Curried MethodClosure with default parameters wont work

class Foo {
   static fooWithDefaults( String a1, String a2, String a3 = a2, Map a4 = [:] ) { /*stuff*/ }
   static decorate( Class klass ) {
      klass.metaclass.foo = this.&fooWithDefaults.curry("A")
   }
}

def f = new Foo()
f.foo("B") // throws MME
f.foo("B","C",[:]) // works

class Foo {
   static fooWithDefaults( String a1, String a2, String a3 = a2, Map a4 = [:] ) { /*stuff*/ }
   static decorate( Class klass ) {
      klass.metaClass.foo = { String a2, String a3 = a2, Map a4 = [:] ->
         Foo.fooWithDefaults("A",a2,a3,a4)
      }
   }
}