GNU bug report logs - #23949
25.0.95; Regression in handling error caused by (string-match-p "." nil)

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From: Eli Zaretskii <eliz <at> gnu.org>
To: Kaushal Modi <kaushal.modi <at> gmail.com>
Cc: schwab <at> suse.de, 23949 <at> debbugs.gnu.org, monnier <at> iro.umontreal.ca
Subject: bug#23949: 25.0.95; Regression in handling error caused by (string-match-p "." nil)
Date: Wed, 13 Jul 2016 18:03:07 +0300

> From: Kaushal Modi <kaushal.modi <at> gmail.com>
> Date: Wed, 13 Jul 2016 13:10:46 +0000
> Cc: Eli Zaretskii <eliz <at> gnu.org>, schwab <at> suse.de, 23949 <at> debbugs.gnu.org
> 
> So what is the way forward?

I just proposed one way forward.

> Certainly there was a lower level change after emacs 24.5 that changed the behavior of how the run-hooks
> behave or how the advices are executed in general or when called within a debugger? 

The underlying program with binding inhibit-changing-match-data when
help-function-arglist is called exists on the emacs-25 branch as
well.  It also exists in Emacs 24.5, except that there
help-split-fundoc signals an error, instead of returning bogus data:

  (let ((inhibit-changing-match-data t))
    (help-split-fundoc (documentation 'delete-file) nil))
    => error->Args out of range: 3004

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