> - What I was doing when the application crashed: In a class every time I change the type from bool to int in general properties 
The general properties page of a class does not have an options to change a type from bool to int. 
Are your refering to change the type of an attribute, the return type of a operation or the type of a operation parameter. ?

(In reply to Ralf Habacker from comment #1)
> > - What I was doing when the application crashed: In a class every time I change the type from bool to int in general properties 
> The general properties page of a class does not have an options to change a
> type from bool to int. 
> Are your refering to change the type of an attribute, the return type of a
> operation or the type of a operation parameter. ?

I was changing the return type of an operation in a class.

Valgrind output:

==6470== Invalid read of size 8
==6470==    at 0x7FD050D: __dynamic_cast (in /usr/lib64/libstdc++.so.6.0.21)
==6470==    by 0x57784C: ??? (in /usr/bin/umbrello)
==6470==    by 0x557309: ??? (in /usr/bin/umbrello)
==6470==    by 0x7BE8F5F: QMetaObject::activate(QObject*, QMetaObject const*, int, void**) (qobject.cpp:3576)
==6470==    by 0x6967DE: ??? (in /usr/bin/umbrello)
==6470==    by 0x47D97E: ??? (in /usr/bin/umbrello)
==6470==    by 0x4756AD: ??? (in /usr/bin/umbrello)
==6470==    by 0x7BE8F5F: QMetaObject::activate(QObject*, QMetaObject const*, int, void**) (qobject.cpp:3576)
==6470==    by 0x6173AFF: KDialog::slotButtonClicked(int) (in /usr/lib64/libkdeui.so.5.14.10)
==6470==    by 0x617546E: ??? (in /usr/lib64/libkdeui.so.5.14.10)
==6470==    by 0x7BE8F5F: QMetaObject::activate(QObject*, QMetaObject const*, int, void**) (qobject.cpp:3576)
==6470==    by 0x7BF1D5D: QSignalMapper::mapped(int) (moc_qsignalmapper.cpp:114)
==6470==  Address 0x12876730 is 384 bytes inside a block of size 976 free'd
==6470==    at 0x4C2AA2B: operator delete(void*) (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==6470==    by 0x696D9D0: QPainter::end() (in /usr/lib64/libQtGui.so.4.8.7)
==6470==    by 0x696E8A7: QPainter::~QPainter() (in /usr/lib64/libQtGui.so.4.8.7)
==6470==    by 0x6871986: QWidgetPrivate::drawWidget(QPaintDevice*, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) (in /usr/lib64/libQtGui.so.4.8.7)
==6470==    by 0x6872393: QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) (in /usr/lib64/libQtGui.so.4.8.7)
==6470==    by 0x68722A1: QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) (in /usr/lib64/libQtGui.so.4.8.7)
==6470==    by 0x68722A1: QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) (in /usr/lib64/libQtGui.so.4.8.7)
==6470==    by 0x68715B5: QWidgetPrivate::drawWidget(QPaintDevice*, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) (in /usr/lib64/libQtGui.so.4.8.7)
==6470==    by 0x6872393: QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) (in /usr/lib64/libQtGui.so.4.8.7)
==6470==    by 0x68722A1: QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) (in /usr/lib64/libQtGui.so.4.8.7)
==6470==    by 0x68722A1: QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) (in /usr/lib64/libQtGui.so.4.8.7)
==6470==    by 0x68722A1: QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) (in /usr/lib64/libQtGui.so.4.8.7)
==6470== 
==6470== Invalid read of size 8
==6470==    at 0x7FD0510: __dynamic_cast (in /usr/lib64/libstdc++.so.6.0.21)
==6470==    by 0x57784C: ??? (in /usr/bin/umbrello)
==6470==    by 0x557309: ??? (in /usr/bin/umbrello)
==6470==    by 0x7BE8F5F: QMetaObject::activate(QObject*, QMetaObject const*, int, void**) (qobject.cpp:3576)
==6470==    by 0x6967DE: ??? (in /usr/bin/umbrello)
==6470==    by 0x47D97E: ??? (in /usr/bin/umbrello)
==6470==    by 0x4756AD: ??? (in /usr/bin/umbrello)
==6470==    by 0x7BE8F5F: QMetaObject::activate(QObject*, QMetaObject const*, int, void**) (qobject.cpp:3576)
==6470==    by 0x6173AFF: KDialog::slotButtonClicked(int) (in /usr/lib64/libkdeui.so.5.14.10)
==6470==    by 0x617546E: ??? (in /usr/lib64/libkdeui.so.5.14.10)
==6470==    by 0x7BE8F5F: QMetaObject::activate(QObject*, QMetaObject const*, int, void**) (qobject.cpp:3576)
==6470==    by 0x7BF1D5D: QSignalMapper::mapped(int) (moc_qsignalmapper.cpp:114)
==6470==  Address 0xfffffffffffffff0 is not stack'd, malloc'd or (recently) free'd
==6470== 
KCrash: Application 'umbrello' crashing...

