[GROOVY-9606] Traits using generics generate incorrect stub for Methods

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.5.6
• Fix Version/s: 4.0.0-alpha-1, 3.0.5, 2.5.13
• Component/s: Stub generator / Joint compiler
• Assignee: Paul King
• Reporter: Keegan Witt
• Created: 24/Jun/20 09:28
• Updated: 23/Jul/20 14:16
• Resolved: 25/Jun/20 02:55

Description

trait SomeGroovyTrait<D> {
    List<D> list(D arg) {
        [arg]
    }
}

class SomeGroovyClass implements SomeGroovyTrait<String> { }

Generates a stub like this

...
public class SomeGroovyClass implements SomeGroovyTrait<java.lang.String>, groovy.lang.GroovyObject {
    ...
    public  java.util.List<D> list(D arg) { return (java.util.List<D>)null;}    // <== D should be String
}

Note that the return type and parameter types use D instead of type String and the generic reference isn't declared in the class either.

Issue Links

• is a clone of: GROOVY-9031 Traits using generics generate incorrect stub for Properties