[GROOVY-5729] Delegation to an interface with deprecated methods shows a compile error

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.8.6
• Fix Version/s: 2.0.5, 2.1.0-beta-1, 1.8.9
• Component/s: Compiler
• Environment: Max OS X 10.6.8, Mac Java, Eclipse 3.7
• Assignee: Paul King
• Reporter: Paul Bennett
• Created: 28/Sep/12 07:36
• Updated: 04/Oct/12 17:02
• Resolved: 30/Sep/12 02:15

Description

Given an interface:

public
interface DeprecatedMethods {

    @Deprecated
    public void setHeight(float height);

}

and a delegating class:

class DelegateDeprecated {
	
    @Delegate	
    private DeprecatedMethods delegate
	
}

then the compiler shows a compilation error:

$ groovyc DelegateDeprecated.groovy
org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
DelegateDeprecated.groovy: 15: Can't have an abstract method in a non-abstract class. The class 'DelegateDeprecated' must be declared abstract or the method 'void setHeight(float)' must be implemented.
@ line 15, column 1.
class DelegateDeprecated {
^

1 error

This happens from the command line and Eclipse, and can be made to go away by removing the @Deprecated annotation.