(In reply to Challistobugs from comment #0)
> #6 0x00007f0ad6ef5510 in __dynamic_cast () at /usr/lib64/libstdc++.so.6 #7 
Looks like that dynamic_cast crashes, the possible reasons are listed here http://stackoverflow.com/questions/278429/what-could-cause-a-dynamic-cast-to-crash.

> 0x000000000057784d in () #8 0x000000000055730a in ()
This is the location in umbrello. Is it possible to install umbrello debug symbols to get a function name and file line information ?

(In reply to Ralf Habacker from comment #4)
> (In reply to Challistobugs from comment #0)
> > #6 0x00007f0ad6ef5510 in __dynamic_cast () at /usr/lib64/libstdc++.so.6 #7 
> Looks like that dynamic_cast crashes, the possible reasons are listed here
> http://stackoverflow.com/questions/278429/what-could-cause-a-dynamic-cast-to-
> crash.
> 
> > 0x000000000057784d in () #8 0x000000000055730a in ()
> This is the location in umbrello. Is it possible to install umbrello debug
> symbols to get a function name and file line information ?

Application: Umbrello UML Modeller (umbrello), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fb34a20b780 (LWP 1249))]

Thread 2 (Thread 0x7fb3341c3700 (LWP 1257)):
#0  0x00007fb3465e2fbd in poll () at /lib64/libc.so.6
#1  0x00007fb342ec8e94 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007fb342ec8f9c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007fb3470e126e in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7fb32c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:452
#4  0x00007fb3470b13e1 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7fb3341c2e20, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007fb3470b16f5 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7fb3341c2e20, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007fb346faaa59 in QThread::exec() (this=this@entry=0xceae80) at thread/qthread.cpp:538
#7  0x00007fb3470924c3 in QInotifyFileSystemWatcherEngine::run() (this=0xceae80) at io/qfilesystemwatcher_inotify.cpp:265
#8  0x00007fb346fad23c in QThreadPrivate::start(void*) (arg=0xceae80) at thread/qthread_unix.cpp:352
#9  0x00007fb3442e0324 in start_thread () at /lib64/libpthread.so.0
#10 0x00007fb3465eb70d in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7fb34a20b780 (LWP 1249)):
[KCrash Handler]
#6  0x00007fb346c3e510 in __dynamic_cast () at /usr/lib64/libstdc++.so.6
#7  0x000000000057784d in CPPSourceCodeOperation::updateMethodDeclaration() (this=0x137a030) at /usr/src/debug/umbrello-15.04.3/umbrello/codegenerators/cpp/cppsourcecodeoperation.cpp:49
#8  0x000000000055730a in CodeMethodBlock::syncToParent() (this=0x137a038) at /usr/src/debug/umbrello-15.04.3/umbrello/codegenerators/codemethodblock.cpp:173
#9  0x00007fb3470c5f60 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) (sender=sender@entry=0x1259a40, m=m@entry=0x7c5200 <UMLObject::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x0) at kernel/qobject.cpp:3576
#10 0x0000000000727983 in UMLObject::emitModified() (this=0x1259a40) at /usr/src/debug/umbrello-15.04.3/build/umbrello/umlobject.moc:145
#11 0x0000000000727983 in UMLObject::emitModified() (this=this@entry=0x7fb34a20b780) at /usr/src/debug/umbrello-15.04.3/umbrello/umlobject.cpp:351
#12 0x00000000006967df in UMLClassifierListItem::setTypeName(QString const&) (this=0x7fb34a20b780, type=...) at /usr/src/debug/umbrello-15.04.3/umbrello/classifierlistitem.cpp:157
