commit d5a7572dc8b388bc98fe43872513d25af24e27f2
author Marco Konersmann <marco.konersmann@paluno.uni-due.de> Fri Jun 30 11:25:52 2017 +0200
committer Daniel Strueber <strueber@mathematik.uni-marburg.de> Sat Aug 12 12:36:52 2017 -0400
tree d538d0586bda389f66d1f984a0cf62c21c1ef8ad
parent 02c32860c3484e9e50fbdc80f0edc11b414be60e

Fixes infinite loop in EGraph.getRoots()

When the graph contains a containment loop, EGraph.getRoots()
ran infinitely. The method now uses
EcoreUtil.getRootContainer(EObject), which throws an
IllegalStateException in this case. The relevant change is in
EGraphImpl.
The other changes are tests to show that the bug is resolved.

Bug: https://bugs.eclipse.org/bugs/show_bug.cgi?id=519013	
Change-Id: Ie9aca0b070f744c5500a295d599cf386943b3d16
Signed-off-by: Marco Konersmann <marco.konersmann@paluno.uni-due.de>