Grails 3 Plugin classes not resolved in main Grails application - import not working (red in IDE). Works fine in Grails/Gradle command line.

First, have to say IntelliJ 15 is awesome! Issue: Using Grails Version: 3.1.0.RC1 and using either "ideaIU-15.0.2-custom-jdk-bundled.dmg" or "ideaIU-143.1559.1-custom-jdk-bundled.dmg", if you create a multi-project with a plugin and a main Grails app, the IDE fails to resolve classes in the plug-in imported by the main app. Closely following a demo by Graeme Rocher ([http://www.infoq.com/presentations/grails-3-x-inside](http://www.infoq.com/presentations/grails-3-x-inside)) I created a groovy trait in the plugin as mail.sender.MailSender and under the main Grails app "myapp", in a Controller, tried to import mail.sender.MailSender. The import won't resolve: "Groovyc unable to resolve class mail.sender.MailSender". The import is shown as red in the source page. I will attach the simple project (with build dir removed). Sorry if I missed something obvious. In the Grails 3 command shell, and with "gradle test", it resolves fine and tests pass; not so in the IntelliJ IDE. Thanks!

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*Imported from [IDEA-149830](https://youtrack.jetbrains.com/issue/IDEA-149830) · Type: Bug · Votes: 2*
*Comments, attachments, dates and reporter are not part of the export — follow the link above for the full history.*

Reproduce the multi-project setup described for Grails 3.1.0.RC1 in IntelliJ IDEA 15, with a plugin defining mail.sender.MailSender and the main app importing it. Compare IDE resolution with the working Grails command shell and gradle test; done means the import is no longer red and Groovyc resolves the plugin class in the IDE.

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