[GROOVY-3560] IllegalArgumentException with interface typed varargs

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.6.3
• Fix Version/s: 1.6.4, 1.7-beta-1
• Assignee: Roshan Dawrani
• Reporter: Damien Ferrand
• Created: 29/May/09 18:28
• Updated: 15/Oct/09 17:16
• Resolved: 30/May/09 13:45

Description

If you define a java method with an interface typed varargs parameter and call this method with at least two different subclasses from groovy, you get an IllegalArgumentException.

Here is the interface:

Ifc.java

public interface Ifc {}

the two classes:

ClsA.java

public class ClsA implements Ifc{}

ClsB.java

public class ClsB implements Ifc{}

the method with varargs:

public class TestJava {
public static void meth(Ifc...ifcs){
	System.out.println(ifcs.length);
}
}

the call:

TestJava.meth(new ClsA(),new ClsB())

Works from java but throws an IllegalArgumentException from groovy.

Interestingly, if Ifc is a class, everything works as expected.