In my plugin for a custom language I am able to browse the source of the Plugin SDK. However, setting breakpoints doesn't work and also the line numbers of error messages do not correspond to the source I see. I guess I have to integrate the IDEA-source as a module, but where can I find the correct source files? I'm developing with IntelliJ IDEA 12.1.4 and the Plugin SDK is IDEA-IU-129.1359.
Thanks for any help, Sebastian