GNU bug report logs - #42931
27.1; json-pretty-print-buffer on ~2MB line causes core dump

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Package: emacs;

Reported by: Phil Sainty <psainty <at> orcon.net.nz>

Date: Wed, 19 Aug 2020 13:52:02 UTC

Severity: normal

Found in version 27.1

Done: Paul Eggert <eggert <at> cs.ucla.edu>

Bug is archived. No further changes may be made.

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From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: psainty <at> orcon.net.nz, 42931 <at> debbugs.gnu.org
Subject: bug#42931: 27.1; json-pretty-print-buffer on ~2MB line causes core dump
Date: Thu, 20 Aug 2020 15:22:31 +0200

Eli Zaretskii <eliz <at> gnu.org> writes:

> looks like stack overflow?  I guess the recursive nature of compareseq
> is got to cause this at some point?

Yup.

I'm not sure what to do about it, though.  One easy way to "fix this"
would be to not use replace-region-contents in json-pretty-print if the
region is very large...  but that's kinda just wallpapering over the
problem.

replace-region-contents itself could decide to not do all its fancy
stuff if the region is very large, and just replace the contents in the
normal way instead?

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no
This bug report was last modified 4 years and 268 days ago.

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