Application: umbrello (2.21.0)
KDE Platform Version: 4.14.27
Qt Version: 4.8.7
Operating System: Linux 4.8.13-1-default x86_64
Distribution: "openSUSE Tumbleweed"

-- Information about the crash:
- What I was doing when the application crashed:
After recent KDE-Upgrade shipped by Tumbleweed-Repository opening of some xmi-Files crashes Umbrello. 
- Distribution: openSUSE Tumbleweed
- Plasma-Version: 5.8.4
- Frameworks: 5.29.0
- Qt-Version: 5.7.0
- Platform: x86_64

The crash can be reproduced every time.

-- Backtrace:
Application: Umbrello UML-Modeller (umbrello), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[KCrash Handler]
#6  0x00007f991b7abf4d in __dynamic_cast () from /usr/lib64/libstdc++.so.6
#7  0x0000000000672031 in UMLObject::asUMLClassifier (this=<optimized out>) at /usr/src/debug/umbrello-16.12.0/umbrello/umlmodel/umlobject.cpp:1236
#8  0x0000000000650409 in UMLClassifierListItem::getType (this=<optimized out>) at /usr/src/debug/umbrello-16.12.0/umbrello/umlmodel/classifierlistitem.cpp:103
#9  0x0000000000643aab in UMLAttribute::toString (this=0x1de3f50, sig=<optimized out>) at /usr/src/debug/umbrello-16.12.0/umbrello/umlmodel/attribute.cpp:156
#10 0x0000000000662e18 in UMLOperation::toString (this=0x1dee110, sig=<optimized out>) at /usr/src/debug/umbrello-16.12.0/umbrello/umlmodel/operation.cpp:222
#11 0x000000000047fd38 in UMLListView::childObjectAdded (this=this@entry=0x1c56a50, child=0x1dee110, parent=parent@entry=0x1dedf40) at /usr/src/debug/umbrello-16.12.0/umbrello/umllistview.cpp:1123
#12 0x00000000004842a6 in UMLListView::childObjectAdded (parent=0x1dedf40, child=<optimized out>, this=0x1c56a50) at /usr/include/QtCore/qstring.h:880
#13 UMLListView::slotObjectCreated (this=0x1c56a50, object=0x1dedf40) at /usr/src/debug/umbrello-16.12.0/umbrello/umllistview.cpp:999
#14 0x00000000004c1ce4 in UMLListView::qt_static_metacall (_o=0x1c56a50, _id=<optimized out>, _a=<optimized out>, _c=<optimized out>) at /usr/src/debug/umbrello-16.12.0/build/umbrello/libumbrello_automoc.dir/moc_umllistview_V5RUMLZDPYHAEE.cpp:86
#15 0x00007f991bc455d0 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib64/libQtCore.so.4
#16 0x00000000004c3ba0 in UMLDoc::sigObjectCreated (this=<optimized out>, _t1=<optimized out>) at /usr/src/debug/umbrello-16.12.0/build/umbrello/libumbrello_automoc.dir/moc_umldoc_LCFDOSB3MYDPPC.cpp:166
#17 0x0000000000673730 in UMLObject::resolveRef (this=this@entry=0x1dedf40) at /usr/src/debug/umbrello-16.12.0/umbrello/umlmodel/umlobject.cpp:741
#18 0x000000000066f3f7 in UMLCanvasObject::resolveRef (this=this@entry=0x1dedf40) at /usr/src/debug/umbrello-16.12.0/umbrello/umlmodel/umlcanvasobject.cpp:453
#19 0x00000000006699c7 in UMLPackage::resolveRef (this=0x1dedf40) at /usr/src/debug/umbrello-16.12.0/umbrello/umlmodel/package.cpp:383
#20 0x000000000064ecf0 in UMLClassifier::resolveRef (this=0x1dedf40) at /usr/src/debug/umbrello-16.12.0/umbrello/umlmodel/classifier.cpp:689
#21 0x0000000000669a4f in UMLPackage::resolveRef (this=0x1df5e30) at /usr/src/debug/umbrello-16.12.0/umbrello/umlmodel/package.cpp:387
#22 0x0000000000669a4f in UMLPackage::resolveRef (this=0x1df1060) at /usr/src/debug/umbrello-16.12.0/umbrello/umlmodel/package.cpp:387
#23 0x0000000000669a4f in UMLPackage::resolveRef (this=0x19319a0) at /usr/src/debug/umbrello-16.12.0/umbrello/umlmodel/package.cpp:387
#24 0x0000000000466ba4 in UMLDoc::resolveTypes (this=this@entry=0x184ea50) at /usr/src/debug/umbrello-16.12.0/umbrello/umldoc.cpp:2500
#25 0x000000000046ecb8 in UMLDoc::resolveTypes (this=0x184ea50) at /usr/src/debug/umbrello-16.12.0/umbrello/umldoc.cpp:1984
