GNU bug report logs - #46786
28.0.50; pcase-let does not bind variables used inside macro

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Mauricio Collares <mauricio <at> collares.org>
Subject: bug#46786: closed (Re: bug#46786: 28.0.50; pcase-let does not
 bind variables used inside macro)
Date: Tue, 09 Mar 2021 23:58:01 +0000

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Your bug report

#46786: 28.0.50; pcase-let does not bind variables used inside macro

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 46786 <at> debbugs.gnu.org.

-- 
46786: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=46786
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Mauricio Collares <mauricio <at> collares.org>
Cc: 46786-done <at> debbugs.gnu.org, Lars Ingebrigtsen <larsi <at> gnus.org>
Subject: Re: bug#46786: 28.0.50; pcase-let does not bind variables used
 inside macro
Date: Tue, 09 Mar 2021 18:57:11 -0500

> I've just received a report from a user that the fix worked great. Thank
> you very much!

Thanks for confirming, I'm glad you like it,


        Stefan

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From: Mauricio Collares <mauricio <at> collares.org>
To: bug-gnu-emacs <at> gnu.org
Subject: 28.0.50; pcase-let does not bind variables used inside macro
Date: Thu, 25 Feb 2021 21:40:54 -0300

This testcase is a reduced version of a problem that happens in
the "matrix-client.el" package (available on alphapapa's GitHub):

(require 'cl-lib)
(require 'pcase)

(cl-macrolet
    ((message-self () `(message self)))
  (pcase-let ((`(,self ,self2) '("1" "2")))
    (message-self)))

Behavior before commit a218c9861573b5ec4979ff2662f5c0343397e3ff
("lisp/emacs-lisp/pcase.el: Don't bind unused vars in branches"):
outputs 1 to the minibuffer.

Behavior after the commit: Symbol’s value as variable is void: self

Best,
Mauricio

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