GNU bug report logs - #7746
SERIOUS BUG: mail-strip-quoted-names bug causing unrmail to lose mail

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Glenn Morris <rgm <at> gnu.org>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#7746: closed (SERIOUS BUG: mail-strip-quoted-names bug
 causing unrmail to lose mail)
Date: Sun, 02 Jan 2011 02:37:02 +0000

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

Your message dated Sat, 01 Jan 2011 21:43:59 -0500
with message-id <ler5cwja8g.fsf <at> fencepost.gnu.org>
and subject line Re: bug#7746: SERIOUS BUG: mail-strip-quoted-names bug causing unrmail to lose mail
has caused the GNU bug report #7746,
regarding SERIOUS BUG: mail-strip-quoted-names bug causing unrmail to lose mail
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)


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[Message part 2 (message/rfc822, inline)]

From: Mark Lillibridge <mark.lillibridge <at> hp.com>
To: bug-gnu-emacs <at> gnu.org
Subject: SERIOUS BUG: mail-strip-quoted-names bug causing unrmail to lose mail
Date: Mon, 27 Dec 2010 16:17:20 -0800

mail-strip-quoted-names in mail/mail-utils.el (at least version 23.1
onwards) contains the following code:

mail-utils.el:187:
	   (with-current-buffer (get-buffer-create " *temp*")
	     (erase-buffer)
	     ...
	     (erase-buffer))

This code erases the buffer " *temp*" even if it is being used by
another piece of code!  This is particularly bad because this is the
first buffer used by with-temp-buffer.

A simple fix is to switch to using with-temp-buffer, which always
creates and destroys a new buffer (patch at end):

	   (with-temp-buffer
	      ...
	      )


    This bug breaks unrmail badly, causing it to discard all messages
after one containing a from line that causes that block of code to be
executed (roughly, from lines that contain nested comments).  This is
because unrmail loads the file to be converted into a buffer created
with with-temp-buffer, which is in turn erased prematurely by
mail-strip-quoted-names.  [There is a longer discussion about this on
the developers mailing list.]

    As this bug causes the permanent loss of e-mail, it should probably
be fixed posthaste, including in version 23.

- Mark

ts-rhel5 [158]% diff mail-utils.el new-mail-utils.el
187,188c187
<          (with-current-buffer (get-buffer-create " *temp*")
<            (erase-buffer)
---
>          (with-temp-buffer
201,202c200
<            (setq address (buffer-string))
<            (erase-buffer))
---
>            (setq address (buffer-string)))

[Message part 3 (message/rfc822, inline)]

From: Glenn Morris <rgm <at> gnu.org>
To: 7746-done <at> debbugs.gnu.org
Subject: Re: bug#7746: SERIOUS BUG: mail-strip-quoted-names bug causing
	unrmail to lose mail
Date: Sat, 01 Jan 2011 21:43:59 -0500

Version: 23.3

Thanks; applied.

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