#13 0x000000000047d97f in UMLOperationDialog::apply() (this=0x7ffe6fe9b7e0) at /usr/src/debug/umbrello-15.04.3/umbrello/dialogs/umloperationdialog.cpp:422
#14 0x00000000004756ae in SinglePageDialogBase::slotOk() (this=0x7ffe6fe9b7e0) at /usr/src/debug/umbrello-15.04.3/umbrello/dialogs/singlepagedialogbase.cpp:57
#15 0x00007fb3470c5f60 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) (sender=0x7ffe6fe9b7e0, m=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3576
#16 0x00007fb3489b7b00 in KDialog::slotButtonClicked(int) () at /usr/lib64/libkdeui.so.5
#17 0x00007fb3489b946f in  () at /usr/lib64/libkdeui.so.5
#18 0x00007fb3470c5f60 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) (sender=sender@entry=0x1622590, m=m@entry=0x7fb347414880 <QSignalMapper::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffe6fe9aa10) at kernel/qobject.cpp:3576
#19 0x00007fb3470ced5e in QSignalMapper::mapped(int) (this=this@entry=0x1622590, _t1=4) at .moc/release-shared/moc_qsignalmapper.cpp:114
#20 0x00007fb3470cee64 in QSignalMapper::map(QObject*) (this=0x1622590, sender=0x1929b50) at kernel/qsignalmapper.cpp:266
#21 0x00007fb3470c5f60 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) (sender=0x1929b50, m=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3576
#22 0x00007fb34838d142 in QAbstractButton::clicked(bool) () at /usr/lib64/libQtGui.so.4
#23 0x00007fb3480e50d3 in  () at /usr/lib64/libQtGui.so.4
#24 0x00007fb3480e62c4 in  () at /usr/lib64/libQtGui.so.4
#25 0x00007fb3480e63b4 in QAbstractButton::mouseReleaseEvent(QMouseEvent*) () at /usr/lib64/libQtGui.so.4
#26 0x00007fb347d7cf00 in QWidget::event(QEvent*) () at /usr/lib64/libQtGui.so.4
#27 0x00007fb347d29f1c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQtGui.so.4
#28 0x00007fb347d30b53 in QApplication::notify(QObject*, QEvent*) () at /usr/lib64/libQtGui.so.4
#29 0x00007fb348a5c63a in KApplication::notify(QObject*, QEvent*) () at /usr/lib64/libkdeui.so.5
#30 0x00007fb3470b2a1d in QCoreApplication::notifyInternal(QObject*, QEvent*) (this=0x7ffe6fe9daa0, receiver=0x1929b50, event=0x7ffe6fe9b050) at kernel/qcoreapplication.cpp:955
#31 0x00007fb347d301ed in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) () at /usr/lib64/libQtGui.so.4
#32 0x00007fb347da6942 in  () at /usr/lib64/libQtGui.so.4
#33 0x00007fb347da530d in QApplication::x11ProcessEvent(_XEvent*) () at /usr/lib64/libQtGui.so.4
#34 0x00007fb347dcd882 in  () at /usr/lib64/libQtGui.so.4
#35 0x00007fb342ec8cc7 in g_main_context_dispatch () at /usr/lib64/libglib-2.0.so.0
#36 0x00007fb342ec8ef8 in  () at /usr/lib64/libglib-2.0.so.0
#37 0x00007fb342ec8f9c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#38 0x00007fb3470e124e in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0xc141c0, flags=...) at kernel/qeventdispatcher_glib.cpp:450
#39 0x00007fb347dcd946 in  () at /usr/lib64/libQtGui.so.4
#40 0x00007fb3470b13e1 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7ffe6fe9b790, flags=...) at kernel/qeventloop.cpp:149
#41 0x00007fb3470b16f5 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7ffe6fe9b790, flags=...) at kernel/qeventloop.cpp:204
#42 0x00007fb3481dfbbc in QDialog::exec() () at /usr/lib64/libQtGui.so.4
