Application: kompare (4.1.3)
KDE Platform Version: 4.14.4
Qt Version: 4.8.6
Operating System: Linux 3.18.7-200.fc21.x86_64 x86_64
Distribution (Platform): Fedora RPMs

-- Information about the crash:
Opening the attached git patch and pressing the "next file" button five times makes kompare crash with a segfault.

The crash can be reproduced every time.

-- Backtrace:
Application: Kompare (kompare), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fefcdabc880 (LWP 25822))]

Thread 2 (Thread 0x7fefb9b5a700 (LWP 25823)):
#0  0x000000353a8f51fd in poll () at /lib64/libc.so.6
#1  0x000000353c849e24 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x000000353c849f3c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x0000003a629b4a3e in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQtCore.so.4
#4  0x0000003a62984261 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQtCore.so.4
#5  0x0000003a629845c5 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQtCore.so.4
#6  0x0000003a62879b59 in QThread::exec() () at /lib64/libQtCore.so.4
#7  0x0000003a62964cc3 in QInotifyFileSystemWatcherEngine::run() () at /lib64/libQtCore.so.4
#8  0x0000003a6287c3bf in QThreadPrivate::start(void*) () at /lib64/libQtCore.so.4
#9  0x000000353b00752a in start_thread () at /lib64/libpthread.so.0
#10 0x000000353a90079d in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7fefcdabc880 (LWP 25822)):
[KCrash Handler]
#5  0x0000003a649620b0 in QTreeModel::index(QTreeWidgetItem const*, int) const () at /lib64/libQtGui.so.4
#6  0x0000003a649636ab in QTreeWidget::setCurrentItem(QTreeWidgetItem*, int) () at /lib64/libQtGui.so.4
#7  0x00007fefc20dcdd9 in KompareNavTreePart::setSelectedFile(Diff2::DiffModel const*) () at /usr/lib64/kde4/komparenavtreepart.so
#8  0x00007fefc20ddcfa in KompareNavTreePart::slotSetSelection(Diff2::DiffModel const*, Diff2::Difference const*) () at /usr/lib64/kde4/komparenavtreepart.so
#9  0x00007fefc20dffcb in KompareNavTreePart::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) [clone .part.40] () at /usr/lib64/kde4/komparenavtreepart.so
#10 0x0000003a6299a25c in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () at /lib64/libQtCore.so.4
#11 0x00007fefc256d53b in KomparePart::setSelection(Diff2::DiffModel const*, Diff2::Difference const*) () at /usr/lib64/kde4/komparepart.so
#12 0x00007fefc25733f3 in KomparePart::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) [clone .part.21] () at /usr/lib64/kde4/komparepart.so
#13 0x0000003a6299a25c in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () at /lib64/libQtCore.so.4
#14 0x0000003a6960dceb in Diff2::KompareModelList::setSelection(Diff2::DiffModel const*, Diff2::Difference const*) () at /lib64/libkomparediff2.so.4
#15 0x0000003a6961069e in Diff2::KompareModelList::slotNextModel() () at /lib64/libkomparediff2.so.4
#16 0x0000003a69619bad in Diff2::KompareModelList::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) [clone .part.33] () at /lib64/libkomparediff2.so.4
#17 0x0000003a6299a25c in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () at /lib64/libQtCore.so.4
#18 0x0000003a643c1792 in QAction::triggered(bool) () at /lib64/libQtGui.so.4
#19 0x0000003a643c3317 in QAction::activate(QAction::ActionEvent) () at /lib64/libQtGui.so.4
#20 0x0000003a64797763 in QAbstractButtonPrivate::click() () at /lib64/libQtGui.so.4
#21 0x0000003a647978b4 in QAbstractButton::mouseReleaseEvent(QMouseEvent*) () at /lib64/libQtGui.so.4
#22 0x0000003a6485961a in QToolButton::mouseReleaseEvent(QMouseEvent*) () at /lib64/libQtGui.so.4
#23 0x0000003a6441b118 in QWidget::event(QEvent*) () at /lib64/libQtGui.so.4
#24 0x0000003a643c7efc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib64/libQtGui.so.4
#25 0x0000003a643ceabf in QApplication::notify(QObject*, QEvent*) () at /lib64/libQtGui.so.4
#26 0x0000003a6624e86a in KApplication::notify(QObject*, QEvent*) () at /lib64/libkdeui.so.5
#27 0x0000003a6298570d in QCoreApplication::notifyInternal(QObject*, QEvent*) () at /lib64/libQtCore.so.4
#28 0x0000003a643ce11f in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) () at /lib64/libQtGui.so.4
#29 0x0000003a64444532 in QETWidget::translateMouseEvent(_XEvent const*) () at /lib64/libQtGui.so.4
#30 0x0000003a64442f2c in QApplication::x11ProcessEvent(_XEvent*) () at /lib64/libQtGui.so.4
#31 0x0000003a6446afb4 in x11EventSourceDispatch(_GSource*, int (*)(void*), void*) () at /lib64/libQtGui.so.4
#32 0x000000353c849aeb in g_main_context_dispatch () at /lib64/libglib-2.0.so.0
#33 0x000000353c849e88 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#34 0x000000353c849f3c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#35 0x0000003a629b4a1e in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQtCore.so.4
#36 0x0000003a6446b136 in QGuiEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQtGui.so.4
#37 0x0000003a62984261 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQtCore.so.4
#38 0x0000003a629845c5 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQtCore.so.4
#39 0x0000003a62989ca9 in QCoreApplication::exec() () at /lib64/libQtCore.so.4
#40 0x00000000004091d2 in main ()

Possible duplicates by query: bug 343535.

Reported using DrKonqi