GNU bug report logs - #39805
describe-variable fails to print some circular list values

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From: No Wayman <iarchivedmywholelife <at> gmail.com>
To: Noam Postavsky <npostavs <at> gmail.com>
Cc: 39805 <at> debbugs.gnu.org, No Wayman <iarchivedmywholelife <at> gmail.com>
Subject: bug#39805: 28.0.50; scan-sexps (scan_lists) incorrectly parsing circular list
Date: Thu, 27 Feb 2020 23:01:41 -0500

> Mostly yes, but IMO it's kind of over-engineered.  I would do 
> just:
>
>     (defun workaround/describe-variable-print-bug 
>     (original-function &rest args)
>       "Put temp buffer in emacs-lisp-mode before `pp-buffer'.
>     https://debbugs.gnu.org/39805#8"
>       (advice-add #'pp-buffer :before #'emacs-lisp-mode)
>       (unwind-protect
>         (apply original-function args)
>         (advice-remove #'pp-buffer #'emacs-lisp-mode)))
>
>     (when (= emacs-major-version 26) ;; Work around Bug#39805.
>       (advice-add #'describe-variable :around
>               #'workaround/describe-variable-print-bug))

I assumed mine was doing a more than it needed to.
Thanks again for the patch and the workaround.

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