Same problem as #120: The source code and javadoc for groovy JDK code is not available in the Editor and Eclipse is asking to attach a sources file.

Now it seems the groovy-all-x.y.z-sources.jar is excluded from the compiler plugins due to #198:
bin.excludes = lib/*-sources.jar
(e.g. in build.properties )

Also see GroovyClasspathContainer.java where the sources jar is referenced if found.

Is there a reason for this exclusion?