[GROOVY-11106] Failed to detect an ambiguous method call?

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Information Provided
• Component/s: Static Type Checker
• Labels: overloading
• Assignee: Unassigned
• Reporter: Thodoris Sotiropoulos
• Created: 20/Jun/23 13:17
• Updated: 15/Dec/23 19:52
• Resolved: 15/Dec/23 19:51

Description

I have the following code:

import java.io.*;
import java.util.*;


class Main {
  void test() {
    ObjectOutputStream y = null;
    m(y); 
  }

  Number m(OutputStream x) { return 1; }
  Number m(DataOutput x) { return 2; }
}

Actual behaviour

The code compiles successfully. The compiler resolves the second method, that is m(DataOutput).

Expected behaviour

It seems that the method call is ambiguous, and thus the compiler should have rejected the above program. javac seems to reject the program with a method ambiguity error.