Application: umbrello (2.6.2)
KDE Platform Version: 4.6.2 (4.6.2)
Qt Version: 4.7.2
Operating System: Linux 2.6.38-11-generic-pae i686
Distribution: Ubuntu 11.04

-- Information about the crash:
While having open project (very simple, 4 classes), I changed default line width.  The app crashed afterwards.

-- Backtrace:
Application: Umbrello UML Modeller (umbrello), signal: Segmentation fault
[Current thread is 1 (Thread 0xb4e96710 (LWP 25222))]

Thread 3 (Thread 0xb4a7db70 (LWP 25224)):
#0  0xb5323f2e in g_main_context_prepare () from /lib/i386-linux-gnu/libglib-2.0.so.0
#1  0xb5324e63 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#2  0xb532592b in g_main_loop_run () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb4bba304 in ?? () from /usr/lib/i386-linux-gnu/libgio-2.0.so.0
#4  0xb534e2df in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0xb5a8ee99 in start_thread (arg=0xb4a7db70) at pthread_create.c:304
#6  0xb5b7273e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130

Thread 2 (Thread 0xae062b70 (LWP 25226)):
#0  pthread_once () at ../nptl/sysdeps/unix/sysv/linux/i386/pthread_once.S:36
#1  0xb604feb2 in get_thread_data () at thread/qthread_unix.cpp:160
#2  QThreadData::current () at thread/qthread_unix.cpp:199
#3  0xb6170ff5 in postEventSourcePrepare (s=0x8c9b410, timeout=0xae0620dc) at kernel/qeventdispatcher_glib.cpp:254
#4  0xb5323fd4 in g_main_context_prepare () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0xb5324e63 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#6  0xb5325524 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#7  0xb6171577 in QEventDispatcherGlib::processEvents (this=0x8d56fd8, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#8  0xb6143289 in QEventLoop::processEvents (this=0xae062290, flags=...) at kernel/qeventloop.cpp:149
#9  0xb6143522 in QEventLoop::exec (this=0xae062290, flags=...) at kernel/qeventloop.cpp:201
#10 0xb604d2a0 in QThread::exec (this=0x8d59ed0) at thread/qthread.cpp:492
#11 0xb6124fdb in QInotifyFileSystemWatcherEngine::run (this=0x8d59ed0) at io/qfilesystemwatcher_inotify.cpp:248
#12 0xb604fda2 in QThreadPrivate::start (arg=0x8d59ed0) at thread/qthread_unix.cpp:320
#13 0xb5a8ee99 in start_thread (arg=0xae062b70) at pthread_create.c:304
#14 0xb5b7273e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130

Thread 1 (Thread 0xb4e96710 (LWP 25222)):
[KCrash Handler]
#7  0xb61586d4 in QMetaObject::changeGuard (ptr=0x8c8f2a0, o=0x0) at kernel/qobject.cpp:471
#8  0xb6842c23 in operator= (this=0x8c8f100, action=0x8f2ebc8, action_e=QAction::Trigger, self=true) at ../../include/QtCore/../../src/corelib/kernel/qpointer.h:68
#9  QMenuPrivate::activateAction (this=0x8c8f100, action=0x8f2ebc8, action_e=QAction::Trigger, self=true) at widgets/qmenu.cpp:1098
#10 0xb6843a8e in QMenu::mouseReleaseEvent (this=0x8f42d18, e=0xbf82f424) at widgets/qmenu.cpp:2306
#11 0xb7286cf4 in KMenu::mouseReleaseEvent (this=0x8f42d18, e=0xbf82f424) at ../../kdeui/widgets/kmenu.cpp:458
#12 0xb640713a in QWidget::event (this=0x8f42d18, event=0xbf82f424) at kernel/qwidget.cpp:8259
#13 0xb6843f67 in QMenu::event (this=0x8f42d18, e=0xbf82f424) at widgets/qmenu.cpp:2415
#14 0xb63aed24 in QApplicationPrivate::notify_helper (this=0x89f2c88, receiver=0x8f42d18, e=0xbf82f424) at kernel/qapplication.cpp:4462
#15 0xb63b4201 in QApplication::notify (this=0xbf82fcc0, receiver=0x8f42d18, e=0xbf82f424) at kernel/qapplication.cpp:4023
#16 0xb71a93ca in KApplication::notify (this=0xbf82fcc0, receiver=0x8f42d18, event=0xbf82f424) at ../../kdeui/kernel/kapplication.cpp:311
#17 0xb61440bb in QCoreApplication::notifyInternal (this=0xbf82fcc0, receiver=0x8f42d18, event=0xbf82f424) at kernel/qcoreapplication.cpp:731
#18 0xb63afc3b in sendSpontaneousEvent (receiver=0x8f42d18, event=0xbf82f424, alienWidget=0x0, nativeWidget=0x8f42d18, buttonDown=0xb6cfdc60, lastMouseReceiver=..., spontaneous=true) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#19 QApplicationPrivate::sendMouseEvent (receiver=0x8f42d18, event=0xbf82f424, alienWidget=0x0, nativeWidget=0x8f42d18, buttonDown=0xb6cfdc60, lastMouseReceiver=..., spontaneous=true) at kernel/qapplication.cpp:3120
#20 0xb643b253 in QETWidget::translateMouseEvent (this=0x8f42d18, event=0xbf82f94c) at kernel/qapplication_x11.cpp:4492
#21 0xb64399b5 in QApplication::x11ProcessEvent (this=0xbf82fcc0, event=0xbf82f94c) at kernel/qapplication_x11.cpp:3680
#22 0xb64655f4 in x11EventSourceDispatch (s=0x8a03168, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#23 0xb5324aa8 in g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
#24 0xb5325270 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#25 0xb5325524 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#26 0xb617153c in QEventDispatcherGlib::processEvents (this=0x89b4aa8, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#27 0xb64651e5 in QGuiEventDispatcherGlib::processEvents (this=0x89b4aa8, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#28 0xb6143289 in QEventLoop::processEvents (this=0xbf82fc14, flags=...) at kernel/qeventloop.cpp:149
#29 0xb6143522 in QEventLoop::exec (this=0xbf82fc14, flags=...) at kernel/qeventloop.cpp:201
#30 0xb6147ecc in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1008
#31 0xb63ac8e7 in QApplication::exec () at kernel/qapplication.cpp:3736
#32 0x08355a27 in main (argc=0, argv=0x8e76d70) at ../../../umbrello/umbrello/main.cpp:111

Possible duplicates by query: bug 266978, bug 257768.

Reported using DrKonqi