a1e1d in QWindow::event (this=this@entry=0x559d62350780, ev=ev@entry=0x7ffd4eeddd20) at kernel/qwindow.cpp:2438
#26 0x00007fd621ad8aab in QQuickWindow::event (this=0x559d62350780, e=0x7ffd4eeddd20) at items/qquickwindow.cpp:1902
#27 0x00007fd620baedc3 in QApplicationPrivate::notify_helper (this=this@entry=0x559d61e60270, receiver=receiver@entry=0x559d62350780, e=e@entry=0x7ffd4eeddd20) at kernel/qapplication.cpp:3632
#28 0x00007fd620bb7bb8 in QApplication::notify (this=0x7ffd4eede210, receiver=0x559d62350780, e=0x7ffd4eeddd20) at kernel/qapplication.cpp:3156
#29 0x00007fd61feb469a in QCoreApplication::notifyInternal2 (receiver=0x559d62350780, event=0x7ffd4eeddd20) at ../../include/QtCore/5.15.2/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:325
#30 0x00007fd6202964e8 in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) () at kernel/qguiapplication.cpp:2282
#31 0x00007fd620297b55 in QGuiApplicationPrivate::processWindowSystemEvent (e=0x7fd6140097e0) at kernel/qguiapplication.cpp:2002
#32 0x00007fd62026f7ac in QWindowSystemInterface::sendWindowSystemEvents (flags=flags@entry=...) at kernel/qwindowsysteminterface.cpp:1169
#33 0x00007fd61b4b3d7e in xcbSourceDispatch (source=<optimized out>) at qxcbeventdispatcher.cpp:105
#34 0x00007fd61e272fbd in g_main_context_dispatch () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#35 0x00007fd61e273240 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#36 0x00007fd61e2732e3 in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#37 0x00007fd61ff0efa2 in QEventDispatcherGlib::processEvents (this=0x559d61f7f240, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#38 0x00007fd61feb31ab in QEventLoop::exec (this=this@entry=0x7ffd4eede0c0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:141
#39 0x00007fd61febb354 in QCoreApplication::exec () at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#40 0x0000559d60151d6c in main (argc=<optimized out>, argv=<optimized out>) at ./shell/main.cpp:252
[Inferior 1 (process 4065) detached]

Possible duplicates by query: bug 431334, bug 429420, bug 428082, bug 427021, bug 426209.

Reported using DrKonqi