[GROOVY-6147] CompileStatic: dispatch bug with overloaded method when last argument is an array and there is an separate method without the last array argument

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.1.4
• Component/s: Static compilation
• Assignee: Cédric Champeau
• Reporter: Lari Hotari
• Created: 07/May/13 11:04
• Updated: 01/Jun/13 06:11
• Resolved: 27/May/13 09:06

Description

There is a dispatch bug in CompileStatic with overloaded method when last argument is an array and there is an separate method without the last array argument.

Example of such method signatures:

List<MetaMethod> respondsTo(Object obj, String name, Object[] argTypes);
List<MetaMethod> respondsTo(Object obj, String name);

This example demonstrates the bug:

class Hello {
   def hello() {
      "Hello"
   }

   def hello(String name) {
      "Hello $name"
   }
}

class DispatchBug {
   def e=new Hello()
   
   @groovy.transform.CompileStatic
   def demo() {
      def d=new Hello()
      println org.codehaus.groovy.runtime.InvokerHelper.getMetaClass(d).respondsTo(d, "hello")
      
      println org.codehaus.groovy.runtime.InvokerHelper.getMetaClass(e).respondsTo(e, "hello")
   }
   
   def demoDynamic() {
      def d=new Hello()
      println org.codehaus.groovy.runtime.InvokerHelper.getMetaClass(d).respondsTo(d, "hello")
      
      println org.codehaus.groovy.runtime.InvokerHelper.getMetaClass(e).respondsTo(e, "hello")
   }
}

def bugdemo=new DispatchBug()

bugdemo.demo()
bugdemo.demoDynamic()

It prints out:

[public java.lang.Object Hello.hello()]
[public java.lang.Object Hello.hello(), public java.lang.Object Hello.hello(java.lang.String)]
[public java.lang.Object Hello.hello(), public java.lang.Object Hello.hello(java.lang.String)]
[public java.lang.Object Hello.hello(), public java.lang.Object Hello.hello(java.lang.String)]