groovy

fixed with the combined ideas of grame and myself background: an inputstream was opened multiple times during compilation at different places where getInputStream was called. One such place was there to just close the stream, but closing the stream was already done at SourceUnit, so it was pointless to close the stream there and even opened a new stream.

I will close the issue as fixed again, because no one seemed to be interested in this anymore and without a testcase there is not really something I can do.