No error on duplicate parameters on classes and resources

I think that the following is a bug:

class test (

  $a = 'first',

  $a = 'second',

) {

  notice($a)

}

include test

results in:

Notice: Scope(Class[Test]): second

If two parameters with the same name are added to a class or resource an error should be thrown in my opinion. This would also solve the problem, that this looks like it violates the no reassignment rule.