[236587] Find outdated error messages to delete

createPost(type := "Deletion suggestion", text := hijackPrint(r {
  // collect all tagless replies to each post
  new MultiMap<Long, GazellePost> replyMap;
  for (GazellePost p : getAllPosts())
    for (long id : p.refsWithTag(""))
      replyMap.put(id, p);
  //pnl(replyMap);

  for (long postID, L<GazellePost> replies : replyMap.asMap()) {
    if (empty(replies)) continue;
    //print("BotInfo: " + uniquify(collect botInfo(replies));
    L<GazellePost> botReplies = sortedByCalculatedFieldDesc(p -> p.modifiedOrBumped(), objectsWhereIC(replies, botInfo := "Safe Code Runner");
    for (GazellePost p : dropFirst(botReplies))
      if (startsWith(p.text, "java.lang.RuntimeException:"))
        print("Delete post " + p.id + " because of newer post " + first(botReplies).id);
  }
}))