Subject: bug#61514: 30.0.50; sadistically long xml line hangs emacs

From: Gregory Heytings <[email-masked]>
Date: Tue, 21 Feb 2023 15:44:57 +0000

>>> See my reply to Stefan.  With a 'with-restriction' of 10000 chars, the 
>>> file opens in 1.6 seconds.  I'm not sure it would make sense to add a 
>>> variable/defcustom there instead of the (admittedly somewhat 
>>> arbitrary) constant 10000, which should be large enough in practice.
>> 
>> OK, then let's go with that version.
>
> OK, thanks.  Stefan, do you have any further comments/objections on that 
> version?
>

By the way, I noted that a variant of the regexp still produces stack 
overflows:

(with-current-buffer (get-buffer-create "*bug*")
   (erase-buffer)
   (insert (make-string 266665 ?x) "=")
   (goto-char (point-min))
   (looking-at "[^y]*=*"))

266665 overflows, 266664 does not.  Is that expected?