(In reply to comment #0)

> -- Backtrace:
> Application: Umbrello UML Modeller (umbrello), signal: Segmentation fault
> [...]
> Thread 1 (Thread 0x7ff392baa880 (LWP 27703)):
> [KCrash Handler]
> #6  0x0000000000abf450 in ?? ()
> #7  0x00000000006a5f10 in UMLAssociation::getObjectId (this=<optimized out>,
> role=Uml::A) at
> /usr/src/debug/kdesdk-4.8.3/umbrello/umbrello/association.cpp:500

I suspect the <UML:Association> was somehow inconsistent in the XMI so that
the role objects (UMLAssociation::m_pRole) did not get constructed.
As said, without a reproducer it's hard to tell.

umbrello/association.cpp
- Do not dereference m_pRole[role] when NULL.
  Might happen on loading corrupted XMI.

CCBUG:300004