Description Peter Lunk 2016-03-09 09:42:55 EST

In case of master detail binding (list of pattern matches, and a form that displays match details), as the details are being updated the following exception is thrown:

org.eclipse.core.runtime.AssertionFailedException: assertion failed: Cannot change value type in a nested observable value, from org.eclipse.emf.ecore.impl.EAttributeImpl to class java.lang.Object

the cause of this problem is that the getValueType() method of the MatcherProperty class returns Object type.

A quick fix can be applied that returns null instead of the Object type, however in the long run, the getValue method should receive a proper implementation.