[GROOVY-11319] Access to a private property of a parent object is not caught

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 5.0.0-alpha-8, 4.0.21
• Component/s: Static Type Checker
• Assignee: Eric Milles
• Reporter: Thodoris Sotiropoulos
• Created: 22/Feb/24 08:31
• Updated: 07/May/24 16:16
• Resolved: 06/Apr/24 00:21

Description

I have the following ill-typed program

class A {
  private int getX() {
    return 1;
  }
}

class B extends A {
  void test() {
    def y = super.x;
    System.out.println(y);
  }
}

public class Test {
    public static void main(String[] args) {
      new B().test();
    }
}

Actual behavior

The program compiles. When I run it, I receive:

Exception in thread "main" groovy.lang.MissingPropertyException: No such property: x for class: B
        at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.unwrap(ScriptBytecodeAdapter.java:68)
        at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.getPropertyOnSuper(ScriptBytecodeAdapter.java:426)
        at B.test(test.groovy:9)
        at Test.main(test.groovy:16)

Expected behavior

The problem is on line 9, when the program accesses the private property x of the parent object.

Tested against master (commit: e17149013c5943ad3493f9597e6720eb6529d120)

Issue Links

• is related to: GROOVY-6097 Using super.propertyName gives a MissingMethodException when the property is a boolean and uses the "isPropertyName" naming convention.
• is related to: GROOVY-8999 Access to private fields and methods from subclass exhibits strange behavior
• is related to: GROOVY-9851 Private field and method use from subclass is inconsistent
• relates to: GROOVY-11223 STC: error message for inaccessible setter is not too helpful
• relates to: GROOVY-11356 STC: missing property error for implicit-this reference to private super field or method