//ww:run-exit 128
package main;
type capture = struct { content: str, start: size, start_bytesize: size, end: size, end_bytesize: size };
type thr = struct { pc: size, caps: []capture };
export fn main() i32 = {
	let cs: []capture = [];
	append(cs, capture { content = "a", start = 1: size, start_bytesize = 1: size, end = 1: size, end_bytesize = 1: size });
	append(cs, capture { content = "b", start = 2: size, start_bytesize = 2: size, end = 2: size, end_bytesize = 2: size });
	let ts: []thr = []; append(ts, thr { pc = 5: size, caps = cs }); let tsp = &ts;
	(*tsp)[0].caps[1] = capture { content = "grp", start = 3: size, start_bytesize = 4: size, end = 60: size, end_bytesize = 61: size };
	if (ts[0].caps[0].start != 1) { return 250; };
	return (ts[0].caps[1].start + ts[0].caps[1].start_bytesize + ts[0].caps[1].end + ts[0].caps[1].end_bytesize): i32;
};