Build error on JDK8 due to the use of a field only available since Java 9

[moditect]

Build error on JDK8 due to the use of a field only available since Java 9

[beikov]

Also, I just realized, that having JARs with an existing MANIFEST.MF leads to an exception when specifying the jvm version element because the ZipFileSystem reports that META-INF/MANIFEST.MF already exists.

Unfortunately, even though the module-info.class file is now in META-INF, Jandex will still fail to index the JAR, so this feature will not help with that problem.

[gunnarmorling]

Fixed.

[gunnarmorling]

Unfortunately, even though the module-info.class file is now in META-INF, Jandex will still fail to index the JAR, so this feature will not help with that problem.

Yes, that's a known issue. It has been fixed in Jandex some time ago (by simply ignoring all module-info.class files), but I reckon you cannot easily upgrade depending on your environment.