GNU bug report logs - #42220
27.0.91; Infinte loop in display_count_lines

Previous Next

Full log

Message #8 received at 42220 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Óscar Fuentes <ofv <at> wanadoo.es>
Cc: 42220 <at> debbugs.gnu.org
Subject: Re: bug#42220: 27.0.91; Infinte loop in display_count_lines
Date: Tue, 07 Jul 2020 17:11:11 +0300

> From: Óscar Fuentes <ofv <at> wanadoo.es>
> Date: Mon, 06 Jul 2020 00:25:19 +0200
> 
> 
> When the third-party mini-modeline [1] is active, certain quick and
> repeated sequence of inputs produce a hang as described here [2].
> 
> Attaching gdb to Emacs and stepping through the code it is clear that
> there is an infinite loop:
> 
> 26649         while (start_byte < limit_byte)
> (gdb) p start_byte
> $32 = 557362
> (gdb) p limit_byte
> $33 = 703917
> (gdb) n
> 26651             ceiling =  BUFFER_CEILING_OF (start_byte);
> (gdb) 
> 26652             ceiling = min (limit_byte - 1, ceiling);
> (gdb) p ceiling
> $34 = 557361
> (gdb) n
> 26653             ceiling_addr = BYTE_POS_ADDR (ceiling) + 1;
> (gdb) p ceiling
> $35 = 557361

Thanks, I think I fixed this now on the emacs-27 branch.

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.