Application: plasma-discover (5.11.95)

Qt Version: 5.9.1
Frameworks Version: 5.42.0
Operating System: Linux 4.13.0-30-generic x86_64
Distribution: Ubuntu 17.10

-- Information about the crash:
- What I was doing when the application crashed:
tried opening the software center to install updates. Opening failed. 

- Custom settings of the application:
glibc recently updated to glibc (2.26-0ubuntu2.1)

- Other observations:
noticed the lockscreen causes a segfault in libc6 2.26.so and fails to work.

The crash can be reproduced every time.

-- Backtrace:
Application: Discover (plasma-discover), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f97667c05c0 (LWP 1790))]

Thread 18 (Thread 0x7f96fd107700 (LWP 1815)):
#0  0x00007f975e6d1072 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55b85ed64a98) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f975e6d1072 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55b85ed64a48, cond=0x55b85ed64a70) at pthread_cond_wait.c:502
#2  0x00007f975e6d1072 in __pthread_cond_wait (cond=0x55b85ed64a70, mutex=0x55b85ed64a48) at pthread_cond_wait.c:655
#3  0x00007f9740b97d1b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f9740b97a38 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f975e6ca7fc in start_thread (arg=0x7f96fd107700) at pthread_create.c:465
#6  0x00007f9761eb7b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 17 (Thread 0x7f96fd908700 (LWP 1812)):
#0  0x00007f975e6d1072 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f96f0022070) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f975e6d1072 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f96f0022020, cond=0x7f96f0022048) at pthread_cond_wait.c:502
#2  0x00007f975e6d1072 in __pthread_cond_wait (cond=0x7f96f0022048, mutex=0x7f96f0022020) at pthread_cond_wait.c:655
#3  0x00007f97625b86cb in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f97625b0d6b in QSemaphore::acquire(int) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f97627c3bf8 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f975fd5f21b in  () at /usr/lib/x86_64-linux-gnu/libQt5Network.so.5
#7  0x00007f975fe0104d in  () at /usr/lib/x86_64-linux-gnu/libQt5Network.so.5
#8  0x00007f97627c38e5 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f975fd20581 in  () at /usr/lib/x86_64-linux-gnu/libQt5Network.so.5
#10 0x00007f975fd20d35 in  () at /usr/lib/x86_64-linux-gnu/libQt5Network.so.5
#11 0x00007f97627c38e5 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007f975fdedb0b in  () at /usr/lib/x86_64-linux-gnu/libQt5Network.so.5
#13 0x00007f975fdf2010 in  () at /usr/lib/x86_64-linux-gnu/libQt5Network.so.5
#14 0x00007f975fdf23ba in  () at /usr/lib/x86_64-linux-gnu/libQt5Network.so.5
#15 0x00007f975fdddd21 in  () at /usr/lib/x86_64-linux-gnu/libQt5Network.so.5
#16 0x00007f97627c38e5 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x00007f975fdab593 in  () at /usr/lib/x86_64-linux-gnu/libQt5Network.so.5
#18 0x00007f975fdab644 in  () at /usr/lib/x86_64-linux-gnu/libQt5Network.so.5
#19 0x00007f975fdbdd21 in  () at /usr/lib/x86_64-linux-gnu/libQt5Network.so.5
#20 0x00007f9763da746c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#21 0x00007f9763daed34 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#22 0x00007f9762794de8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x00007f97627ee0dd in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#24 0x00007f975c7d5fb7 in g_main_context_dispatch () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007f975c7d61f0 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007f975c7d627c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#27 0x00007f97627ed47f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#28 0x00007f9762792e3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#29 0x00007f97625b23ca in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#30 0x00007f97625b729d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#31 0x00007f975e6ca7fc in start_thread (arg=0x7f96fd908700) at pthread_create.c:465
#32 0x00007f9761eb7b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 16 (Thread 0x7f96ff952700 (LWP 1810)):
#0  0x00007f9761eab951 in __GI___poll (fds=0x7f96f4012fc0, nfds=1, timeout=99632) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f975c7d6169 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f975c7d627c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f97627ed49b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f9762792e3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f97625b23ca in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f97625b729d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f975e6ca7fc in start_thread (arg=0x7f96ff952700) at pthread_create.c:465
#8  0x00007f9761eb7b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 15 (Thread 0x7f97057e9700 (LWP 1808)):
#0  0x00007f9761eab951 in __GI___poll (fds=0x7f96f8002de0, nfds=1, timeout=9632) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f975c7d6169 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f975c7d627c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f97627ed49b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f9762792e3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f97625b23ca in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f97625b729d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f975e6ca7fc in start_thread (arg=0x7f97057e9700) at pthread_create.c:465
#8  0x00007f9761eb7b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7f9705fea700 (LWP 1807)):
#0  0x00007f9761eab951 in __GI___poll (fds=0x55b85c89ec40, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f975c7d6169 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f975c7d6502 in g_main_loop_run () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9707677b26 in  () at /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f975c7fd645 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f975e6ca7fc in start_thread (arg=0x7f9705fea700) at pthread_create.c:465
#6  0x00007f9761eb7b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7f9715b30700 (LWP 1806)):
#0  0x00007f9761ea706d in __GI___libc_read (fd=16, buf=0x7f9715b2fbe0, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:26
#1  0x00007f975c81a280 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f975c7d5c4b in g_main_context_check () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f975c7d6110 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f975c7d627c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f975c7d62c1 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f975c7fd645 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f975e6ca7fc in start_thread (arg=0x7f9715b30700) at pthread_create.c:465
