//ww:run-exit 81
package main;
type holder = struct { tag: i64, xs: []i64 };
fn dup(p: *[]i64, q: *[]holder, i: i64) void = {
	append(*p, (*q)[i].xs...);
};
export fn main() i32 = {
	let inner: []i64 = [];
	append(inner, 5);
	append(inner, 9);
	let ys: []i64 = [];
	let hs: []holder = [];
	append(hs, holder { tag = 1, xs = inner });
	dup(&ys, &hs, 0);
	if (len(ys) != 2) { return 1; };
	if (ys[0] != 5 || ys[1] != 9) { return 2; };
	return 81;
};