GNU bug report logs - #47168
28.0.50; Infinite recursion in project-root

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Juri Linkov <juri <at> linkov.net>
Subject: bug#47168: closed (Re: bug#47168: 28.0.50; Infinite recursion in
 project-root)
Date: Wed, 17 Mar 2021 16:52:02 +0000

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Your bug report

#47168: 28.0.50; Infinite recursion in project-root

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 47168 <at> debbugs.gnu.org.

-- 
47168: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=47168
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: Dmitry Gutov <dgutov <at> yandex.ru>
To: Stefan Monnier <monnier <at> iro.umontreal.ca>
Cc: Juri Linkov <juri <at> linkov.net>, 47168-done <at> debbugs.gnu.org
Subject: Re: bug#47168: 28.0.50; Infinite recursion in project-root
Date: Wed, 17 Mar 2021 18:51:36 +0200

On 17.03.2021 05:54, Stefan Monnier wrote:
> But we could use some dynamically-scoped
> `project--within-roots-fallback` variable to break such recursion;-)

Good idea, thanks!

Applied and pushed.

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From: Juri Linkov <juri <at> linkov.net>
To: bug-gnu-emacs <at> gnu.org
Subject: 28.0.50; Infinite recursion in project-root
Date: Mon, 15 Mar 2021 19:04:46 +0200

When for some reason the argument of 'project-root' becomes nil,
for example, when the current buffer is not under version control,
then

  (project-root (project-current))

goes into infinite recursion:

Debugger entered--Lisp error: (error "Lisp nesting exceeds ‘max-lisp-eval-depth’")
  project-root(nil)
  project-roots(nil)
  ...
  project-root(nil)
  project-roots(nil)
  ...

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