https://bugs.kde.org/show_bug.cgi?id=440979

            Bug ID: 440979
           Summary: Random segfault when drawing.
           Product: krita
           Version: unspecified
          Platform: Neon Packages
                OS: Linux
            Status: REPORTED
          Keywords: drkonqi
          Severity: crash
          Priority: NOR
         Component: General
          Assignee: krita-bugs-n...@kde.org
          Reporter: griffinval...@gmail.com
  Target Milestone: ---

Application: krita (5.0.0-prealpha (git e139d82))

Qt Version: 5.15.3
Frameworks Version: 5.84.0
Operating System: Linux 5.4.0-80-generic x86_64
Windowing System: X11
Drkonqi Version: 5.22.4
Distribution: KDE neon User Edition 5.22

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

 was trying to get a turn table setup, but when I draw the top view, Krita
seems to give this weird backtrace.

It's a bit tricky to explain what getting a turntable set up involves, but
it...
- Uses mirror tool
- Uses pixel brush
- Uses two parallel assistants.
- Uses animation
- Uses reference images.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Krita (krita), signal: Segmentation fault

[New LWP 3643756]
[New LWP 3643757]
[New LWP 3643758]
[New LWP 3643759]
[New LWP 3643760]
[New LWP 3644122]
[New LWP 3644140]
[New LWP 3644161]
[New LWP 3644166]
[New LWP 3644187]
[New LWP 3644188]
[New LWP 3646648]
[New LWP 3646653]
[New LWP 3646654]
[New LWP 3646655]
[New LWP 3646656]
[New LWP 3646657]
[New LWP 3646658]
[New LWP 3646659]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
0x00007f829bbd8aff in __GI___poll (fds=0x7ffcee59fa38, nfds=1, timeout=1000) at
../sysdeps/unix/sysv/linux/poll.c:29
[Current thread is 1 (Thread 0x7f829499ad80 (LWP 3643727))]

