Morbus was last seen in #drupal 1 day 8 hours ago saying ''.

Since the first day Lampoon#jquery couldn't tell what the user said last time. All of a sudden sometimes it would work.

After debugging today, it turned out that bot_seen_all_nicks_for_regexp() was quoting symbols in nicks for regex before separating out the first letter of the nick.

So for some nicks it turned out to be like:

/**
 * Return an array of all current nicks.
 */
function bot_seen_all_nicks_for_regexp() {
  ...
      $nick_name = preg_quote($nick_name, '/');
      $nick_name = preg_replace('/^(.)(.*)/', '(\1)(\2)', $nick_name);
      $nicks[] = '/\b' . $nick_name . '\b/i';
  ...
}

Converts [domon] int /\b(\)([domon\])\b/i rather than, /\b(\[)(domon\])\b/i. See the (\) becoming the block in the first example, which should rather contain escaped [.

The fix is just to reverse the quote and replace lines, so we first separate out the nicks, then quote to escape the chars:

/**
 * Return an array of all current nicks.
 */
function bot_seen_all_nicks_for_regexp() {
  ...
      $nick_name = preg_replace('/^(.)(.*)/', '(\1)(\2)', $nick_name);
      $nick_name = preg_quote($nick_name, '/');
      $nicks[] = '/\b' . $nick_name . '\b/i';
  ...
}