#43 0x00000000006d2a8b in UMLOperation::showPropertiesDialog(QWidget*) (this=<optimized out>, parent=<optimized out>) at /usr/src/debug/umbrello-15.04.3/umbrello/operation.cpp:424
#44 0x000000000048d0ed in ClassifierListPage::slotDoubleClick(QListWidgetItem*) (this=0x13a84b0, item=0x16b8350) at /usr/src/debug/umbrello-15.04.3/umbrello/dialogs/pages/classifierlistpage.cpp:679
#45 0x00007fb3470c5f60 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) (sender=0x1987ea0, m=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3576
#46 0x00007fb348297b02 in QListWidget::itemDoubleClicked(QListWidgetItem*) () at /usr/lib64/libQtGui.so.4
#47 0x00007fb3470c5f60 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) (sender=0x1987ea0, m=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3576
#48 0x00007fb348234a75 in QAbstractItemView::doubleClicked(QModelIndex const&) () at /usr/lib64/libQtGui.so.4
#49 0x00007fb34823dd66 in QAbstractItemView::mouseDoubleClickEvent(QMouseEvent*) () at /usr/lib64/libQtGui.so.4
#50 0x00007fb347d7d709 in QWidget::event(QEvent*) () at /usr/lib64/libQtGui.so.4
#51 0x00007fb34812696e in QFrame::event(QEvent*) () at /usr/lib64/libQtGui.so.4
#52 0x00007fb34823d8c3 in QAbstractItemView::viewportEvent(QEvent*) () at /usr/lib64/libQtGui.so.4
#53 0x00007fb3470b2b86 in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) (this=<optimized out>, receiver=0x11c92c0, event=0x7ffe6fe9c1e0) at kernel/qcoreapplication.cpp:1065
#54 0x00007fb347d29efc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQtGui.so.4
#55 0x00007fb347d30b53 in QApplication::notify(QObject*, QEvent*) () at /usr/lib64/libQtGui.so.4
#56 0x00007fb348a5c63a in KApplication::notify(QObject*, QEvent*) () at /usr/lib64/libkdeui.so.5
#57 0x00007fb3470b2a1d in QCoreApplication::notifyInternal(QObject*, QEvent*) (this=0x7ffe6fe9daa0, receiver=0x11c92c0, event=0x7ffe6fe9c1e0) at kernel/qcoreapplication.cpp:955
#58 0x00007fb347d301ed in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) () at /usr/lib64/libQtGui.so.4
#59 0x00007fb347da6942 in  () at /usr/lib64/libQtGui.so.4
#60 0x00007fb347da530d in QApplication::x11ProcessEvent(_XEvent*) () at /usr/lib64/libQtGui.so.4
#61 0x00007fb347dcd882 in  () at /usr/lib64/libQtGui.so.4
#62 0x00007fb342ec8cc7 in g_main_context_dispatch () at /usr/lib64/libglib-2.0.so.0
#63 0x00007fb342ec8ef8 in  () at /usr/lib64/libglib-2.0.so.0
#64 0x00007fb342ec8f9c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#65 0x00007fb3470e124e in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0xc141c0, flags=...) at kernel/qeventdispatcher_glib.cpp:450
#66 0x00007fb347dcd946 in  () at /usr/lib64/libQtGui.so.4
#67 0x00007fb3470b13e1 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7ffe6fe9c920, flags=...) at kernel/qeventloop.cpp:149
#68 0x00007fb3470b16f5 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7ffe6fe9c920, flags=...) at kernel/qeventloop.cpp:204
#69 0x00007fb3481dfbbc in QDialog::exec() () at /usr/lib64/libQtGui.so.4
#70 0x000000000046e9ae in MultiPageDialogBase::exec() (this=<optimized out>) at /usr/src/debug/umbrello-15.04.3/umbrello/dialogs/multipagedialogbase.cpp:137
#71 0x000000000066963c in UMLWidget::showPropertiesDialog() (this=0x1256d60) at /usr/src/debug/umbrello-15.04.3/umbrello/widgets/umlwidget.cpp:1143
