Application: umbrello (2.8.4)
KDE Platform Version: 4.8.4 (4.8.4)
Qt Version: 4.8.1
Operating System: Linux 3.2.0-27-generic i686
Distribution: Ubuntu 12.04 LTS

-- Information about the crash:
I clicked on duplicate class and the program crashed. Also if I press ctr+Z to undo the program crashes as well.

-- Backtrace:
Application: Umbrello UML Modeller (umbrello), signal: Segmentation fault
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0xb76ed740 (LWP 8629))]

Thread 3 (Thread 0xb744fb40 (LWP 8631)):
#0  0x00541416 in __kernel_vsyscall ()
#1  0x0164217b in read () from /lib/i386-linux-gnu/libc.so.6
#2  0x048066ae in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0x047c7bd2 in g_main_context_check () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0x047c8042 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0x047c856b in g_main_loop_run () from /lib/i386-linux-gnu/libglib-2.0.so.0
#6  0x01e77134 in ?? () from /usr/lib/i386-linux-gnu/gio/modules/libdconfsettings.so
#7  0x047eb6b3 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#8  0x007f9d4c in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#9  0x01652ace in clone () from /lib/i386-linux-gnu/libc.so.6

Thread 2 (Thread 0xb6affb40 (LWP 8632)):
#0  0x04807108 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#1  0x04807408 in g_mutex_unlock () from /lib/i386-linux-gnu/libglib-2.0.so.0
#2  0x047c780b in g_main_context_prepare () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0x047c7faf in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0x047c856b in g_main_loop_run () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0x01aca1ba in ?? () from /usr/lib/i386-linux-gnu/libgio-2.0.so.0
#6  0x047eb6b3 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#7  0x007f9d4c in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#8  0x01652ace in clone () from /lib/i386-linux-gnu/libc.so.6

Thread 1 (Thread 0xb76ed740 (LWP 8629)):
[KCrash Handler]
#7  UMLObjectList::copyInto (this=0xa13ea8c, rhs=0xa66e8ac) at ../../../umbrello/umbrello/umlobjectlist.cpp:40
#8  0x0831f405 in UMLClassifier::clone (this=0xa13ea58) at ../../../umbrello/umbrello/classifier.cpp:669
#9  0x08307563 in UMLWidget::slotMenuSelection (this=0x9e34510, action=0x0) at ../../../umbrello/umbrello/widgets/umlwidget.cpp:460
#10 0x08306484 in UMLWidget::qt_static_metacall (_o=0x9e34510, _c=QMetaObject::InvokeMetaMethod, _id=3, _a=0xbfe33f98) at ./umlwidget.moc:68
#11 0x018b16b1 in QMetaObject::activate (sender=0xa4a16c8, m=0x40dfb74, local_signal_index=2, argv=0xbfe33f98) at kernel/qobject.cpp:3547
#12 0x03c1b195 in QMenu::triggered (this=0xa4a16c8, _t1=0xa420ad8) at .moc/release-shared/moc_qmenu.cpp:178
#13 0x03c1c74d in QMenuPrivate::_q_actionTriggered (this=0xa0697e8) at widgets/qmenu.cpp:1146
#14 0x018b16b1 in QMetaObject::activate (sender=0xa420ad8, m=0x40d83f8, local_signal_index=1, argv=0xbfe340e8) at kernel/qobject.cpp:3547
#15 0x037599bd in QAction::triggered (this=0xa420ad8, _t1=false) at .moc/release-shared/moc_qaction.cpp:277
#16 0x03759c5b in QAction::activate (this=0xa420ad8, event=QAction::Trigger) at kernel/qaction.cpp:1257
#17 0x03c1b453 in QMenuPrivate::activateCausedStack (this=0xa0697e8, causedStack=..., action=0xa420ad8, action_e=QAction::Trigger, self=true) at widgets/qmenu.cpp:1028
#18 0x03c2232f in QMenuPrivate::activateAction (this=0xa0697e8, action=0xa420ad8, action_e=QAction::Trigger, self=true) at widgets/qmenu.cpp:1120
#19 0x03c25015 in QMenu::mouseReleaseEvent (this=0xa4a16c8, e=0xbfe34924) at widgets/qmenu.cpp:2360
#20 0x076cb70c in KMenu::mouseReleaseEvent (this=0xa4a16c8, e=0xbfe34924) at ../../kdeui/widgets/kmenu.cpp:464
#21 0x037bb1ac in QWidget::event (this=0xa4a16c8, event=0xbfe34924) at kernel/qwidget.cpp:8362
#22 0x03c23a9c in QMenu::event (this=0xa4a16c8, e=0xbfe34924) at widgets/qmenu.cpp:2469
#23 0x03760ed4 in notify_helper (e=0xbfe34924, receiver=0xa4a16c8, this=0x9b39ca8) at kernel/qapplication.cpp:4559
#24 QApplicationPrivate::notify_helper (this=0x9b39ca8, receiver=0xa4a16c8, e=0xbfe34924) at kernel/qapplication.cpp:4531
#25 0x03767024 in QApplication::notify (this=0x9b39ca8, receiver=0xa4a16c8, e=0xbfe34924) at kernel/qapplication.cpp:4102
#26 0x075ed401 in KApplication::notify (this=0xbfe3517c, receiver=0xa4a16c8, event=0xbfe34924) at ../../kdeui/kernel/kapplication.cpp:311
#27 0x0189a97e in QCoreApplication::notifyInternal (this=0xbfe3517c, receiver=0xa4a16c8, event=0xbfe34924) at kernel/qcoreapplication.cpp:876
#28 0x03761e95 in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#29 QApplicationPrivate::sendMouseEvent (receiver=0xa4a16c8, event=0xbfe34924, alienWidget=0x0, nativeWidget=0xa4a16c8, buttonDown=0x40f5cf4, lastMouseReceiver=..., spontaneous=true) at kernel/qapplication.cpp:3170
#30 0x037ee7d2 in QETWidget::translateMouseEvent (this=0xa4a16c8, event=0xbfe34ddc) at kernel/qapplication_x11.cpp:4551
#31 0x037ecc0d in QApplication::x11ProcessEvent (this=0xbfe3517c, event=0xbfe34ddc) at kernel/qapplication_x11.cpp:3732
#32 0x03819eac in x11EventSourceDispatch (s=0x9b39480, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#33 0x047c7d86 in g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
#34 0x047c8125 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#35 0x047c8201 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#36 0x018cd887 in QEventDispatcherGlib::processEvents (this=0x9b19740, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#37 0x03819aaa in QGuiEventDispatcherGlib::processEvents (this=0x9b19740, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#38 0x0189950d in QEventLoop::processEvents (this=0xbfe350d4, flags=...) at kernel/qeventloop.cpp:149
#39 0x018997a9 in QEventLoop::exec (this=0xbfe350d4, flags=...) at kernel/qeventloop.cpp:204
#40 0x0189eeba in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1148
#41 0x0375ea74 in QApplication::exec () at kernel/qapplication.cpp:3820
#42 0x0807855b in main (argc=<error reading variable: Cannot access memory at address 0x1>, argv=<error reading variable: Cannot access memory at address 0x5>) at ../../../umbrello/umbrello/main.cpp:111

Possible duplicates by query: bug 276804.

Reported using DrKonqi