message: fix strange rust resolve error
diff: @@ -168,7 +168,8 @@ mod tests {
  fn copies() {
  let x = Ent(2);
  let some: PackedOption<Ent> = x.into();
  - assert_eq!(some.expand(), x.into());
  + let some2: Option<Ent> = x.into();
  + assert_eq!(some.expand(), some2);
  assert_eq!(some, x.into());
  }
  }
  