#8  0x00007f9761eb7b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7f97177fe700 (LWP 1803)):
#0  0x00007f975c81b5b9 in g_mutex_lock () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f975c7d56b3 in g_main_context_prepare () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f975c7d609b in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f975c7d627c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f97627ed49b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f9762792e3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f97625b23ca in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f97659a8846 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#8  0x00007f97625b729d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f975e6ca7fc in start_thread (arg=0x7f97177fe700) at pthread_create.c:465
#10 0x00007f9761eb7b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7f9717fff700 (LWP 1801)):
#0  0x00007f975e6d1072 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55b85c3822a0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f975e6d1072 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55b85c382250, cond=0x55b85c382278) at pthread_cond_wait.c:502
#2  0x00007f975e6d1072 in __pthread_cond_wait (cond=0x55b85c382278, mutex=0x55b85c382250) at pthread_cond_wait.c:655
#3  0x00007f9740b97d1b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f9740b97a38 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f975e6ca7fc in start_thread (arg=0x7f9717fff700) at pthread_create.c:465
#6  0x00007f9761eb7b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7f9734f76700 (LWP 1800)):
#0  0x00007f975e6d1072 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55b85c3822a0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f975e6d1072 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55b85c382250, cond=0x55b85c382278) at pthread_cond_wait.c:502
#2  0x00007f975e6d1072 in __pthread_cond_wait (cond=0x55b85c382278, mutex=0x55b85c382250) at pthread_cond_wait.c:655
#3  0x00007f9740b97d1b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f9740b97a38 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f975e6ca7fc in start_thread (arg=0x7f9734f76700) at pthread_create.c:465
#6  0x00007f9761eb7b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7f9735777700 (LWP 1799)):
#0  0x00007f975e6d1072 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55b85c3821bc) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f975e6d1072 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55b85c382168, cond=0x55b85c382190) at pthread_cond_wait.c:502
#2  0x00007f975e6d1072 in __pthread_cond_wait (cond=0x55b85c382190, mutex=0x55b85c382168) at pthread_cond_wait.c:655
#3  0x00007f9740b97d1b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f9740b97a38 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f975e6ca7fc in start_thread (arg=0x7f9735777700) at pthread_create.c:465
#6  0x00007f9761eb7b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7f9735f78700 (LWP 1798)):
#0  0x00007f975e6d1072 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55b85c3821bc) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f975e6d1072 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55b85c382168, cond=0x55b85c382190) at pthread_cond_wait.c:502
#2  0x00007f975e6d1072 in __pthread_cond_wait (cond=0x55b85c382190, mutex=0x55b85c382168) at pthread_cond_wait.c:655
#3  0x00007f9740b97d1b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f9740b97a38 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f975e6ca7fc in start_thread (arg=0x7f9735f78700) at pthread_create.c:465
#6  0x00007f9761eb7b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f9736779700 (LWP 1797)):
#0  0x00007f975e6d1072 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55b85c3821b8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f975e6d1072 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55b85c382168, cond=0x55b85c382190) at pthread_cond_wait.c:502
#2  0x00007f975e6d1072 in __pthread_cond_wait (cond=0x55b85c382190, mutex=0x55b85c382168) at pthread_cond_wait.c:655
#3  0x00007f9740b97d1b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f9740b97a38 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f975e6ca7fc in start_thread (arg=0x7f9736779700) at pthread_create.c:465
#6  0x00007f9761eb7b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f9736f7a700 (LWP 1796)):
#0  0x00007f975e6d1072 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55b85c386610) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f975e6d1072 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55b85c3865c0, cond=0x55b85c3865e8) at pthread_cond_wait.c:502
#2  0x00007f975e6d1072 in __pthread_cond_wait (cond=0x55b85c3865e8, mutex=0x55b85c3865c0) at pthread_cond_wait.c:655
#3  0x00007f9740b97d1b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f9740b97a38 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f975e6ca7fc in start_thread (arg=0x7f9736f7a700) at pthread_create.c:465
#6  0x00007f9761eb7b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f9737efa700 (LWP 1795)):
#0  0x00007f975e6d1072 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55b85c38132c) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f975e6d1072 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55b85c3812d8, cond=0x55b85c381300) at pthread_cond_wait.c:502
#2  0x00007f975e6d1072 in __pthread_cond_wait (cond=0x55b85c381300, mutex=0x55b85c3812d8) at pthread_cond_wait.c:655
#3  0x00007f9740b97d1b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f9740b97a38 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f975e6ca7fc in start_thread (arg=0x7f9737efa700) at pthread_create.c:465
#6  0x00007f9761eb7b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f9748c6a700 (LWP 1794)):
#0  0x00007f9761ea706d in __GI___libc_read (fd=9, buf=0x7f9748c69a70, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:26
#1  0x00007f975c81a280 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f975c7d5c4b in g_main_context_check () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f975c7d6110 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f975c7d627c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f97627ed49b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9762792e3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f97625b23ca in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f97631ccf45 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007f97625b729d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f975e6ca7fc in start_thread (arg=0x7f9748c6a700) at pthread_create.c:465
