namespace;
include rt;

// expect: r: used after it was given away; r borrows t, and t was freed on line 9 (t declared on line 8)
// an extern declares its borrow return by parameter position.
extern char* strchr(char*, int) borrows 0;
fn main() {
	char* t = rt.new(4); t[0] = 'x'; t[1] = 0;
	let r = strchr(t, 'x'); rt.free(t); rt.put_c(r[0]);
	return 0;
}