Application: umbrello (2.5.5)
KDE Platform Version: 4.5.5 (KDE 4.5.5)
Qt Version: 4.7.0
Operating System: Linux 2.6.35-32-generic x86_64
Distribution: Ubuntu 10.10

-- Information about the crash:
- What I was doing when the application crashed:
1. open recent file.
2. in logical view in existing package created new class
3. double click on that class to open modal window
4. click OK on that modal window - CRASH

The crash can be reproduced every time.

-- Backtrace:
Application: Umbrello UML Modeller (umbrello), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f3b6efe0760 (LWP 5037))]

Thread 2 (Thread 0x7f3b63110700 (LWP 5038)):
#0  0x00007f3b6ab787f3 in __poll (fds=<value optimized out>, nfds=<value optimized out>, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f3b66687009 in ?? () from /lib/libglib-2.0.so.0
#2  0x00007f3b666877b5 in g_main_loop_run () from /lib/libglib-2.0.so.0
#3  0x00007f3b638473c4 in ?? () from /usr/lib/libgio-2.0.so.0
#4  0x00007f3b666ac7e4 in ?? () from /lib/libglib-2.0.so.0
#5  0x00007f3b6bac5971 in start_thread (arg=<value optimized out>) at pthread_create.c:304
#6  0x00007f3b6ab84f3d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f3b6efe0760 (LWP 5037)):
[KCrash Handler]
#6  0x00007f3b6c16f270 in vtable for QtSharedPointer::ExternalRefCountData () from /usr/lib/libQtCore.so.4
#7  0x0000000000a4cb6a in UMLListView::contentsMouseDoubleClickEvent (this=<value optimized out>, me=<value optimized out>) at ../../../umbrello/umbrello/umllistview.cpp:1324
#8  0x00007f3b6b7311cb in Q3ScrollView::viewportMouseDoubleClickEvent (this=0x23b2810, e=0x7fffafb19030) at widgets/q3scrollview.cpp:1780
#9  0x00007f3b6b732bce in Q3ScrollView::eventFilter (this=0x23b2810, obj=0x23b24b0, e=0x7fffafb19030) at widgets/q3scrollview.cpp:1488
#10 0x00007f3b6b6d74c6 in Q3ListView::eventFilter (this=0x23b2810, o=0x23b24b0, e=0x7fffafb19030) at itemviews/q3listview.cpp:3791
#11 0x00007f3b6be43507 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=<value optimized out>, receiver=0x23b24b0, event=0x7fffafb19030) at kernel/qcoreapplication.cpp:847
#12 0x00007f3b6c32efac in QApplicationPrivate::notify_helper (this=0x2061190, receiver=0x23b24b0, e=0x7fffafb19030) at kernel/qapplication.cpp:4392
#13 0x00007f3b6c33530e in QApplication::notify (this=0x7fffafb19d40, receiver=0x23b24b0, e=0x7fffafb19030) at kernel/qapplication.cpp:3959
#14 0x00007f3b6d7a9586 in KApplication::notify (this=0x7fffafb19d40, receiver=0x23b24b0, event=0x7fffafb19030) at ../../kdeui/kernel/kapplication.cpp:310
#15 0x00007f3b6be43cdc in QCoreApplication::notifyInternal (this=0x7fffafb19d40, receiver=0x23b24b0, event=0x7fffafb19030) at kernel/qcoreapplication.cpp:732
#16 0x00007f3b6c333dbe in sendEvent (receiver=0x23b24b0, event=0x7fffafb19030, alienWidget=0x23b24b0, nativeWidget=0x23b02d0, buttonDown=<value optimized out>, lastMouseReceiver=<value optimized out>, spontaneous=true) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#17 QApplicationPrivate::sendMouseEvent (receiver=0x23b24b0, event=0x7fffafb19030, alienWidget=0x23b24b0, nativeWidget=0x23b02d0, buttonDown=<value optimized out>, lastMouseReceiver=<value optimized out>, spontaneous=true) at kernel/qapplication.cpp:3058
#18 0x00007f3b6c3b7345 in QETWidget::translateMouseEvent (this=0x23b02d0, event=<value optimized out>) at kernel/qapplication_x11.cpp:4403
#19 0x00007f3b6c3b5c5c in QApplication::x11ProcessEvent (this=<value optimized out>, event=0x7fffafb19950) at kernel/qapplication_x11.cpp:3536
#20 0x00007f3b6c3e20e2 in x11EventSourceDispatch (s=0x2064fc0, callback=<value optimized out>, user_data=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:146
#21 0x00007f3b66683342 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#22 0x00007f3b666872a8 in ?? () from /lib/libglib-2.0.so.0
#23 0x00007f3b6668745c in g_main_context_iteration () from /lib/libglib-2.0.so.0
#24 0x00007f3b6be70193 in QEventDispatcherGlib::processEvents (this=0x2039410, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:415
#25 0x00007f3b6c3e1a4e in QGuiEventDispatcherGlib::processEvents (this=0x277d9d0, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#26 0x00007f3b6be42a02 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#27 0x00007f3b6be42dec in QEventLoop::exec (this=0x7fffafb19c80, flags=) at kernel/qeventloop.cpp:201
#28 0x00007f3b6be46ebb in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1009
#29 0x00000000009fd595 in main (argc=<value optimized out>, argv=<value optimized out>) at ../../../umbrello/umbrello/main.cpp:111

Reported using DrKonqi