//ww:run-exit 83
package main;
type holder = struct { tag: i64, xs: []i64 };
export fn main() i32 = {
	let big: []i64 = [];
	let i: i64 = 0;
	for (i < 40) { append(big, i); i += 1; };
	let hs: []holder = [];
	append(hs, holder { tag = 2, xs = big });
	let dst: []i64 = [];
	append(dst, 100);
	append(dst, hs[0].xs...);
	if (len(dst) != 41) { return 1; };
	if (dst[0] != 100 || dst[1] != 0 || dst[40] != 39) { return 2; };
	return 83;
};