//ww:run-exit 82
package main;
type holder = struct { tag: i64, ss: []str, ns: []i32 };
export fn main() i32 = {
	let h = holder { tag = 1, ss = [], ns = [] };
	append(h.ss, "ab");
	append(h.ss, "cde");
	append(h.ns, 7: i32);
	let hs: []holder = [];
	append(hs, h);
	let ss: []str = [];
	append(ss, hs[0].ss...);
	if (len(ss) != 2) { return 1; };
	if (len(ss[0]) != 2 || ss[0][1] != 'b') { return 2; };
	if (len(ss[1]) != 3 || ss[1][2] != 'e') { return 3; };
	let ns: []i32 = [];
	append(ns, hs[0].ns...);
	if (len(ns) != 1 || ns[0] != 7) { return 4; };
	let empty: []i64 = [];
	let ep = ∅
	let acc: []i64 = [];
	append(acc, (*ep)...);
	if (len(acc) != 0) { return 5; };
	return 82;
};