Marc MAZAS

I had one, but did not record it, pointing on the second call to it.next(), denoting the map change due to the put() on it; the proposed and tested fix...

I added a commit to fix erroneous excludes management.

> Do you have a stack trace of the ConcurrentModificationException? You should get one easily with: ``` -nologo:true -nowarn:0414 -utf8output:true -target:exe -out:${project.artifactId}.exe ```