#72 0x000000000066f3ab in UMLWidget::mouseDoubleClickEvent(QGraphicsSceneMouseEvent*) (this=0x1256d60, event=0x1902960) at /usr/src/debug/umbrello-15.04.3/umbrello/widgets/umlwidget.cpp:602
#73 0x00000000006e6c70 in ToolBarState::mouseDoubleClick(QGraphicsSceneMouseEvent*) (this=0x123b860, ome=0x7ffe6fe9cd20) at /usr/src/debug/umbrello-15.04.3/umbrello/toolbarstate.cpp:156
#74 0x000000000073086b in UMLScene::mouseDoubleClickEvent(QGraphicsSceneMouseEvent*) (this=0x1262130, event=0x7ffe6fe9cd20) at /usr/src/debug/umbrello-15.04.3/umbrello/umlscene.cpp:861
#75 0x00007fb348321da7 in QGraphicsScene::event(QEvent*) () at /usr/lib64/libQtGui.so.4
#76 0x00007fb347d29f1c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQtGui.so.4
#77 0x00007fb347d309ec in QApplication::notify(QObject*, QEvent*) () at /usr/lib64/libQtGui.so.4
#78 0x00007fb348a5c63a in KApplication::notify(QObject*, QEvent*) () at /usr/lib64/libkdeui.so.5
#79 0x00007fb3470b2a1d in QCoreApplication::notifyInternal(QObject*, QEvent*) (this=0x7ffe6fe9daa0, receiver=0x1262130, event=0x7ffe6fe9cd20) at kernel/qcoreapplication.cpp:955
#80 0x00007fb3483386c7 in QGraphicsView::mouseDoubleClickEvent(QMouseEvent*) () at /usr/lib64/libQtGui.so.4
#81 0x00007fb347d7d709 in QWidget::event(QEvent*) () at /usr/lib64/libQtGui.so.4
#82 0x00007fb34812696e in QFrame::event(QEvent*) () at /usr/lib64/libQtGui.so.4
#83 0x00007fb34833978f in QGraphicsView::viewportEvent(QEvent*) () at /usr/lib64/libQtGui.so.4
#84 0x00007fb3470b2b86 in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) (this=<optimized out>, receiver=0x12907c0, event=0x7ffe6fe9d2a0) at kernel/qcoreapplication.cpp:1065
#85 0x00007fb347d29efc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQtGui.so.4
#86 0x00007fb347d30b53 in QApplication::notify(QObject*, QEvent*) () at /usr/lib64/libQtGui.so.4
#87 0x00007fb348a5c63a in KApplication::notify(QObject*, QEvent*) () at /usr/lib64/libkdeui.so.5
#88 0x00007fb3470b2a1d in QCoreApplication::notifyInternal(QObject*, QEvent*) (this=0x7ffe6fe9daa0, receiver=0x12907c0, event=0x7ffe6fe9d2a0) at kernel/qcoreapplication.cpp:955
#89 0x00007fb347d301ed in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) () at /usr/lib64/libQtGui.so.4
#90 0x00007fb347da6942 in  () at /usr/lib64/libQtGui.so.4
#91 0x00007fb347da530d in QApplication::x11ProcessEvent(_XEvent*) () at /usr/lib64/libQtGui.so.4
#92 0x00007fb347dcd882 in  () at /usr/lib64/libQtGui.so.4
#93 0x00007fb342ec8cc7 in g_main_context_dispatch () at /usr/lib64/libglib-2.0.so.0
#94 0x00007fb342ec8ef8 in  () at /usr/lib64/libglib-2.0.so.0
#95 0x00007fb342ec8f9c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#96 0x00007fb3470e124e in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0xc141c0, flags=...) at kernel/qeventdispatcher_glib.cpp:450
#97 0x00007fb347dcd946 in  () at /usr/lib64/libQtGui.so.4
#98 0x00007fb3470b13e1 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7ffe6fe9d9d0, flags=...) at kernel/qeventloop.cpp:149
#99 0x00007fb3470b16f5 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7ffe6fe9d9d0, flags=...) at kernel/qeventloop.cpp:204
#100 0x00007fb3470b6ef9 in QCoreApplication::exec() () at kernel/qcoreapplication.cpp:1227
#101 0x0000000000447d53 in main(int, char**) (argc=<optimized out>, argv=<optimized out>) at /usr/src/debug/umbrello-15.04.3/umbrello/main.cpp:124