#11 0x00007f9761eb7b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f9749e82700 (LWP 1793)):
#0  0x00007f9761ea706d in __GI___libc_read (fd=7, buf=0x7f9749e81a60, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:26
#1  0x00007f975c81a280 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f975c7d5c4b in g_main_context_check () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f975c7d6110 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f975c7d627c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f97627ed49b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f9762792e3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f97625b23ca in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f97644b0e45 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#9  0x00007f97625b729d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f975e6ca7fc in start_thread (arg=0x7f9749e82700) at pthread_create.c:465
#11 0x00007f9761eb7b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f9752f82700 (LWP 1792)):
#0  0x00007f9761eab951 in __GI___poll (fds=0x7f9752f81bb8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f975c56e747 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f975c57053a in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f975550cf09 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f97625b729d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f975e6ca7fc in start_thread (arg=0x7f9752f82700) at pthread_create.c:465
#6  0x00007f9761eb7b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f97667c05c0 (LWP 1790)):
[KCrash Handler]
#6  0x00007f9761effb30 in __memcpy_ssse3 () at ../sysdeps/x86_64/multiarch/memcpy-ssse3.S:130
#7  0x00007f9740c9c4d5 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#8  0x00007f9740adf19b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#9  0x00007f9740ae0315 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#10 0x00007f9740ae16a1 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#11 0x00007f97409fc401 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#12 0x00007f9763951260 in  () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#13 0x00007f9763951d2f in  () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#14 0x00007f976391cb75 in  () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#15 0x00007f976391d4e8 in QOpenGLShaderProgram::link() () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#16 0x00007f9765a1ab78 in QSGDefaultRenderContext::compileShader(QSGMaterialShader*, QSGMaterial*, char const*, char const*) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#17 0x00007f97659e7796 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#18 0x00007f97659e8139 in QSGBatchRenderer::Renderer::renderMergedBatch(QSGBatchRenderer::Batch const*) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#19 0x00007f97659e9555 in QSGBatchRenderer::Renderer::renderBatches() () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#20 0x00007f97659eecac in QSGBatchRenderer::Renderer::render() () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#21 0x00007f97659df66d in QSGRenderer::renderScene(QSGBindable const&) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#22 0x00007f9765a20472 in QSGDefaultLayer::grab() () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#23 0x00007f9765a20ac5 in QSGDefaultLayer::updateTexture() () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#24 0x00007f9765b80196 in QQuickOpenGLShaderEffectMaterial::updateTextures() const () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#25 0x00007f97659dfce7 in QSGRenderer::preprocess() () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#26 0x00007f97659df637 in QSGRenderer::renderScene(QSGBindable const&) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#27 0x00007f9765a20472 in QSGDefaultLayer::grab() () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#28 0x00007f9765a20ac5 in QSGDefaultLayer::updateTexture() () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#29 0x00007f9765b80196 in QQuickOpenGLShaderEffectMaterial::updateTextures() const () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#30 0x00007f97659dfce7 in QSGRenderer::preprocess() () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#31 0x00007f97659df637 in QSGRenderer::renderScene(QSGBindable const&) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#32 0x00007f97659dfb2b in QSGRenderer::renderScene(unsigned int) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#33 0x00007f9765a19f50 in QSGDefaultRenderContext::renderNextFrame(QSGRenderer*, unsigned int) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#34 0x00007f9765a769b8 in QQuickWindowPrivate::renderSceneGraph(QSize const&) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#35 0x00007f9765a0c399 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#36 0x00007f9765a0d37a in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#37 0x00007f97635f6d35 in QWindow::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#38 0x00007f9765a80d05 in QQuickWindow::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#39 0x00007f9763da746c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#40 0x00007f9763daed34 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#41 0x00007f9762794de8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#42 0x00007f97635ebe5f in QGuiApplicationPrivate::processExposeEvent(QWindowSystemInterfacePrivate::ExposeEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#43 0x00007f97635eca9d in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#44 0x00007f97635c4cab in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#45 0x00007f975556f5a0 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#46 0x00007f975c7d5fb7 in g_main_context_dispatch () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#47 0x00007f975c7d61f0 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#48 0x00007f975c7d627c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#49 0x00007f97627ed47f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#50 0x00007f9762792e3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#51 0x00007f976279bda4 in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#52 0x000055b85a2ef1e8 in  ()
#53 0x00007f9761dc41c1 in __libc_start_main (main=0x55b85a2ee910, argc=1, argv=0x7fffffc4a7e8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffffc4a7d8) at ../csu/libc-start.c:308
#54 0x000055b85a2ef3ca in _start ()

Reported using DrKonqi