//ww:run-exit 72
package main;
type box = struct { pc: size, matched: bool };
export fn main() i32 = {
	let xs: []i64 = [];
	append(xs, 7);
	append(xs, 8, 9);
	let ys: []i64 = [];
	append(ys, xs...);
	let ss: []str = [];
	append(ss, "hi");
	let ps: []box = [];
	append(ps, box { pc = 1, matched = false });
	if (len(xs) != 3 || xs[2] != 9) { return 1; };
	if (len(ys) != 3 || ys[0] != 7) { return 2; };
	if (len(ss) != 1 || len(ps) != 1) { return 3; };
	return 72;
};