GNU bug report logs - #45944
28.0.50; Mailabbrev sometimes hangs

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Package: emacs;

Reported by: Katsumi Yamaoka <yamaoka <at> jpl.org>

Date: Mon, 18 Jan 2021 00:12:01 UTC

Severity: normal

Tags: fixed

Found in version 28.0.50

Fixed in version 28.1

Done: Lars Ingebrigtsen <larsi <at> gnus.org>

Bug is archived. No further changes may be made.

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From: Katsumi Yamaoka <yamaoka <at> jpl.org>
To: schwab <at> linux-m68k.org
Cc: larsi <at> gnus.org, 45944 <at> debbugs.gnu.org
Subject: bug#45944: 28.0.50; Mailabbrev sometimes hangs
Date: Tue, 19 Jan 2021 20:07:36 +0900

Andreas Schwab <schwab <at> linux-m68k.org> wrote:
> On Jan 19 2021, Lars Ingebrigtsen wrote:
>> And I guess there's some extreme backtracking going on with the
>>   \\(\\w\\|[_.]\\)+>
>> part?
> Does `\w' match `_'?

Yes it does.  While the hang arises, syntax table is overridden
temporarily with `mail-abbrev-syntax-table'.

(mail-abbrev-make-syntax-table)
(with-syntax-table mail-abbrev-syntax-table
  (string-match "\\w" "_"))

So, it explains some strange things, doesn't it?  Actually, this
advice looks to solve the problem:

(defadvice message--syntax-propertize (around use-standard-syntax-table
                                              activate)
  "Use standard-syntax-table."
  (with-syntax-table (standard-syntax-table)
    ad-do-it))
This bug report was last modified 4 years and 186 days ago.

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