(In reply to Challistobugs from comment #5)

> #6  0x00007fb346c3e510 in __dynamic_cast () at /usr/lib64/libstdc++.so.6
> #7  0x000000000057784d in CPPSourceCodeOperation::updateMethodDeclaration()
> (this=0x137a030) at /usr/src/debug/umbrello-15.04.3/umbrello/codegenerators/cpp/
> cppsourcecodeoperation.cpp:49

Thanks. The crash happens using new code generator. A workaround is to disable "Use new codegenerator..." in main page of Umbrello settings.
It would be nice to get a xmi test case to be able to find out the reason for this crash.

(In reply to Challistobugs from comment #2)
> [...]
> I was changing the return type of an operation in a class.

Hmm let's see...

CodeMethodBlock inherits from OwnedCodeBlock,
    class CodeMethodBlock : public OwnedCodeBlock, [...]
and declares
    public slots:
        virtual void syncToParent();
However, the actual "connect" of this syncToParent() is not done in CodeMethodBlock but rather in the parent class OwnedCodeBlock,
    void OwnedCodeBlock::initFields(UMLObject * parent)
    {
        [...]
        connect(m_parentObject, SIGNAL(modified()), this, SLOT(syncToParent()));
    }
The problem is that OwnedCodeBlock::initFields() is called from within the OwnedCodeBlock constructor,
    OwnedCodeBlock::OwnedCodeBlock (UMLObject * parent)
        : QObject (parent)
    {
        setObjectName(QLatin1String("anOwnedCodeBlock"));
        initFields(parent);
    }
which itself is called by the CodeMethodBlock constructor,
    CodeMethodBlock::CodeMethodBlock(ClassifierCodeDocument * doc, UMLObject * parentObj,
                                            const QString & body, const QString & comment)
      : OwnedCodeBlock (parentObj), [...]
which means that the connect() is done on a CodeMethodBlock object which itself is not yet fully constructed: vtbl_ptr not yet initialized, dynamic method dispatch to child class not possible.
By the way, the new code generators had this design error all over the place.
Years ago, I tried to fix the many occurrences of this pattern but gave up at some point.

Git commit 679324f2a0354c463163c4f18f5c2175d175be4b by Ralf Habacker.
Committed on 15/08/2015 at 08:59.
Pushed by habacker into branch 'Applications/15.08'.

Enable unstable new code generators only in master branch because of major design issue.

The reason is mentioned at bug 351103: "... which means that the connect()
is done on a CodeMethodBlock object which itself is not yet fully constructed:
 vtbl_ptr not yet initialized, dynamic method dispatch to child class not possible.
... the new code generators had this design error all over the place."

M  +1    -0    CMakeLists.txt
M  +4    -2    umbrello/dialogs/pages/generaloptionpage.cpp
M  +2    -0    umbrello/uml.cpp

http://commits.kde.org/umbrello/679324f2a0354c463163c4f18f5c2175d175be4b

(In reply to Oliver Kellogg from comment #7)
> (In reply to Challistobugs from comment #2)
> > [...]
> > I was changing the return type of an operation in a class.
> 
> Hmm let's see...
> 
> CodeMethodBlock inherits from OwnedCodeBlock,
>     class CodeMethodBlock : public OwnedCodeBlock, [...]
> and declares
>     public slots:
>         virtual void syncToParent();
> However, the actual "connect" of this syncToParent() is not done in
> CodeMethodBlock but rather in the parent class OwnedCodeBlock,
>     void OwnedCodeBlock::initFields(UMLObject * parent)
>     {
>         [...]
>         connect(m_parentObject, SIGNAL(modified()), this,
> SLOT(syncToParent()));
>     }
> The problem is that OwnedCodeBlock::initFields() is called from within the
> OwnedCodeBlock constructor,
>     OwnedCodeBlock::OwnedCodeBlock (UMLObject * parent)
>         : QObject (parent)
>     {
>         setObjectName(QLatin1String("anOwnedCodeBlock"));
>         initFields(parent);
>     }
> which itself is called by the CodeMethodBlock constructor,
>     CodeMethodBlock::CodeMethodBlock(ClassifierCodeDocument * doc, UMLObject
> * parentObj,
>                                             const QString & body, const
> QString & comment)
>       : OwnedCodeBlock (parentObj), [...]
> which means that the connect() is done on a CodeMethodBlock object which
> itself is not yet fully constructed: vtbl_ptr not yet initialized, dynamic
> method dispatch to child class not possible.
> By the way, the new code generators had this design error all over the place.
> Years ago, I tried to fix the many occurrences of this pattern but gave up
> at some point.
Time to switch to templated base codegenerators using http://www.grantlee.org/apidox/ as mentioned by Sandros at umbrello development list ?

