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

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Package: emacs;

Reported by: Kaushal Modi <kaushal.modi <at> gmail.com>

Date: Mon, 11 Jul 2016 20:13:02 UTC

Severity: normal

Tags: fixed

Merged with 16294, 24166

Found in versions 25.0.95, 24.3.50

Fixed in version 26.1

Done: npostavs <at> users.sourceforge.net

Bug is archived. No further changes may be made.

Full log

Message #50 received at 23949 <at> debbugs.gnu.org (full text, mbox):

From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Kaushal Modi <kaushal.modi <at> gmail.com>
Cc: schwab <at> suse.de, Eli Zaretskii <eliz <at> gnu.org>, 23949 <at> debbugs.gnu.org
Subject: Re: 25.0.95;
 Regression in handling error caused by (string-match-p "." nil)
Date: Tue, 12 Jul 2016 16:27:03 -0400

> Correct, but that error does not show up within emacs. All the user sees is:
> Entering debugger...
> help-function-arglist: End of file during parsing

Clearly, the problem is that string-match-p uses
"(let ((inhibit-changing-match-data t))", so the debugger is run with
inhibit-changing-match-data bound to t and that breaks lots of
Elisp code.

That's a general problem with the use dynamic binding to pass extra
parameters: you end up passing them not just to that one function but
also to all other functions called from that one.


        Stefan
This bug report was last modified 8 years and 168 days ago.

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