[GROOVY-9801] Stub generator omits default interface methods

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.6
• Fix Version/s: 5.0.0-alpha-2
• Component/s: Stub generator / Joint compiler
• Assignee: Jochen Theodorou
• Reporter: Christopher Smith
• Created: 30/Oct/20 01:49
• Updated: 22/Dec/23 11:38
• Resolved: 03/Oct/23 18:15

Description

When presented with a Groovy interface that has a default method (shiny and new!) the stub generator omits the "default" part, leading to compilation failures in Java classes due to unimplemented abstract methods.

interface HasDefaultMethod {
  default void method() { }
}

import java.lang.*;
import java.util.*;
import java.io.*;
import java.net.*;
import groovy.lang.*;
import groovy.util.*;

@groovy.transform.Trait() public interface HasDefaultMethod
  {
;
  void method();
}

(The stray semicolon is also odd but doesn't appear to be pathological.)

Issue Links

• is related to: GROOVY-8299 Generate bytecode for interface with default, private and static methods
• links to: GitHub Pull Request #1482
• links to: GitHub Pull Request #1963