In the diff tool reverting a remove change by click on the class leads to a DNU

[Ducasse]

While reverting on clicking on methods is working.

Scenario.

• I move methods that where extended in a package to the defining class
• So I got method x is removed method x is added
• Then I thought that it is not a good idea so I clicked on the changed in the class in the extending package and did revert.
• I obtained a debugger.