GNU bug report logs - #31236
[PATCH] Fix pre- and post-command-hook errors in term.el

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Karl Otness <karl <at> karlotness.com>
Subject: bug#31236: closed (Re: bug#31236: [PATCH] Fix pre- and
 post-command-hook errors in term.el)
Date: Sun, 22 Apr 2018 17:10:02 +0000

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Your bug report

#31236: [PATCH] Fix pre- and post-command-hook errors in term.el

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 31236 <at> debbugs.gnu.org.

-- 
31236: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=31236
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: Eli Zaretskii <eliz <at> gnu.org>
To: Phil Sainty <psainty <at> orcon.net.nz>
Cc: 31236-done <at> debbugs.gnu.org, karl <at> karlotness.com
Subject: Re: bug#31236: [PATCH] Fix pre- and post-command-hook errors in
 term.el
Date: Sun, 22 Apr 2018 20:09:22 +0300

> Date: Sun, 22 Apr 2018 23:48:38 +1200
> From: Phil Sainty <psainty <at> orcon.net.nz>
> Cc: bug-gnu-emacs <bug-gnu-emacs-bounces+psainty=orcon.net.nz <at> gnu.org>,
> 	31236 <at> debbugs.gnu.org
> 
> Bug and proposed fix confirmed and tested here.
> 
> This was an oversight on my part from #24837.
> 
> The suggested patch seems sensible to me.  If others agree, I think
> this should be committed to the emacs-26 branch.

Pushed, thanks.

Karl, in the future please include a commit log message according to
the instructions in CONTRIBUTE.  (I fixed that for you this time.)

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From: Karl Otness <karl <at> karlotness.com>
To: bug-gnu-emacs <at> gnu.org
Subject: [PATCH] Fix pre- and post-command-hook errors in term.el
Date: Sat, 21 Apr 2018 23:41:51 -0400

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As far as I can tell there isn't an existing bug report for this
issue. It is very minor but I have attached a fix. This affects Emacs
26.1-rc1 `term' and `ansi-term'. In char mode term installs functions
in both pre- and post-command-hooks. After the process exits both of
these hooks produce errors and then are removed by Emacs after
printing a message.

Both of these hooks are re-installed when entering char mode and
removing them if they are not present will do nothing. To produce this
change, I took the remove-hook lines used when entering line mode and
placed them in `term-handle-exit'.

To reproduce the issue in 26.1, M-x term, exit the running process and
execute any command (i.e. move point). In *Messages* there should be
the following lines:

Error in pre-command-hook (term-set-goto-process-mark):
(wrong-type-argument processp nil)
Error in post-command-hook (term-goto-process-mark-maybe):
(wrong-type-argument processp nil)

The error seems to come up from `process-mark'. After this change,
these errors no longer appear as the hooks are removed. I have
attached a patch which applies this change to current master.

Thank you,
Karl

[0001-Fix-pre-and-post-command-hook-errors-in-term.el.patch (text/x-patch, attachment)]

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