//ww:run-exit 7
// Migrated from 700_e2e row 66.
package main;
fn lookup(p: *i32, b: bool) (*i32 | void) = {
  if (b) { return p; };
  return;
};
fn use_arg(r: (*i32 | void)) i32 = {
  match (r) {
    case let q: *i32 => return *q;
    case void => return 99;
  };
  return 0;
};
fn main() i32 = {
  let x: i32 = 42;
  let ok: i32 = use_arg(lookup(&x, true));
  let no: i32 = use_arg(lookup(&x, false));
  if (ok != 42) { return 1; };
  if (no != 99) { return 2; };
  return 7;
};