//ww:run-exit 7
// Migrated from 700_e2e row 56.
package main;
type invalid  = !i32;
type overflow = !void;
type error    = !(invalid | overflow);
fn errcode(e: error) i32 = {
  match (e) {
    case let v: invalid  => return v: i32;
    case let v: overflow => return 99;
  };
  return 0;
};
fn main() i32 = {
  let e: error = 7: invalid;
  return errcode(e);
};