Bug 440647

Application: okular (1.10.0)

Qt Version: 5.12.8
Frameworks Version: 5.68.0
Operating System: Linux 5.11.0-25-generic x86_64
Windowing system: X11
Distribution: Ubuntu 20.04.2 LTS

-- Information about the crash:
- What I was doing when the application crashed:
I proofred a scanned pdf (text as picture) and added several notes
- Unusual behavior I noticed:
Ocular crashed very often

- Custom settings of the application:

Kubuntu standard settings for ocular

The crash can be reproduced sometimes.

-- Backtrace:
Application: Okular (okular), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f49b84b5800 (LWP 16880))]

Thread 6 (Thread 0x7f499ff35700 (LWP 16886)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55a06c2fca68) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55a06c2fca18, cond=0x55a06c2fca40) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x55a06c2fca40, mutex=0x55a06c2fca18) at pthread_cond_wait.c:638
#3  0x00007f49a6835e7b in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007f49a6835a7b in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007f49baf80609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f49bb847293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f49a0736700 (LWP 16885)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55a06c2fca68) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55a06c2fca18, cond=0x55a06c2fca40) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x55a06c2fca40, mutex=0x55a06c2fca18) at pthread_cond_wait.c:638
#3  0x00007f49a6835e7b in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007f49a6835a7b in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007f49baf80609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f49bb847293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f49a0f37700 (LWP 16884)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55a06c2fca68) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55a06c2fca18, cond=0x55a06c2fca40) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x55a06c2fca40, mutex=0x55a06c2fca18) at pthread_cond_wait.c:638
#3  0x00007f49a6835e7b in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007f49a6835a7b in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007f49baf80609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f49bb847293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f49acf9f700 (LWP 16883)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55a06c2fca68) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55a06c2fca18, cond=0x55a06c2fca40) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x55a06c2fca40, mutex=0x55a06c2fca18) at pthread_cond_wait.c:638
#3  0x00007f49a6835e7b in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007f49a6835a7b in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007f49baf80609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f49bb847293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f49b5bff700 (LWP 16882)):
#0  0x00007f49ba5c94dd in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f49ba57bdac in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f49ba57c312 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f49ba57c4a3 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f49bbdd9583 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f49bbd804db in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f49bbbb8785 in QThread::exec() () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f49bc05befa in ?? () from /lib/x86_64-linux-gnu/libQt5DBus.so.5
#8  0x00007f49bbbb99d2 in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f49baf80609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#10 0x00007f49bb847293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f49b84b5800 (LWP 16880)):
[KCrash Handler]
#6  0x00007f49bbe62680 in QArrayData::shared_null () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f49bc8782b6 in QWidget::event(QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#8  0x00007f49bc925d52 in QFrame::event(QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#9  0x00007f49bbd8164b in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f49bc835a55 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#11 0x00007f49bc83fb93 in QApplication::notify(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#12 0x00007f49bbd8193a in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007f49bc89494a in ?? () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#14 0x00007f49bc8971ec in ?? () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#15 0x00007f49bc835a66 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#16 0x00007f49bc83f0f0 in QApplication::notify(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#17 0x00007f49bbd8193a in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#18 0x00007f49bc2067d3 in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) () from /lib/x86_64-linux-gnu/libQt5Gui.so.5
#19 0x00007f49bc20810b in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () from /lib/x86_64-linux-gnu/libQt5Gui.so.5
#20 0x00007f49bc1e235b in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Gui.so.5
#21 0x00007f49b7dae32e in ?? () from /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#22 0x00007f49ba57c17d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007f49ba57c400 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f49ba57c4a3 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007f49bbdd9565 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x00007f49bbd804db in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#27 0x00007f49bbd88246 in QCoreApplication::exec() () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#28 0x000055a06a7f9d9a in ?? ()
#29 0x00007f49bb74c0b3 in __libc_start_main (main=0x55a06a7f9680, argc=2, argv=0x7ffe3a87f838, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffe3a87f828) at ../csu/libc-start.c:308
#30 0x000055a06a7fb22e in ?? ()
[Inferior 1 (process 16880) detached]

Possible duplicates by query: bug 440137, bug 439216, bug 437334, bug 437297, bug 436863.

Reported using DrKonqi