Hi All, Hope I'm in the right place. The implementation of Jigsaw caused a regression in that Package.getImplementationVersion is unusable if no other version things are defined in the manifest. This appears to be an unintentional regression caused by a missing null check. I have prepared a patch and unit test for review here: https://patch-diff.githubusercontent.com/raw/md-5/OpenJDK/pull/3.patch Note that only testImplVersion fails, but I have included tests for all the version elements for completeness.
NB: Not an OpenJDK dev so can't create webrev or bug report. Thanks Michael
