//ww:run-exit 76
package main;
type cap = struct { s: size, e: size };
type th = struct { pc: size, rc: cap, m: bool };
fn pick(r: *[]cap, q: *[]th, i: size) void = {
	append(*r, (*q)[i].rc);
};
export fn main() i32 = {
	let ts: []th = [];
	append(ts, th { pc = 1, rc = cap { s = 5, e = 9 }, ... });
	let rs: []cap = [];
	pick(&rs, &ts, 0);
	if (len(rs) != 1) { return 1; };
	if (rs[0].s != 5) { return 2; };
	if (rs[0].e != 9) { return 3; };
	return 76;
};