Thread 20 (Thread 0x7f823def0700 (LWP 3646659)):
#0  futex_abstimed_wait_cancelable (private=<optimized out>,
abstime=0x7f823deefc10, clockid=<optimized out>, expected=0,
futex_word=0x608000eaedf0) at ../sysdeps/nptl/futex-internal.h:320
#1  __pthread_cond_wait_common (abstime=0x7f823deefc10, clockid=<optimized
out>, mutex=0x608000eaeda0, cond=0x608000eaedc8) at pthread_cond_wait.c:520
#2  __pthread_cond_timedwait (cond=0x608000eaedc8, mutex=0x608000eaeda0,
abstime=0x7f823deefc10) at pthread_cond_wait.c:656
#3  0x00007f829bf87eb8 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f829bf853c1 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f829bf81dbc in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f829ba98609 in start_thread (arg=<optimized out>) at
pthread_create.c:477
#7  0x00007f829bbe5293 in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 19 (Thread 0x7f823e6f1700 (LWP 3646658)):
#0  futex_abstimed_wait_cancelable (private=<optimized out>,
abstime=0x7f823e6f0c10, clockid=<optimized out>, expected=0,
futex_word=0x608000c036f4) at ../sysdeps/nptl/futex-internal.h:320
#1  __pthread_cond_wait_common (abstime=0x7f823e6f0c10, clockid=<optimized
out>, mutex=0x608000c036a0, cond=0x608000c036c8) at pthread_cond_wait.c:520
#2  __pthread_cond_timedwait (cond=0x608000c036c8, mutex=0x608000c036a0,
abstime=0x7f823e6f0c10) at pthread_cond_wait.c:656
#3  0x00007f829bf87eb8 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f829bf853c1 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f829bf81dbc in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f829ba98609 in start_thread (arg=<optimized out>) at
pthread_create.c:477
#7  0x00007f829bbe5293 in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 18 (Thread 0x7f8244ded700 (LWP 3646657)):
#0  futex_abstimed_wait_cancelable (private=<optimized out>,
abstime=0x7f8244decc10, clockid=<optimized out>, expected=0,
futex_word=0x6080000349f0) at ../sysdeps/nptl/futex-internal.h:320
#1  __pthread_cond_wait_common (abstime=0x7f8244decc10, clockid=<optimized
out>, mutex=0x6080000349a0, cond=0x6080000349c8) at pthread_cond_wait.c:520
#2  __pthread_cond_timedwait (cond=0x6080000349c8, mutex=0x6080000349a0,
abstime=0x7f8244decc10) at pthread_cond_wait.c:656
#3  0x00007f829bf87eb8 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f829bf853c1 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f829bf81dbc in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f829ba98609 in start_thread (arg=<optimized out>) at
pthread_create.c:477
#7  0x00007f829bbe5293 in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 17 (Thread 0x7f824c5d6700 (LWP 3646656)):
#0  futex_abstimed_wait_cancelable (private=<optimized out>,
abstime=0x7f824c5d5c10, clockid=<optimized out>, expected=0,
futex_word=0x608000034a70) at ../sysdeps/nptl/futex-internal.h:320
#1  __pthread_cond_wait_common (abstime=0x7f824c5d5c10, clockid=<optimized
out>, mutex=0x608000034a20, cond=0x608000034a48) at pthread_cond_wait.c:520
#2  __pthread_cond_timedwait (cond=0x608000034a48, mutex=0x608000034a20,
abstime=0x7f824c5d5c10) at pthread_cond_wait.c:656
#3  0x00007f829bf87eb8 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f829bf853c1 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f829bf81dbc in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f829ba98609 in start_thread (arg=<optimized out>) at
pthread_create.c:477
#7  0x00007f829bbe5293 in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 16 (Thread 0x7f824bdd5700 (LWP 3646655)):
#0  futex_abstimed_wait_cancelable (private=<optimized out>,
abstime=0x7f824bdd4c10, clockid=<optimized out>, expected=0,
futex_word=0x608000036ff4) at ../sysdeps/nptl/futex-internal.h:320
#1  __pthread_cond_wait_common (abstime=0x7f824bdd4c10, clockid=<optimized
out>, mutex=0x608000036fa0, cond=0x608000036fc8) at pthread_cond_wait.c:520
#2  __pthread_cond_timedwait (cond=0x608000036fc8, mutex=0x608000036fa0,
abstime=0x7f824bdd4c10) at pthread_cond_wait.c:656
#3  0x00007f829bf87eb8 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f829bf853c1 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f829bf81dbc in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f829ba98609 in start_thread (arg=<optimized out>) at
pthread_create.c:477
#7  0x00007f829bbe5293 in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 15 (Thread 0x7f823d6ef700 (LWP 3646654)):
#0  futex_abstimed_wait_cancelable (private=<optimized out>,
abstime=0x7f823d6eec10, clockid=<optimized out>, expected=0,
futex_word=0x6080012f3870) at ../sysdeps/nptl/futex-internal.h:320
#1  __pthread_cond_wait_common (abstime=0x7f823d6eec10, clockid=<optimized
out>, mutex=0x6080012f3820, cond=0x6080012f3848) at pthread_cond_wait.c:520
#2  __pthread_cond_timedwait (cond=0x6080012f3848, mutex=0x6080012f3820,
abstime=0x7f823d6eec10) at pthread_cond_wait.c:656
#3  0x00007f829bf87eb8 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f829bf853c1 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f829bf81dbc in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f829ba98609 in start_thread (arg=<optimized out>) at
pthread_create.c:477
#7  0x00007f829bbe5293 in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7f824e95a700 (LWP 3646653)):
#0  futex_abstimed_wait_cancelable (private=<optimized out>,
abstime=0x7f824e959c10, clockid=<optimized out>, expected=0,
futex_word=0x608000b6b474) at ../sysdeps/nptl/futex-internal.h:320
#1  __pthread_cond_wait_common (abstime=0x7f824e959c10, clockid=<optimized
out>, mutex=0x608000b6b420, cond=0x608000b6b448) at pthread_cond_wait.c:520
#2  __pthread_cond_timedwait (cond=0x608000b6b448, mutex=0x608000b6b420,
abstime=0x7f824e959c10) at pthread_cond_wait.c:656
#3  0x00007f829bf87eb8 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f829bf853c1 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f829bf81dbc in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f829ba98609 in start_thread (arg=<optimized out>) at
pthread_create.c:477
