@UtilicyClass performs differently in java8 and java11 (and above)

[taes-k]

Short description

@UtilicyClass makes methods and inner class modifiers to static.
but Inner class modification function does not work properly in java 11 and above.

example case)

@UtilityClass
public class UtilClazz
{
  public static void method()
  {
     InnerClazz obj = new InnerClazz(); 
  }
  private class InnerClazz
  {
  }
}

it's works well in Java8 but when we use project sdk as java11 it occurs error

non-static variable this cannot be referenced from a static context

But when I delombok or open in the class file, it modified well as a static class.
so I think it's not a lombobk dependency's bug but plugin's bug

Expected behavior

it could be works well in java11 likes java8

Version information

• IDEA Version: 2020.3.2
• JDK Version: 1.8.0_282 / 11.0.11
• OS Type & Version: mac / catalina
• Lombok Plugin Version: 203.7148.57
• **Lombok Dependency Version:**1.18.20

[liblit]

See also projectlombok/lombok#3097, which finds the same problem using direct javac compilation: no IDE, no plugin, just the Java compiler.