[GROOVY-9598] CompileStatic: Runtime error: Access outer class property from static inner in @DelegatesTo

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.4
• Fix Version/s: 4.0.0-alpha-1, 3.0.5
• Component/s: Static compilation
• Environment: openjdk version "1.8.0_242" ; OpenJDK Runtime Environment (Zulu 8.44.0.11-CA-macosx) (build 1.8.0_242-b20) ; OpenJDK 64-Bit Server VM (Zulu 8.44.0.11-CA-macosx) (build 25.242-b20, mixed mode)
• Assignee: Eric Milles
• Reporter: Felix Scheinost
• Created: 18/Jun/20 16:03
• Updated: 24/May/22 18:55
• Resolved: 24/Jun/20 00:23

Description

When trying to access the property of a outer class from a static inner class the code should fail to compile.

It doesn't fail to compile when the access happens from inside a @DelegatesTo Closure.

 

import groovy.transform.CompileStatic

@CompileStatic
class Delegate {
  static void delegate(@DelegatesTo(Delegate) Closure c) {
      c.delegate = new Delegate()
      c()
  }
}

@CompileStatic
class Outer {
  String propertyName

  static class Inner {
    void someFunction() {
      // Moving this here results in a compilation error
      // println(propertyName)
      Delegate.delegate {
        // This causes a GroovyCastException at runtime because the generated code tries to access propertyName as if this were a instance of Outer?
        println(propertyName)
      }
    }
  }
}


new Outer.Inner().someFunction()

Issue Links

• breaks: GROOVY-9825 interface constants from super interfaces lost in some contexts