Hi,

I have different gradle plugin projects, which are dependend from each other. They are built with gradle and published via gradle maven-publish plugin. If I open the groovy file from jar in my project and want to add a breakpoint to a valid line, this does not work. With IntelliJ it is working for my scenario, so I think it is an eclipse bug and not a bug in maven-publish plugin.
I have uploaded a small github project to extract this behaviour.
To reproduce do the following:

• Download project from https://github.com/moley/eclipseGroovyDebug
• step into subproject groovylib and call ./gradlew publishToMavenLocal
• a version of the groovylib should be available in ~/.m2/repository/groovylib
• open subproject groovyapp by "File->Import...->Existing Gradle Project" or call ./gradlew eclipse on this project and open via "File->Import...->Existing projects into workspace"
• Open the dialog "Open Type" and search for "SomeLibClass"
• Try to add breakpoint -> nothing happens

Does not work for version 3.0.0.xx-201803261849-e47 of Eclipse Groovy Development Tools in Oxygen and does not work with Photon either