[GROOVY-7846] A trait that defines a static method that uses generic return types throws "BUG! Type is null"

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.4.6
• Fix Version/s: 2.4.7
• Assignee: Paul King
• Reporter: Graeme Rocher
• Created: 25/May/16 12:48
• Updated: 12/Jun/16 08:45
• Resolved: 31/May/16 04:53

Description

If you have a trait that defines a method such as:

    static <T> T withClient(MyTrait myTrait, @DelegatesTo(MyTrait) Closure<T> callable ) {
        // no-op
    }

Compilation will fail with:

BUG! Type is null. Most probably you let a transform reuse existing ClassNodes with generics information, that is now used in a wrong context.

Issue Links

• links to: GitHub Pull Request #340