#26 UMLDoc::loadExtensionsFromXMI (this=this@entry=0x184ea50, node=...) at /usr/src/debug/umbrello-16.12.0/umbrello/umldoc.cpp:2805
#27 0x0000000000475d5b in UMLDoc::loadFromXMI (this=0x184ea50, file=..., encode=<optimized out>) at /usr/src/debug/umbrello-16.12.0/umbrello/umldoc.cpp:2343
#28 0x0000000000478182 in UMLDoc::openDocument (this=0x184ea50, url=..., format=format@entry=0x0) at /usr/src/debug/umbrello-16.12.0/umbrello/umldoc.cpp:715
#29 0x000000000045a149 in UMLApp::slotFileOpenRecent (this=0x16e04b0, url=...) at /usr/src/debug/umbrello-16.12.0/umbrello/uml.cpp:1384
#30 0x00007f991bc455d0 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib64/libQtCore.so.4
#31 0x00007f991fc09f62 in KRecentFilesAction::urlSelected(KUrl const&) () from /usr/lib64/libkdeui.so.5
#32 0x00007f991fc0a02b in ?? () from /usr/lib64/libkdeui.so.5
#33 0x00007f991bc455d0 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib64/libQtCore.so.4
#34 0x00007f991fc0e03f in KSelectAction::triggered(QAction*) () from /usr/lib64/libkdeui.so.5
#35 0x00007f991fc0e244 in KSelectAction::actionTriggered(QAction*) () from /usr/lib64/libkdeui.so.5
#36 0x00007f991bc455d0 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib64/libQtCore.so.4
#37 0x00007f991c16db1f in QActionGroup::triggered(QAction*) () from /usr/lib64/libQtGui.so.4
#38 0x00007f991c16dbcf in ?? () from /usr/lib64/libQtGui.so.4
#39 0x00007f991bc455d0 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib64/libQtCore.so.4
#40 0x00007f991c16b212 in QAction::triggered(bool) () from /usr/lib64/libQtGui.so.4
#41 0x00007f991c16c573 in QAction::activate(QAction::ActionEvent) () from /usr/lib64/libQtGui.so.4
#42 0x00007f991c5c7c1d in ?? () from /usr/lib64/libQtGui.so.4
#43 0x00007f991c5cc089 in ?? () from /usr/lib64/libQtGui.so.4
#44 0x00007f991fdb4db3 in KMenu::mouseReleaseEvent(QMouseEvent*) () from /usr/lib64/libkdeui.so.5
#45 0x00007f991c1c7940 in QWidget::event(QEvent*) () from /usr/lib64/libQtGui.so.4
#46 0x00007f991c5d02db in QMenu::event(QEvent*) () from /usr/lib64/libQtGui.so.4
#47 0x00007f991c1710ec in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#48 0x00007f991c179767 in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#49 0x00007f991fceb67a in KApplication::notify(QObject*, QEvent*) () from /usr/lib64/libkdeui.so.5
#50 0x00007f991bc312cd in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib64/libQtCore.so.4
#51 0x00007f991c17778b in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) () from /usr/lib64/libQtGui.so.4
#52 0x00007f991c1f273d in ?? () from /usr/lib64/libQtGui.so.4
#53 0x00007f991c1f0e6c in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib64/libQtGui.so.4
#54 0x00007f991c219ce2 in ?? () from /usr/lib64/libQtGui.so.4
#55 0x00007f991631e677 in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#56 0x00007f991631e8e0 in ?? () from /usr/lib64/libglib-2.0.so.0
#57 0x00007f991631e98c in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#58 0x00007f991bc6182e in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#59 0x00007f991c219db6 in ?? () from /usr/lib64/libQtGui.so.4
#60 0x00007f991bc2fb9f in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#61 0x00007f991bc2ff05 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#62 0x00007f991bc35af9 in QCoreApplication::exec() () from /usr/lib64/libQtCore.so.4
#63 0x000000000043b7ec in main (argc=<optimized out>, argv=<optimized out>) at /usr/src/debug/umbrello-16.12.0/umbrello/main.cpp:246

Reported using DrKonqi