The following code fails to compile:

---
class Foo {
        public Foo() {
                stdout.printf("Hello World\n");
        }
}

Foo a,b,c;

void main() {
        a = new Foo();
        b = new Foo();
        c = new Foo();
}
---

But defining a,b,c inside the main() function or as in multiple rows works:

Foo a; Foo b; Foo c;