[GROOVY-11385] reference to the constructor of an abstract class is not detected

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 5.0.0-alpha-8
• Fix Version/s: 3.0.22, 5.0.0-alpha-9, 4.0.22
• Component/s: Static Type Checker

Language

groovy

• Assignee: Eric Milles
• Reporter: Thodoris Sotiropoulos
• Created: 25/May/24 13:05
• Updated: 20/Jun/24 22:02
• Resolved: 20/Jun/24 20:04

Description

I have the following program

import java.util.function.*;

abstract class Foo {
  Foo(String x) {}
}

class Test {
  public static void main(String[] args) {
    Function<String, Foo> x = Foo::new;
    x.apply("d");
  }
} 

Actual behavior

The program compiles but I get the following runtime exception, because I call the constructor of an abstract class.

Exception in thread "main" java.lang.InstantiationException: Foo
        at java.base/jdk.internal.misc.Unsafe.allocateInstance(Native Method)
        at java.base/java.lang.invoke.DirectMethodHandle.allocateInstance(DirectMethodHandle.java:501)
        at org.codehaus.groovy.vmplugin.v8.IndyInterface.fromCache(IndyInterface.java:336)
        at Test.ctorRef$main$0(test.groovy)
        at Test.main(test.groovy:10)
 

Expected behavior

The program should have been rejected instead.