When running under a JRE a NullPointerException was thrown and that wasn't too helpful for users.
Now it's an IllegalStateException telling you to use a JDK because JRE's don't come with a compiler.

Thanks to IwoTens in #1 for this release.

Now JitPack won't complain about Java9+ source version in the pom

The real question is, how can I get JitPack to support this release? It doesn't take kindly to Java9+