super-constructor-call does not work for var args constructors

I have attached a test case demonstrating this bug:

class First declares a Constructor with var args string parameter
class Second inherits this and declares a new constructor, which super-calls the var-args constructor with two strings (should work, since the original constructor can be called with two strings).
however, the super-call throws a class cast exception because at some point groovy tries to cast one of the Strings to a String array, which of course is not possible.