Runtime Annotation lost in parent interface when the code is compiled by eclipse

[beanww]

Let's make sure issue is not already fixed in latest builds first.

• [NO ] I verified I can reproduce this issue against latest Integration Build of Eclipse SDK

Steps to reproduce

From a fresh installation and clean workspace:

with eclipse-jee-2024-12-R-win32-x86_64.zip
and plugin: Lombok v1.18.36

I tried Test.java:

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import java.lang.reflect.Method;

public class Test {
	public static void main(String[] args) {
		Method[] methods = ChildInterface.class.getMethods();
		for(Method method: methods) {
			if(method.getName().contains("select")) {
				System.out.println(method.getAnnotations().length);
			}
		}
	}
}
interface ParentInterface<V extends ClassInf>{
	V selectById();
}

interface ChildInterface extends ParentInterface<ImplClass>{
	@anno
	default ImplClass selectById() {
		return null;
	}
}
interface ClassInf{}

class ImplClass implements ClassInf{}

@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
@interface anno{
	
}

Run Test.java

I expected: <what was the expected outcome?>

1
1
which means both 2 methods have annotation object

But got: <what is the actual undesired behavior?>

1
0

I encountered this issue when compiling Test.java with Eclipse: 'The method object with return type ClassInf has no annotation object.'

However, this issue does not occur when I compile Test.java using IntelliJ IDEA or javac.

Tested under this environment:

• OS & version:
• Win10
• Eclipse IDE/Platform version (as shown in Help > About):
• Version: 2024-12 (4.34.0)
• Build id: 20241128-0757
  *JDK:
  jdk-21.0.5

[akurtakov]

This looks like JDT bug . Unfortunately, Github doesn't allow moving issues between organizations so you would have to open a new one in the proper location https://github.com/eclipse-jdt/eclipse.jdt.core .
As there is nothing that can be done by the Eclipse Platform project I'm closing this one.