[GROOVY-11114] Fail to find method reference in case of chain of polymorphic method calls

• Type: Bug
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Component/s: Static Type Checker
• Assignee: Unassigned
• Reporter: Thodoris Sotiropoulos
• Created: 27/Jun/23 12:44
• Updated: 27/Jun/23 12:44

Description

This is probably a regresssion.

I have the following program

import java.util.*;
import java.util.concurrent.*;

class Foo<K, V> {
  V apply(K p) { return null; }
}

class Main {
  static final void test(Foo<Map.Entry<Number, Boolean>, String> p) {

    ConcurrentHashMap.KeySetView<Number, Boolean> x = null;
    ConcurrentHashMap<Number, Boolean> y = x.getMap();
    y.<String>reduceEntries(19, p::apply, null); // works

    x.getMap().<String>reduceEntries(19, p::apply, null); // fails
  }
}

Actual behavior

org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
Main.groovy: 15: Failed to find method 'apply(java.util.Map$Entry<java.lang.Object, java.lang.Object>)' for the type: Foo<java.util.Map$Entry<java.lang.Number, java.lang.Boolean>, java.lang.String> @ line 15, column 42.
   p().<String>reduceEntries(19, p::apply,
                                 ^

1 error

Expected behavior

Compile successfully

Notes

Tested against master