message: Fixes Use session.fatal() instead of assert!
diff: @@ -225,11 +225,10 @@ enum BuilderKind<'a> {
  .arg(self.config.dst)
  .status()
  .expect("Couldn't run ranlib");
  - assert!(
  - status.success(),
  - "Ranlib exited with code {:?}",
  - status.code()
  - );
  +
  + if !status.success() {
  + self.config.sess.fatal(&format!("Ranlib exited with code {:?}", status.code()));
  + }
  }
  }
  