QFileDialog::getOpenFileName crashes if mounting a disk

getOpenFileName will crash if a disk is mounted through the QFileDialog when exiting (both Cancel/Open).

It could also be a gtk issue, i'm not sure.

Here is the backtrace :

0x00007ffff2f731d5 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
#1 0x00007ffff2f76388 in __GI_abort () at abort.c:90
#2 0x00007ffff2fae7bb in __libc_message (do_abort=do_abort@entry=2, fmt=fmt@entry=0x7ffff30ab368 "*** Error in `%s': %s: 0x%s ***\n") at ../sysdeps/unix/sysv/linux/libc_fatal.c:199
#3 0x00007ffff2fb8a16 in malloc_printerr (action=3, str=0x7ffff30a730a "free(): invalid pointer", ptr=<optimized out>) at malloc.c:4923
#4 0x00007ffff2fb9793 in _int_free (av=<optimized out>, p=0xd6e580, have_lock=0) at malloc.c:3779
#5 0x00007fffe32fb892 in ?? () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#6 0x00007ffff26388da in g_object_unref () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#7 0x00007fffe32eb373 in ?? () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#8 0x00007fffe32ee54c in ?? () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#9 0x00007ffff26388da in g_object_unref () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#10 0x00007fffe329488a in ?? () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#11 0x00007fffe32c789f in ?? () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#12 0x00007ffff2633ea2 in g_closure_invoke () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#13 0x00007ffff2645274 in ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#14 0x00007ffff264cce9 in g_signal_emit_valist () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#15 0x00007ffff264cf32 in g_signal_emit () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#16 0x00007fffe3362c90 in ?? () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#17 0x00007ffff2639980 in g_object_run_dispose () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#18 0x00007fffe329488a in ?? () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#19 0x00007fffe32c789f in ?? () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#20 0x00007ffff2633ea2 in g_closure_invoke () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#21 0x00007ffff2645274 in ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#22 0x00007ffff264cce9 in g_signal_emit_valist () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#23 0x00007ffff264cf32 in g_signal_emit () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#24 0x00007fffe3362c90 in ?? () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#25 0x00007ffff2639980 in g_object_run_dispose () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#26 0x00007fffe32c789f in ?? () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#27 0x00007ffff2633f28 in g_closure_invoke () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#28 0x00007ffff2645274 in ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#29 0x00007ffff264cce9 in g_signal_emit_valist () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#30 0x00007ffff264cf32 in g_signal_emit () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#31 0x00007fffe3362c90 in ?? () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#32 0x00007ffff2639980 in g_object_run_dispose () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#33 0x00007ffff73c06dc in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#34 0x00007ffff74cfcb2 in QFileDialog::getOpenFileName(QWidget*, QString const&, QString const&, QString const&, QString*, QFlags<QFileDialog::Option>) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#35 0x000000000048d8f5 in MainWindow::on_action_Open_triggered (this=0x7fffffffe480) at /home/clementg/ClionProjects/digiprinux/Outils/MainWindow.cpp:44
#36 0x000000000049b172 in MainWindow::qt_static_metacall (_o=0x7fffffffe480, _c=QMetaObject::InvokeMetaMethod, _id=1, _a=0x7fffffffd580) at /home/clementg/.clion10/system/cmake/generated/7176ca28/7176ca28/Debug0/Outils/moc_MainWindow.cpp:93
#37 0x000000000049b2be in MainWindow::qt_metacall (this=0x7fffffffe480, _c=QMetaObject::InvokeMetaMethod, _id=1, _a=0x7fffffffd580) at /home/clementg/.clion10/system/cmake/generated/7176ca28/7176ca28/Debug0/Outils/moc_MainWindow.cpp:132
#38 0x00007ffff616e4fd in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#39 0x00007ffff72dbf72 in QAction::triggered(bool) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#40 0x00007ffff72de288 in QAction::activate(QAction::ActionEvent) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#41 0x00007ffff7448b3a in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#42 0x00007ffff744dc16 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#43 0x00007ffff7451f4a in QMenu::mouseReleaseEvent(QMouseEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#44 0x00007ffff731cb99 in QWidget::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#45 0x00007ffff745269b in QMenu::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#46 0x00007ffff72e2f1c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#47 0x00007ffff72e8879 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#48 0x00007ffff614886d in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#49 0x00007ffff72e6ba1 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#50 0x00007ffff733867d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#51 0x00007ffff733a5e3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#52 0x00007ffff72e2f1c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#53 0x00007ffff72e8006 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#54 0x00007ffff614886d in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#55 0x00007ffff66477a7 in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#56 0x00007ffff66492a5 in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#57 0x00007ffff66339e8 in QWindowSystemInterface::sendWindowSystemEventsImplementation(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#58 0x00007fffe68444a0 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so
#59 0x00007ffff236cea6 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#60 0x00007ffff236d1f8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#61 0x00007ffff236d29c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#62 0x00007ffff618f71c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#63 0x00007ffff61475bb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#64 0x00007ffff614db41 in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#65 0x000000000049650d in main (argc=1, argv=0x7fffffffe6d8) at /home/clementg/ClionProjects/Outils/main.cpp:41