Git commit b94ab9061eefe2bc232f21a3b4af3136aed720d6 by Ralf Habacker.
Committed on 19/08/2015 at 14:04.
Pushed by habacker into branch 'Applications/15.08'.

Split out advanced code generator related stuff from class CodeGenerator into new class AdvancedCodeGenerator.

For real code generators, we now have SimpleCodeGenerator and AdvancedCodeGenerator,
which makes it easier to maintain or drop related stuff.

M  +1    -0    umbrello/CMakeLists.txt
A  +121  -0    umbrello/codegenerators/advancedcodegenerator.cpp     [License: GPL (v2+)]
A  +41   -0    umbrello/codegenerators/advancedcodegenerator.h     [License: GPL (v2+)]
M  +0    -110  umbrello/codegenerators/codegenerator.cpp
M  +2    -35   umbrello/codegenerators/codegenerator.h
M  +0    -4    umbrello/codegenerators/codegenfactory.cpp
M  +3    -2    umbrello/codegenerators/cpp/cppcodegenerator.cpp
M  +2    -2    umbrello/codegenerators/cpp/cppcodegenerator.h
M  +2    -1    umbrello/codegenerators/d/dcodegenerator.cpp
M  +2    -2    umbrello/codegenerators/d/dcodegenerator.h
M  +2    -1    umbrello/codegenerators/java/javacodegenerator.cpp
M  +2    -2    umbrello/codegenerators/java/javacodegenerator.h
M  +2    -1    umbrello/codegenerators/ruby/rubycodegenerator.cpp
M  +2    -2    umbrello/codegenerators/ruby/rubycodegenerator.h
M  +0    -12   umbrello/codegenerators/simplecodegenerator.cpp
M  +2    -7    umbrello/codegenerators/simplecodegenerator.h
M  +5    -4    umbrello/uml.cpp

http://commits.kde.org/umbrello/b94ab9061eefe2bc232f21a3b4af3136aed720d6

Git commit 2b0513d7da635849a7446ee54040e6f0f83c0d3a by Ralf Habacker.
Committed on 19/08/2015 at 14:07.
Pushed by habacker into branch 'Applications/15.08'.

Doc cleanup of class SimpleCodeGenerator and CodeGenerator.

M  +14   -37   umbrello/codegenerators/codegenerator.h
M  +6    -0    umbrello/codegenerators/simplecodegenerator.h

http://commits.kde.org/umbrello/2b0513d7da635849a7446ee54040e6f0f83c0d3a

Git commit b1c09fe3968082bfd86e8a590a0fad75b671e1c5 by Ralf Habacker.
Committed on 19/08/2015 at 21:34.
Pushed by habacker into branch 'Applications/15.08'.

Move code generator related files (codeaccessormethod.cpp and classifiercodedocument.cpp) to codegenerator subdirectory.

M  +2    -2    umbrello/CMakeLists.txt
R  +0    -0    umbrello/codegenerators/classifiercodedocument.cpp [from: umbrello/classifiercodedocument.cpp - 100% similarity]
R  +0    -0    umbrello/codegenerators/classifiercodedocument.h [from: umbrello/classifiercodedocument.h - 100% similarity]
R  +0    -0    umbrello/codegenerators/codeaccessormethod.cpp [from: umbrello/codeaccessormethod.cpp - 100% similarity]
R  +0    -0    umbrello/codegenerators/codeaccessormethod.h [from: umbrello/codeaccessormethod.h - 100% similarity]

http://commits.kde.org/umbrello/b1c09fe3968082bfd86e8a590a0fad75b671e1c5

*** Bug 346896 has been marked as a duplicate of this bug. ***

New code generator has been disabled in stable releases to avoid further crash bugs.