Class implementing a generic interface causes VerifyError

interface Interface<SomeType> {
   public void handle(long a, SomeType x);
}

class InterfaceImpl
implements Interface<String> {
    public void handle(long a, String something) {
        println(something);
    }
}

InterfaceImpl test = new InterfaceImpl()
test.handle(5, "hi");

Caught: java.lang.VerifyError: (class: InterfaceImpl, method: handle signature: (JLjava/lang/Object;)V) Register 2 contains wrong type
        at Test.class$(Test.groovy)
        at Test.$get$$class$InterfaceImpl(Test.groovy)
        at Test.run(Test.groovy:12)