GNU bug report logs - #23917
25.0.95; commit 3a9d6296b35e5317c497674d5725eb52699bd3b8 causing org-capture to error out

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From: Eli Zaretskii <eliz <at> gnu.org>
To: Alex Bennée <alex.bennee <at> linaro.org>
Cc: 23917 <at> debbugs.gnu.org, rpluim <at> gmail.com, nljlistbox2 <at> gmail.com, monnier <at> iro.umontreal.ca, jwiegley <at> gmail.com
Subject: bug#23917: [O] bug#23917: Please consider making Bug #23917 a blocker for 25.1 (was Re: org-capture: Capture template ‘g’: Match data clobbered by buffer modification hooks)
Date: Tue, 19 Jul 2016 21:44:19 +0300

> From: Alex Bennée <alex.bennee <at> linaro.org>
> Cc: monnier <at> iro.umontreal.ca, 23917 <at> debbugs.gnu.org, rpluim <at> gmail.com, jwiegley <at> gmail.com, nljlistbox2 <at> gmail.com, me <at> lunaryorn.com
> Date: Tue, 19 Jul 2016 18:45:44 +0100
> 
>   ;; Save and restore the match data, as recommended in (elisp)Change Hooks
>   (save-match-data
>     (when flycheck-mode
>       ;; The buffer was changed, thus clear the idle timer
>       (flycheck-clear-idle-change-timer)
>       (if (string-match-p (rx "\n") (buffer-substring beg end))
>           (flycheck-buffer-automatically 'new-line 'force-deferred)
>         (setq flycheck-idle-change-timer
>               (run-at-time flycheck-idle-change-delay nil
>                            #'flycheck-handle-idle-change))))))
> 
> However it doesn't look as though it tweaks the buffer until idle timer
> has run. Weird....

Tweaking the buffer is not what causes the problem.  It's the call to
save-match-data itself.  It doesn't matter at all what the code inside
save-match-data does.

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