Application: umbrello (2.4.5) KDE Platform Version: 4.4.5 (KDE 4.4.5) Qt Version: 4.6.2 Operating System: Linux 2.6.32-30-generic x86_64 Distribution: Ubuntu 10.04.2 LTS -- Information about the crash: I tried to create a sequence diagram with several "overlapping" synchronous messages. Umbrello was not exactly doing what I was hoping for and it ended up in bit of a mess. I tried to press Undo several times to get rid of the changes and that's when the program crashed. -- Backtrace: Application: Umbrello UML Modeller (umbrello), signal: Segmentation fault [KCrash Handler] #5 0x0000000000ad5e20 in ?? () #6 0x00007f5eef699e01 in QUndoStack::undo() () from /usr/lib/libQtGui.so.4 #7 0x00007f5eef6bd390 in QUndoStack::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libQtGui.so.4 #8 0x00007f5eeeb58e3f in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4 #9 0x00007f5eef013032 in QAction::triggered(bool) () from /usr/lib/libQtGui.so.4 #10 0x00007f5eef0150ab in QAction::activate(QAction::ActionEvent) () from /usr/lib/libQtGui.so.4 #11 0x00007f5eef0169b7 in QAction::event(QEvent*) () from /usr/lib/libQtGui.so.4 #12 0x00007f5eef01922c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4 #13 0x00007f5eef01f6fb in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4 #14 0x00007f5ef0420a16 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5 #15 0x00007f5eeeb4606c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4 #16 0x00007f5eef054e86 in ?? () from /usr/lib/libQtGui.so.4 #17 0x00007f5eef056c97 in ?? () from /usr/lib/libQtGui.so.4 #18 0x00007f5eef021268 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4 #19 0x00007f5ef0420a16 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5 #20 0x00007f5eeeb4606c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4 #21 0x00007f5eef0c416a in ?? () from /usr/lib/libQtGui.so.4 #22 0x00007f5eef0c66f0 in ?? () from /usr/lib/libQtGui.so.4 #23 0x00007f5eef09d904 in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/libQtGui.so.4 #24 0x00007f5eef0c9882 in ?? () from /usr/lib/libQtGui.so.4 #25 0x00007f5eea3968c2 in g_main_context_dispatch () from /lib/libglib-2.0.so.0 #26 0x00007f5eea39a748 in ?? () from /lib/libglib-2.0.so.0 #27 0x00007f5eea39a8fc in g_main_context_iteration () from /lib/libglib-2.0.so.0 #28 0x00007f5eeeb6f513 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4 #29 0x00007f5eef0c946e in ?? () from /usr/lib/libQtGui.so.4 #30 0x00007f5eeeb44992 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4 #31 0x00007f5eeeb44d6c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4 #32 0x00007f5eeeb48aab in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4 #33 0x0000000000b6c6c5 in ?? () #34 0x00007f5eed7a7c4d in __libc_start_main () from /lib/libc.so.6 #35 0x0000000000435839 in _start () This bug may be a duplicate of or related to bug 266789. Possible duplicates by query: bug 270535, bug 267002, bug 266789, bug 264214, bug 262848. Reported using DrKonqi