Application: cantor (16.08.3)

Qt Version: 5.7.0
Frameworks Version: 5.28.0
Operating System: Linux 4.8.9-1-MANJARO x86_64
Distribution: "Manjaro Linux"

-- Information about the crash:
- What I was doing when the application crashed:
Running the python 3 backend. Clicking the X button to close the app makes the app crash. drkonqi suggest me to send the bug report.

The crash can be reproduced every time.

-- Backtrace:
Application: Cantor (cantor), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f9b29d4f7c0 (LWP 6260))]

Thread 2 (Thread 0x7f9b0f49c700 (LWP 6262)):
#0  0x00007f9b20c697a7 in  () at /usr/lib/libglib-2.0.so.0
#1  0x00007f9b20c6bc2b in g_main_context_prepare () at /usr/lib/libglib-2.0.so.0
#2  0x00007f9b20c6c6ab in  () at /usr/lib/libglib-2.0.so.0
#3  0x00007f9b20c6c89c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#4  0x00007f9b26a9a72b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f9b26a4423a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007f9b268670f3 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#7  0x00007f9b23091e55 in  () at /usr/lib/libQt5DBus.so.5
#8  0x00007f9b2686bd78 in  () at /usr/lib/libQt5Core.so.5
#9  0x00007f9b224ea454 in start_thread () at /usr/lib/libpthread.so.0
#10 0x00007f9b25f6a7df in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7f9b29d4f7c0 (LWP 6260)):
[KCrash Handler]
#6  0x0000000000000000 in  ()
#7  0x00007f9b26a719ce in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#8  0x00007f9b29391655 in KParts::Part::setStatusBarText(QString const&) () at /usr/lib/libKF5Parts.so.5
#9  0x00007f9afffcbb3b in  () at /usr/lib/qt/plugins/libcantorpart.so
#10 0x00007f9b00010d83 in  () at /usr/lib/qt/plugins/libcantorpart.so
#11 0x00007f9b26a71659 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#12 0x00007f9b2981587e in Cantor::Session::statusChanged(Cantor::Session::Status) () at /usr/lib/libcantorlibs.so.16
#13 0x00007f9b024e43cd in PythonSession::logout() () at /usr/lib/libcantor_pythonbackend.so
#14 0x00007f9afffdb469 in  () at /usr/lib/qt/plugins/libcantorpart.so
#15 0x00007f9afffdb529 in  () at /usr/lib/qt/plugins/libcantorpart.so
#16 0x00007f9b26a6fdc1 in QObjectPrivate::deleteChildren() () at /usr/lib/libQt5Core.so.5
#17 0x00007f9b2776889b in QWidget::~QWidget() () at /usr/lib/libQt5Widgets.so.5
#18 0x00007f9b27768b89 in QWidget::~QWidget() () at /usr/lib/libQt5Widgets.so.5
#19 0x00007f9b26a6fdc1 in QObjectPrivate::deleteChildren() () at /usr/lib/libQt5Core.so.5
#20 0x00007f9b2776889b in QWidget::~QWidget() () at /usr/lib/libQt5Widgets.so.5
#21 0x00007f9b278b5299 in QStackedWidget::~QStackedWidget() () at /usr/lib/libQt5Widgets.so.5
#22 0x00007f9b26a6fdc1 in QObjectPrivate::deleteChildren() () at /usr/lib/libQt5Core.so.5
#23 0x00007f9b2776889b in QWidget::~QWidget() () at /usr/lib/libQt5Widgets.so.5
#24 0x00007f9b278c1be9 in QTabWidget::~QTabWidget() () at /usr/lib/libQt5Widgets.so.5
#25 0x00007f9b26a6fdc1 in QObjectPrivate::deleteChildren() () at /usr/lib/libQt5Core.so.5
#26 0x00007f9b2776889b in QWidget::~QWidget() () at /usr/lib/libQt5Widgets.so.5
#27 0x00007f9b28e0832e in KMainWindow::~KMainWindow() () at /usr/lib/libKF5XmlGui.so.5
#28 0x000000000040da22 in  ()
#29 0x00007f9b26a724f0 in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#30 0x00007f9b2776d0eb in QWidget::event(QEvent*) () at /usr/lib/libQt5Widgets.so.5
#31 0x00007f9b2786b48b in QMainWindow::event(QEvent*) () at /usr/lib/libQt5Widgets.so.5
#32 0x00007f9b28e0ae6a in KMainWindow::event(QEvent*) () at /usr/lib/libKF5XmlGui.so.5
#33 0x00007f9b28e5c875 in KXmlGuiWindow::event(QEvent*) () at /usr/lib/libKF5XmlGui.so.5
#34 0x00007f9b27725e0c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#35 0x00007f9b2772d581 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#36 0x00007f9b26a45de0 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#37 0x00007f9b26a4856d in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/libQt5Core.so.5
#38 0x00007f9b26a9a303 in  () at /usr/lib/libQt5Core.so.5
#39 0x00007f9b20c6c587 in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#40 0x00007f9b20c6c7f0 in  () at /usr/lib/libglib-2.0.so.0
#41 0x00007f9b20c6c89c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#42 0x00007f9b26a9a70f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#43 0x00007f9b26a4423a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#44 0x00007f9b26a4c73c in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#45 0x000000000040c6ea in  ()
#46 0x00007f9b25ea2291 in __libc_start_main () at /usr/lib/libc.so.6
#47 0x000000000040d36a in _start ()

Reported using DrKonqi