[GROOVY-10930] STC accepts program although constructor reference is invalid

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 5.0.0-alpha-1
• Component/s: Static Type Checker
• Assignee: Eric Milles
• Reporter: Thodoris Sotiropoulos
• Created: 10/Feb/23 10:46
• Updated: 23/Aug/23 09:11
• Resolved: 15/Feb/23 16:59

Description

I have the following program

import java.util.function.*;

class Bar {}

public class Test {

    public static void main(String[] args) {
      m(Bar::new);
    }

    static <X> void m(Function<String, X> d) {
      d.apply("dfa")
    }
}

Actual behavior

The compiler accepts the program, but notice that the constructor reference is invalid. So, at runtime, we get:

Exception in thread "main" groovy.lang.GroovyRuntimeException: Could not find matching constructor for: Bar(String)
        at groovy.lang.MetaClassImpl.invokeConstructor(MetaClassImpl.java:1908)
        at groovy.lang.MetaClassImpl.invokeConstructor(MetaClassImpl.java:1677)
        at org.codehaus.groovy.vmplugin.v8.IndyInterface.fromCache(IndyInterface.java:321)
        at Test.ctorRef$main$0(test.groovy)
        at Test.m(test.groovy:13)
        at Test.main(test.groovy:9)

Expected behavior

The compiler should have rejected this example program.

Tested against master (commit: 2c40df2827b8d1bc941bd6ebdc386b3f9bc3bf3b)

Issue Links

• relates to: GROOVY-10971 STC is looking for the wrong constructor reference