#7  0x00007f829bbe5293 in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7f823ceee700 (LWP 3646648)):
#0  futex_abstimed_wait_cancelable (private=<optimized out>,
abstime=0x7f823ceedc10, clockid=<optimized out>, expected=0,
futex_word=0x608000fdbd70) at ../sysdeps/nptl/futex-internal.h:320
#1  __pthread_cond_wait_common (abstime=0x7f823ceedc10, clockid=<optimized
out>, mutex=0x608000fdbd20, cond=0x608000fdbd48) at pthread_cond_wait.c:520
#2  __pthread_cond_timedwait (cond=0x608000fdbd48, mutex=0x608000fdbd20,
abstime=0x7f823ceedc10) at pthread_cond_wait.c:656
#3  0x00007f829bf87eb8 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f829bf853c1 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f829bf81dbc in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f829ba98609 in start_thread (arg=<optimized out>) at
pthread_create.c:477
#7  0x00007f829bbe5293 in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7f8243018700 (LWP 3644188)):
#0  0x00007f829bbd8aff in __GI___poll (fds=0x6020001804b0, nfds=1,
timeout=8469) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f82a1dd95ba in poll () at /usr/lib/x86_64-linux-gnu/libasan.so.5
#2  0x00007f82973eb36e in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f82973eb4a3 in g_main_context_iteration () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f829c1c2fcb in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f829c16725b in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f829bf80c22 in QThread::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f829bf81dbc in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f829ba98609 in start_thread (arg=<optimized out>) at
pthread_create.c:477
#9  0x00007f829bbe5293 in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7f8267154700 (LWP 3644187)):
#0  __GI___libc_read (nbytes=16, buf=0x7f8267153a90, fd=35) at
../sysdeps/unix/sysv/linux/read.c:26
#1  __GI___libc_read (fd=35, buf=0x7f8267153a90, nbytes=16) at
../sysdeps/unix/sysv/linux/read.c:24
#2  0x00007f82a1df5230 in  () at /usr/lib/x86_64-linux-gnu/libasan.so.5
#3  0x00007f8297433b2f in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f82973eaebe in g_main_context_check () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f82973eb312 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f82973eb4a3 in g_main_context_iteration () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f829c1c2fcb in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f829c16725b in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f829bf80c22 in QThread::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f829bf81dbc in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007f829ba98609 in start_thread (arg=<optimized out>) at
pthread_create.c:477
#12 0x00007f829bbe5293 in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7f8254ea2700 (LWP 3644166)):
#0  0x00007f82973eaad0 in g_main_context_query () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f82973eb2e8 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f82973eb4a3 in g_main_context_iteration () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f829c1c2fcb in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f829c16725b in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f829bf80c22 in QThread::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f82867153ba in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007f829bf81dbc in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f829ba98609 in start_thread (arg=<optimized out>) at
pthread_create.c:477
#9  0x00007f829bbe5293 in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7f8260bd6700 (LWP 3644161)):
#0  0x00007f829bbd8aff in __GI___poll (fds=0x60200007e4b0, nfds=1, timeout=-1)
at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f82a1dd95ba in poll () at /usr/lib/x86_64-linux-gnu/libasan.so.5
#2  0x00007f82973eb36e in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f82973eb4a3 in g_main_context_iteration () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f829c1c2fcb in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f829c16725b in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f829bf80c22 in QThread::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f8286460559 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f829bf81dbc in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f829ba98609 in start_thread (arg=<optimized out>) at
pthread_create.c:477
#10 0x00007f829bbe5293 in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7f825e800700 (LWP 3644140)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007f829bf84340 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f829bf841a6 in QSemaphore::tryAcquire(int, int) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f829de9693f in KisTileDataSwapper::waitForWork()
(this=this@entry=0x7f829f557cc0 <(anonymous
namespace)::Q_QGS_s_instance::innerFunction()::holder+64>) at
/home/wolthera/krita/src/libs/image/tiles3/swap/kis_tile_data_swapper.cpp:74
#4  0x00007f829de97192 in KisTileDataSwapper::run() (this=0x7f829f557cc0
<(anonymous namespace)::Q_QGS_s_instance::innerFunction()::holder+64>) at
/home/wolthera/krita/src/libs/image/tiles3/swap/kis_tile_data_swapper.cpp:80
#5  0x00007f829bf81dbc in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f829ba98609 in start_thread (arg=<optimized out>) at
pthread_create.c:477
#7  0x00007f829bbe5293 in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f8277ee5700 (LWP 3644122)):
#0  0x00007f829bbd8aff in __GI___poll (fds=0x6020009db7b0, nfds=1, timeout=-1)
at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f82a1dd95ba in poll () at /usr/lib/x86_64-linux-gnu/libasan.so.5
#2  0x00007f82973eb36e in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f82973eb4a3 in g_main_context_iteration () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f829c1c2fcb in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f829c16725b in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f829bf80c22 in QThread::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f829bf81dbc in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f829ba98609 in start_thread (arg=<optimized out>) at
