Anonymous classes are in some cases detected but never removed

[marcphilipp]

package a;

public class AnonymousClassBug {

    Runnable a = new Runnable() {
        @Override
        public void run() {
            methodInsideAnonymousClass();
        }

        private void methodInsideAnonymousClass() {
        }
    };
}

The above class results in the following class graph:

Uncommenting the call to methodInsideAnonymousClass results in:

Removing the corresponding project from the set of Usus projects will not remove the anonymous class:

Looks like anonymous classes are detected accidentally when they call methods on themselves.

[marcphilipp]

#32 might be related to this issue.