[GROOVY-4619] problem compiling @Delegate to an interface that extends another interface

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.7.4, 1.7.5, 1.8-beta-3
• Fix Version/s: 1.7.7, 1.8-beta-4
• Component/s: Compiler
• Assignee: Paul King
• Reporter: Jeff Brown
• Created: 05/Jan/11 14:10
• Updated: 08/Feb/11 23:25
• Resolved: 02/Feb/11 06:30

Description

The following code compiles with 1.7.3 but fails with 1.7.4, 1.7.5 and 1.8.0-beta-3.

SomeInterface.groovy

interface SomeInterface {
    void doSomething()
}

SomeOtherInterface.groovy

interface SomeOtherInterface extends SomeInterface {}

SomeClass.groovy

class SomeClass {
    @Delegate
    SomeOtherInterface someOtherInterface
}

Compiling with 1.7.3:

 $ groovy -version
Groovy Version: 1.7.3 JVM: 1.6.0_22
 $ groovyc SomeClass.groovy 
 $ 

Compiling with 1.7.4:

 $ groovy -version
Groovy Version: 1.7.4 JVM: 1.6.0_22
 $ groovyc SomeClass.groovy 
org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
SomeClass.groovy: 1: Can't have an abstract method in a non-abstract class. The class 'SomeClass' must be declared abstract or the method 'void doSomething()' must be implemented.
 @ line 1, column 1.
   class SomeClass {
   ^

1 error

 $ 

Compiling with 1.7.5:

 $ groovy -version
Groovy Version: 1.7.5 JVM: 1.6.0_22
 $ groovyc SomeClass.groovy 
org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
SomeClass.groovy: 1: Can't have an abstract method in a non-abstract class. The class 'SomeClass' must be declared abstract or the method 'void doSomething()' must be implemented.
 @ line 1, column 1.
   class SomeClass {
   ^

1 error

 $ 

Compiling with 1.8.0-beta-3:

 $ groovy -version
Groovy Version: 1.8.0-beta-3 JVM: 1.6.0_22
 $ groovyc SomeClass.groovy 
org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
SomeClass.groovy: 1: Can't have an abstract method in a non-abstract class. The class 'SomeClass' must be declared abstract or the method 'void doSomething()' must be implemented.
 @ line 1, column 1.
   class SomeClass {
   ^

1 error

 $ 

This may be related to GROOVY-4163.