Application: dolphin (18.04.0)

Qt Version: 5.10.1
Frameworks Version: 5.45.0
Operating System: Linux 4.16.3-1-ARCH x86_64
Distribution (Platform): Archlinux Packages

-- Information about the crash:
- What I was doing when the application crashed:
I was trying to mount a DVD ISO with CDemu. Once it was mounted, I got the following message when I tried to access the virtual device from Dolphin:

"An error occurred while accessing '[title of the DVD]', the system responded: The requested operation has failed: Error mounting /dev/sr1 at /run/media/magiblot/[title of the DVD]: wrong fs type, bad option, bad superblock on /dev/sr1, missing codepage or helper program, or other error" (probably a problem with the ISO or CDemu).

The crash happened after unmounting and mounting the virtual device several times, just after I picked the ISO again in CDEmu for the last time, without me interacting with Dolphin. It actually crashed while it was in the background.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Dolphin (dolphin), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f727972f800 (LWP 1516))]

Thread 5 (Thread 0x7f7229221700 (LWP 5259)):
#0  0x00007f726e05f3bd in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f7272f92fac in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
#2  0x00007f7272f8affc in QSemaphore::acquire(int) () at /usr/lib/libQt5Core.so.5
#3  0x00007f72437d72b7 in  () at /usr/lib/qt/plugins/texttospeech/libqttexttospeech_flite.so
#4  0x00007f7272f91acd in  () at /usr/lib/libQt5Core.so.5
#5  0x00007f726e05908c in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007f7278feae7f in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7f7253643700 (LWP 1520)):
#0  0x00007f7278fe097b in poll () at /usr/lib/libc.so.6
#1  0x00007f726b9c8523 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f726b9c863e in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f72731db264 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f727317d32b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f7272f8c72e in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f7272f91acd in  () at /usr/lib/libQt5Core.so.5
#7  0x00007f726e05908c in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007f7278feae7f in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7f725b95d700 (LWP 1518)):
#0  0x00007f7278fe097b in poll () at /usr/lib/libc.so.6
#1  0x00007f726b9c8523 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f726b9c863e in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f72731db264 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f727317d32b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f7272f8c72e in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f72735fe416 in  () at /usr/lib/libQt5DBus.so.5
#7  0x00007f7272f91acd in  () at /usr/lib/libQt5Core.so.5
#8  0x00007f726e05908c in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007f7278feae7f in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7f72620aa700 (LWP 1517)):
#0  0x00007f7278fe097b in poll () at /usr/lib/libc.so.6
#1  0x00007f726b307180 in  () at /usr/lib/libxcb.so.1
#2  0x00007f726b308e4b in xcb_wait_for_event () at /usr/lib/libxcb.so.1
#3  0x00007f7264c4482a in  () at /usr/lib/libQt5XcbQpa.so.5
#4  0x00007f7272f91acd in  () at /usr/lib/libQt5Core.so.5
#5  0x00007f726e05908c in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007f7278feae7f in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7f727972f800 (LWP 1516)):
[KCrash Handler]
#6  0x00007f72731b3a68 in QObjectPrivate::connectImpl(QObject const*, int, QObject const*, void**, QtPrivate::QSlotObjectBase*, Qt::ConnectionType, int const*, QMetaObject const*) () at /usr/lib/libQt5Core.so.5
#7  0x00007f72731b3c4c in QObject::connectImpl(QObject const*, void**, QObject const*, void**, QtPrivate::QSlotObjectBase*, Qt::ConnectionType, int const*, QMetaObject const*) () at /usr/lib/libQt5Core.so.5
#8  0x00007f7279318583 in  () at /usr/lib/libkdeinit5_dolphin.so
#9  0x00007f7279318792 in  () at /usr/lib/libkdeinit5_dolphin.so
#10 0x00007f72731af73f in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#11 0x00007f7273117e7f in QAbstractItemModel::rowsInserted(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib/libQt5Core.so.5
#12 0x00007f727311f6cd in QAbstractItemModel::endInsertRows() () at /usr/lib/libQt5Core.so.5
#13 0x00007f727874827d in  () at /usr/lib/libKF5KIOFileWidgets.so.5
#14 0x00007f727874893f in  () at /usr/lib/libKF5KIOFileWidgets.so.5
#15 0x00007f7278749f15 in  () at /usr/lib/libKF5KIOFileWidgets.so.5
#16 0x00007f72731af616 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#17 0x00007f7276fa89e3 in Solid::DeviceNotifier::deviceAdded(QString const&) () at /usr/lib/libKF5Solid.so.5
#18 0x00007f72731af616 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#19 0x00007f727702f973 in  () at /usr/lib/libKF5Solid.so.5
#20 0x00007f7276ff460b in  () at /usr/lib/libKF5Solid.so.5
#21 0x00007f72731af616 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#22 0x00007f727703315d in  () at /usr/lib/libKF5Solid.so.5
#23 0x00007f72770377b6 in  () at /usr/lib/libKF5Solid.so.5
#24 0x00007f7273609b5d in  () at /usr/lib/libQt5DBus.so.5
#25 0x00007f72731b0062 in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#26 0x00007f7274186fec in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#27 0x00007f727418e9c6 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#28 0x00007f727317ecf0 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#29 0x00007f7273181956 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/libQt5Core.so.5
#30 0x00007f72731dbc54 in  () at /usr/lib/libQt5Core.so.5
#31 0x00007f726b9c8368 in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#32 0x00007f726b9c85b1 in  () at /usr/lib/libglib-2.0.so.0
#33 0x00007f726b9c863e in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#34 0x00007f72731db241 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#35 0x00007f7264ccc482 in  () at /usr/lib/libQt5XcbQpa.so.5
#36 0x00007f727317d32b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#37 0x00007f7273186728 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#38 0x00007f72792eb9d6 in kdemain () at /usr/lib/libkdeinit5_dolphin.so
#39 0x00007f7278f15f4a in __libc_start_main () at /usr/lib/libc.so.6
#40 0x000055d05263377a in _start ()

Reported using DrKonqi