Broken Diffview Labels After Reset To Previouse State

[thomcz]

After restoring previouse of a diagram by selecting "reset to previouse state" all labels (in the Diffview) starting from that state until the commit history beginning are broken and showing null values.

[thomcz]

The error makes itself felt in the ComparsionManager in getResourceCDOId (178). The RootElement of the given SyntaxModel can't be resolved. A proxy is all you get at this point. The reset to a previouse state is happening in ResetToPreviousStateCommand.