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

["Graeme Rocher (JIRA)" <ji...@apache.org>]

Graeme Rocher created GROOVY-7846:
-------------------------------------

             Summary: A trait that defines a static method that uses generic return types throws "BUG! Type is null"
                 Key: GROOVY-7846
                 URL: https://issues.apache.org/jira/browse/GROOVY-7846
             Project: Groovy
          Issue Type: Bug
    Affects Versions: 2.4.6
            Reporter: Graeme Rocher
         Attachments: groovy-trait-generics.zip

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

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

Compilation will fail with:

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



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