Bug 420467

Application: gwenview (19.12.3)

Qt Version: 5.12.4
Frameworks Version: 5.67.0
Operating System: Linux 5.3.0-46-lowlatency x86_64
Windowing system: X11
Distribution: Ubuntu 19.10

-- Information about the crash:
- What I was doing when the application crashed:
1. open any image in Gwenview
2. double click on it to make it fullscreen
3. in fullscreen mode, before the top bar dissapears (!), start dragging the image
- Result:
Gwenview crashes immediately.

The crash can be reproduced every time.

-- Backtrace:
Application: Gwenview (gwenview), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f7c051c7ac0 (LWP 5631))]

Thread 3 (Thread 0x7f7bef816700 (LWP 7725)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x555bcda6ef50) at ../sysdeps/unix/sysv/linux/futex-internal.h:80
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x555bcda6ef00, cond=0x555bcda6ef28) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x555bcda6ef28, mutex=0x555bcda6ef00) at pthread_cond_wait.c:638
#3  0x00007f7c0b09adbf in QWaitCondition::wait(QMutex*, QDeadlineTimer) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f7c0b09aeb1 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f7c0ccf56c4 in ?? () from /usr/lib/x86_64-linux-gnu/libgwenviewlib.so.5
#6  0x00007f7c0b094c92 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f7c094b2669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#8  0x00007f7c0ad17323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f7c02dd3700 (LWP 5633)):
#0  0x00007f7c0ad0ac2f in __GI___poll (fds=0x7f7bf4011b20, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f7c08ad2aae in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7c08ad2be3 in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7c0b2b3653 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f7c0b25a5cb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f7c0b093a45 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f7c0aaaeefa in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007f7c0b094c92 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f7c094b2669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#9  0x00007f7c0ad17323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f7c051c7ac0 (LWP 5631)):
[KCrash Handler]
#6  0x00007f7c0b87632a in QCursor::shape() const () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#7  0x00007f7c0b8a3a80 in QBasicDrag::updateCursor(Qt::DropAction) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#8  0x00007f7c0488911a in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#9  0x00007f7c04889738 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#10 0x00007f7c0488c0d1 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#11 0x00007f7c0b8a1f55 in QBasicDrag::eventFilter(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#12 0x00007f7c0b25b60b in QCoreApplicationPrivate::sendThroughApplicationEventFilters(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007f7c0be94ac0 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#14 0x00007f7c0be9de00 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#15 0x00007f7c0b25ba2a in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#16 0x00007f7c0b868d73 in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#17 0x00007f7c0b86a5fb in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#18 0x00007f7c0b84426b in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#19 0x00007f7c0488328e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#20 0x00007f7c08ad28bd in g_main_context_dispatch () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007f7c08ad2b40 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007f7c08ad2be3 in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007f7c0b2b3635 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#24 0x00007f7c0b25a5cb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x00007f7c0b8a18d7 in QBasicDrag::drag(QDrag*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#26 0x00007f7c0b89f039 in QDragManager::drag(QDrag*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#27 0x00007f7c0b89f31a in QDrag::exec(QFlags<Qt::DropAction>, Qt::DropAction) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#28 0x00007f7c0ccaad4b in Gwenview::DocumentView::dragThumbnailLoaded(KFileItem const&, QPixmap const&) () from /usr/lib/x86_64-linux-gnu/libgwenviewlib.so.5
#29 0x00007f7c0b287558 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#30 0x00007f7c0cd45e72 in Gwenview::ThumbnailProvider::thumbnailLoaded(KFileItem const&, QPixmap const&, QSize const&, unsigned long long) () from /usr/lib/x86_64-linux-gnu/libgwenviewlib.so.5
#31 0x00007f7c0ccf833f in Gwenview::ThumbnailProvider::emitThumbnailLoaded(QImage const&, QSize const&) () from /usr/lib/x86_64-linux-gnu/libgwenviewlib.so.5
#32 0x00007f7c0ccf8707 in Gwenview::ThumbnailProvider::checkThumbnail() () from /usr/lib/x86_64-linux-gnu/libgwenviewlib.so.5
#33 0x00007f7c0b287e4a in QObject::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#34 0x00007f7c0be94a86 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#35 0x00007f7c0be9de00 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#36 0x00007f7c0b25ba2a in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#37 0x00007f7c0b25e6a8 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#38 0x00007f7c0b2b4037 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#39 0x00007f7c08ad28bd in g_main_context_dispatch () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#40 0x00007f7c08ad2b40 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#41 0x00007f7c08ad2be3 in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#42 0x00007f7c0b2b3635 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#43 0x00007f7c0b25a5cb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#44 0x00007f7c0b262336 in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#45 0x0000555bcb95baaa in ?? ()
#46 0x00007f7c0ac1c1e3 in __libc_start_main (main=0x555bcb95b600, argc=2, argv=0x7fff0920a258, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff0920a248) at ../csu/libc-start.c:308
#47 0x0000555bcb95c04e in _start ()
[Inferior 1 (process 5631) detached]

Possible duplicates by query: bug 405452, bug 403582, bug 384867, bug 353699, bug 350859.

Reported using DrKonqi