Groovy parser fails to parse constructor declarations

[sambsnyd]

I haven't categorized exactly why this fails to parse yet in a way that is fully distinct from other issues, but this code should parse and instead throws an exception:

class Pair {
    String foo
    String bar
    Pair(String foo, String bar) {
        this.foo = foo
        this.bar = bar
    }
}

class A {
    def foo(List l) {
        l.add(new Pair("foo", "bar"))
        l.add(new Pair("foo", "bar"))
        l.add(new Pair("foo", "bar"))
        l.add(new Pair("foo", "bar"))
    }
}

Reproduced in test CompilationUnitTest.addingToMaps()