//ww:error "source alias chain reaches >=2 variants"
// 944_variant_chain_b95 chain_amb_loud: source base reaches both ali and ali2
// (chain) — ambiguous without nominal layout (#95). BOTH stages loud-stop.
package main;
type base = struct { a: int, b: int };
type ali = base;
type ali2 = ali;
export fn main() i32 = {
	let s: base;
	s.a = 4; s.b = 9;
	let v: (ali | ali2) = s;
	if (v is ali) { return 1; };
	if (v is ali2) { return 2; };
	return 3;
};