// expect error: duplicate
// spec 4.7.2 (was appendix b.2.15): duplicate case labels are an error
include rt;
void pn(int x) { rt.put_n(x); rt.put_c(10); }
fn main() { int k = 1; switch (k) { case 1: pn(1); case 1: pn(2); } return 0; }
// zc0: skip