[GROOVY-11002] Unexpected type mismatch when having overloaded methods with variable arguments

• Type: Bug
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Component/s: Static Type Checker
• Assignee: Unassigned
• Reporter: Thodoris Sotiropoulos
• Created: 07/Apr/23 13:04
• Updated: 13/Jun/23 18:50

Description

I have the following program

import java.util.function.Supplier;

class Main {
  static final void test() {
    Main.<String>m(() -> "df", "fdaf");
  }

  static <T> void m(Supplier<T> x, T... y) {}
  static <T extends Comparable<? extends T>> void m(T...y) {}
}

Actual behavior

org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
test.groovy: 5: [Static type checking] - Cannot return value of type java.lang.String for lambda expecting int
 @ line 5, column 26.
       Main.<String>m(() -> "df", "fdaf");
                            ^

1 error

Expected behavior

Compile successfully

Notes

Tested against master (commit: a4e0d6de9cc2d8ecb48b48df501e63ec1735d837)

Test case adapted from:

class Main {
  static final void test() {
    org.apache.commons.lang3.ObjectUtils.<String>median((stills, impeaches) ->   86 , "fdaf");
  }
}

Issue Links

• relates to: GROOVY-11094 SAM types not working well along with overloading