How to reproduce:
Open MITK Diffusion
Close Current Perspective (or) Close All Perspectives
Click on View Navigator Button >> CRASH
First Analysis:
It is a segfault in the function
QmitkExtWorkbenchWindowAdvisorHack::onViewNavigator()
and the call
[1057] berry::IViewPart::Pointer viewnavigatorView = berry::PlatformUI::GetWorkbench()->GetActiveWorkbenchWindow()->GetActivePage()->FindView("org.mitk.views.viewnavigatorview");