[GROOVY-7288] @Delegate to object by Class which implementing trait with fields complains 'abstract method in a non-abstract class'

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.3.6
• Fix Version/s: 3.0.11, 4.0.2
• Component/s: Compiler
• Labels: trait traits
• Assignee: Eric Milles
• Reporter: Pavel Alexeev
• Created: 03/Feb/15 17:07
• Updated: 23/Jul/22 16:18
• Resolved: 21/Mar/22 00:44

Description

Please look at short reproduce:

import groovy.transform.TupleConstructor

trait Some{
    String STATIC = 'static data' // Commenting it out make it work (it have no difference static it or not)

    String so(){
        println ('STATIC=' + STATIC)
    }
}

class Delegator implements Some{
    String delegated(){
        println 'delegated work'
    }
}

class SomeClass{
    @Delegate Delegator delegator = new Delegator();
}

def s = new SomeClass()
s.delegated()

Running it I have:

2 compilation errors:

Can't have an abstract method in a non-abstract class. The class 'SomeClass' must be declared abstract or the method 'java.lang.String Some__STATIC$get()' must be implemented.
 at line: 17, column: 1

Can't have an abstract method in a non-abstract class. The class 'SomeClass' must be declared abstract or the method 'void Some__STATIC$set(java.lang.String)' must be implemented.
 at line: 17, column: 1