//ww:error "not a variant"
// 944_variant_chain_b95 isas_unrel_reject: `is ta` on (void | tb) where ta,tb
// are same-shape but distinct names — is/as acceptance is nominal-exact (#107).
// BOTH stages reject.
package main;
type ta = struct { a: int, b: int };
type tb = struct { a: int, b: int };
fn f(v: (void | tb)) i32 = {
	if (v is ta) { return 1; };
	return 0;
};
export fn main() i32 = { return 0; };