[cogre] cogre-uml-quick-class fails with "eieio-oref: eieio-oref called on a class: srecode-template-inserter-section-end"

Hi,

I'm trying to generate a UML diagram from source code. When running cogre-uml-
quick-class it fails with "Layout engine failed. You need to install 
Graphviz."

Removing the condition-case around (cogre-layout) results in "eieio-oref: 
eieio-oref called on a class: srecode-template-inserter-section-end"

I'm running emacs from git (25.0.50.1) and cedet from git.

Could this be related to the swich to eioeio shipped with emacs?

Hints, tips and suggestions are welcome :)

Thanks,
Daniel

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