GNU bug report logs - #39075
28.0.50; Emacs hangs on 100% CPU and grows beyond bounds in shell-mode

Previous Next

Full log

View this message in rfc822 format

From: Pieter van Oostrum <pieter-l <at> vanoostrum.org>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 39075 <at> debbugs.gnu.org
Subject: bug#39075: 28.0.50; Emacs hangs on 100% CPU and grows beyond bounds in shell-mode
Date: Sun, 12 Jan 2020 18:11:22 +0100

[Message part 1 (text/plain, inline)]

Eli Zaretskii <eliz <at> gnu.org> writes:

>> Date: Fri, 10 Jan 2020 22:16:58 +0100
>> From: Pieter van Oostrum <pieter <at> vanoostrum.org>
>> 
>> 1) Emacs -Q
>> 2) M-x shell
>> 3) type some command, and use some filename completions on the way
>> (using TAB).
>> 4) Type a semicolon (;)
>> 
>> Now Emacs hangs, the ; does not appear, and it doesn't react to a C-g typed.
>> It uses 100% CPU and memory grows beyond bounds, eventually just making
>> my whole computer unresponsive.
>
> I cannot reproduce this on GNU/Linux, so it's probably macOS-specific.

It's not so clear what could be MacOS-specific.

I ran it under gdb, and interrupted it several times with C-z in gdb. Most of the stack traces were in the garbage collector, suggesting that it is collecting like crazy. This doesn't surprise me, as it is constantly allocating new memory. The rest of this stack trace doesn't have useful information.

I managed to get a stack trace where it is processing. I haven't analysed these yet, but I include both here.

[semicolon-emacs-loop (application/octet-stream, attachment)]

[Message part 3 (text/plain, inline)]

-- 
Pieter van Oostrum
www: http://pieter.vanoostrum.org/
PGP key: [8DAE142BE17999C4]

Previous Next

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