Application: dolphin (17.12.3)

Qt Version: 5.9.5
Frameworks Version: 5.44.0
Operating System: Linux 4.15.0-36-generic x86_64
Distribution: Ubuntu 18.04.1 LTS

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

Using Drag-and-drop to move an image into the Browser. The image might have been moved over other windows (Inkscape).

The crash can be reproduced sometimes.

-- Backtrace:
Application: Dolphin (dolphin), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f86f6a766c0 (LWP 3704))]

Thread 4 (Thread 0x7f86a5260700 (LWP 17559)):
#0  0x00007f86eb3d79f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x555d20d7ac50) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f86eb3d79f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x555d20d7ac00, cond=0x555d20d7ac28) at pthread_cond_wait.c:502
#2  0x00007f86eb3d79f3 in __pthread_cond_wait (cond=0x555d20d7ac28, mutex=0x555d20d7ac00) at pthread_cond_wait.c:655
#3  0x00007f86f02e259b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f86f02dac0b in QSemaphore::acquire(int) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f86c6e2680c in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/texttospeech/libqttexttospeech_flite.so
#6  0x00007f86f02e116d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f86eb3d16db in start_thread (arg=0x7f86a5260700) at pthread_create.c:463
#8  0x00007f86f631188f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f86cce3a700 (LWP 3723)):
#0  0x00007f86f6304bf9 in __GI___poll (fds=0x7f86c80049b0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f86e9260439 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f86e926054c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f86f051890b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f86f04bd9ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f86f02dc22a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f86f02e116d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f86eb3d16db in start_thread (arg=0x7f86cce3a700) at pthread_create.c:463
#8  0x00007f86f631188f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f86d4941700 (LWP 3708)):
#0  0x00007f86e925f99b in g_main_context_prepare () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f86e926036b in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f86e926054c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f86f051890b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f86f04bd9ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f86f02dc22a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f86f0995d45 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007f86f02e116d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f86eb3d16db in start_thread (arg=0x7f86d4941700) at pthread_create.c:463
#9  0x00007f86f631188f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f86f6a766c0 (LWP 3704)):
[KCrash Handler]
#6  0x00007f86e26b5dfb in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#7  0x00007f86f0cfe50c in QBasicDrag::eventFilter(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#8  0x00007f86f04bf53c in QCoreApplicationPrivate::sendThroughApplicationEventFilters(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f86f14c7868 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#10 0x00007f86f14cf0f4 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#11 0x00007f86f04bf9a8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007f86f0d0b523 in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#13 0x00007f86f0d0cff5 in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#14 0x00007f86f0ce42eb in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#15 0x00007f86e270a1c0 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#16 0x00007f86e9260287 in g_main_context_dispatch () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#17 0x00007f86e92604c0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#18 0x00007f86e926054c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#19 0x00007f86f05188ef in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x00007f86f04bd9ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#21 0x00007f86f0cff2d5 in QBasicDrag::drag(QDrag*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#22 0x00007f86f0d1e4f1 in QDragManager::drag(QDrag*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#23 0x00007f86f0d1ad67 in QDrag::exec(QFlags<Qt::DropAction>, Qt::DropAction) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#24 0x00007f86f5f48479 in KItemListController::startDragging() () at /usr/lib/x86_64-linux-gnu/libdolphinprivate.so.5
#25 0x00007f86f5f4868e in KItemListController::mouseMoveEvent(QGraphicsSceneMouseEvent*, QTransform const&) () at /usr/lib/x86_64-linux-gnu/libdolphinprivate.so.5
#26 0x00007f86f5f458aa in KItemListController::processEvent(QEvent*, QTransform const&) () at /usr/lib/x86_64-linux-gnu/libdolphinprivate.so.5
#27 0x00007f86f5f572e5 in KItemListView::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libdolphinprivate.so.5
#28 0x00007f86f14c782c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#29 0x00007f86f14cf0f4 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#30 0x00007f86f04bf9a8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#31 0x00007f86f17c7543 in  () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#32 0x00007f86f17c7908 in  () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#33 0x00007f86f17ccb76 in QGraphicsScene::mouseMoveEvent(QGraphicsSceneMouseEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#34 0x00007f86f17d69e4 in QGraphicsScene::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#35 0x00007f86f14c782c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#36 0x00007f86f14cf0f4 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#37 0x00007f86f04bf9a8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#38 0x00007f86f17f20c0 in QGraphicsViewPrivate::mouseMoveEventHandler(QMouseEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#39 0x00007f86f1506038 in QWidget::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#40 0x00007f86f15a74be in QFrame::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#41 0x00007f86f17f4bfb in QGraphicsView::viewportEvent(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#42 0x00007f86f04bf68c in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#43 0x00007f86f14c7805 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#44 0x00007f86f14cf64f in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#45 0x00007f86f04bf9a8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#46 0x00007f86f14ce622 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#47 0x00007f86f152114b in  () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#48 0x00007f86f15237ba in  () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#49 0x00007f86f14c782c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#50 0x00007f86f14cf0f4 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#51 0x00007f86f04bf9a8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#52 0x00007f86f0d0b523 in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#53 0x00007f86f0d0cff5 in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#54 0x00007f86f0ce42eb in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#55 0x00007f86e270a1c0 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#56 0x00007f86e9260287 in g_main_context_dispatch () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#57 0x00007f86e92604c0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#58 0x00007f86e926054c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#59 0x00007f86f05188ef in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#60 0x00007f86f04bd9ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#61 0x00007f86f04c6a84 in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#62 0x00007f86f6624baa in kdemain () at /usr/lib/x86_64-linux-gnu/libkdeinit5_dolphin.so
#63 0x00007f86f6211b97 in __libc_start_main (main=0x555d1f9d6730, argc=1, argv=0x7ffe5fbd36d8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffe5fbd36c8) at ../csu/libc-start.c:310
#64 0x0000555d1f9d676a in _start ()

Reported using DrKonqi