pthread_create.c:477
#9  0x00007f829bbe5293 in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f8285142700 (LWP 3643760)):
#0  __GI___libc_read (nbytes=16, buf=0x7f8285141a60, fd=13) at
../sysdeps/unix/sysv/linux/read.c:26
#1  __GI___libc_read (fd=13, buf=0x7f8285141a60, nbytes=16) at
../sysdeps/unix/sysv/linux/read.c:24
#2  0x00007f82a1df5230 in  () at /usr/lib/x86_64-linux-gnu/libasan.so.5
#3  0x00007f8297433b2f in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f82973eaebe in g_main_context_check () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f82973eb312 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f82973eb4a3 in g_main_context_iteration () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f829c1c2fcb in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f829c16725b in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f829bf80c22 in QThread::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f8297154f4b in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#11 0x00007f829bf81dbc in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007f829ba98609 in start_thread (arg=<optimized out>) at
pthread_create.c:477
#13 0x00007f829bbe5293 in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f8285abf700 (LWP 3643759)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0,
futex_word=0x614000008908) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x6140000088b8,
cond=0x6140000088e0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x6140000088e0, mutex=0x6140000088b8) at
pthread_cond_wait.c:638
#3  0x00007f828e769b5b in  () at /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007f828e76975b in  () at /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007f829ba98609 in start_thread (arg=<optimized out>) at
pthread_create.c:477
#6  0x00007f829bbe5293 in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f82891c9700 (LWP 3643758)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0,
futex_word=0x614000008908) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x6140000088b8,
cond=0x6140000088e0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x6140000088e0, mutex=0x6140000088b8) at
pthread_cond_wait.c:638
#3  0x00007f828e769b5b in  () at /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007f828e76975b in  () at /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007f829ba98609 in start_thread (arg=<optimized out>) at
pthread_create.c:477
#6  0x00007f829bbe5293 in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f82889c8700 (LWP 3643757)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0,
futex_word=0x614000008908) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x6140000088b8,
cond=0x6140000088e0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x6140000088e0, mutex=0x6140000088b8) at
pthread_cond_wait.c:638
#3  0x00007f828e769b5b in  () at /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007f828e76975b in  () at /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007f829ba98609 in start_thread (arg=<optimized out>) at
pthread_create.c:477
#6  0x00007f829bbe5293 in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f82881c7700 (LWP 3643756)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0,
futex_word=0x614000008908) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x6140000088b8,
cond=0x6140000088e0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x6140000088e0, mutex=0x6140000088b8) at
pthread_cond_wait.c:638
#3  0x00007f828e769b5b in  () at /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007f828e76975b in  () at /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007f829ba98609 in start_thread (arg=<optimized out>) at
pthread_create.c:477
#6  0x00007f829bbe5293 in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f829499ad80 (LWP 3643727)):
[KCrash Handler]
#5  0x00007f829c17186c in QMetaObject::cast(QObject const*) const () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f829cdb68d0 in QMdiArea::eventFilter(QObject*, QEvent*) () at
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#7  0x00007f829c16838e in
QCoreApplicationPrivate::sendThroughApplicationEventFilters(QObject*, QEvent*)
() at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f829cc42e00 in QApplicationPrivate::notify_helper(QObject*, QEvent*)
() at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#9  0x00007f829cc4bbb8 in QApplication::notify(QObject*, QEvent*) () at
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#10 0x00007f82a10cd3b5 in KisApplication::notify(QObject*, QEvent*)
(this=<optimized out>, receiver=0x603000c033d0, event=0x60b002a0a240) at
/home/wolthera/krita/src/libs/ui/KisApplication.cpp:703
#11 0x00007f829c16875a in QCoreApplication::notifyInternal2(QObject*, QEvent*)
() at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007f829c16b061 in QCoreApplicationPrivate::sendPostedEvents(QObject*,
int, QThreadData*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007f829c1c3957 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#14 0x00007f82973eb17d in g_main_context_dispatch () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#15 0x00007f82973eb400 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#16 0x00007f82973eb4a3 in g_main_context_iteration () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#17 0x00007f829c1c2fb2 in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#18 0x00007f829c16725b in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x00007f829c16f414 in QCoreApplication::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x000055abc8aae2b8 in main(int, char**) (argc=<optimized out>,
argv=<optimized out>) at /home/wolthera/krita/src/krita/main.cc:677
[Inferior 1 (process 3643727) detached]

Possible duplicates by query: bug 440377, bug 440343, bug 440193, bug 440179,
bug 440137.

Reported using DrKonqi

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