Possible bug - should the following code cause an access violation exception?

[Afshin]

module test;

class Foo {
    public static ulong next = 0;

    public static ulong getNext() {
        return next++;
    }
}

void main() {
    Foo.getNext();
}

/*
The next++ is the culprit.
Using a ++next does not throw an exception.
*/