GNU bug report logs - #77550
Regression in macroexpand from a4ec9ca (April 1)

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Ship Mints <shipmints <at> gmail.com>
Subject: bug#77550: closed (Re: bug#77550: Regression in macroexpand from
 a4ec9ca (April 1))
Date: Sat, 05 Apr 2025 23:33:02 +0000

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Your bug report

#77550: Regression in macroexpand from a4ec9ca (April 1)

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 77550 <at> debbugs.gnu.org.

-- 
77550: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=77550
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: Sean Whitton <spwhitton <at> spwhitton.name>
To: Ship Mints <shipmints <at> gmail.com>, Alan Mackenzie <acm <at> muc.de>
Cc: Daniel Mendler <mail <at> daniel-mendler.de>, 77550-done <at> debbugs.gnu.org
Subject: Re: bug#77550: Regression in macroexpand from a4ec9ca (April 1)
Date: Sun, 06 Apr 2025 07:32:15 +0800

Hello,

Thanks to Alan for the fix -- installed.

-- 
Sean Whitton

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From: Ship Mints <shipmints <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Cc: Daniel Mendler <mail <at> daniel-mendler.de>
Subject: Regression in macroexpand from a4ec9ca (April 1)
Date: Sat, 5 Apr 2025 09:23:41 -0400

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Below found in the wild expanding a macro from Daniel's marginalia package.

Emacs 30
(macroexpand-all '(foo bar)) -> (foo bar)
(macroexpand-all '((foo) bar)) -> ((foo) bar)

master
(macroexpand-all '(foo bar)) -> (foo bar)
(macroexpand-all '((foo) bar)) -> signals an error

Debugger entered--Lisp error: (wrong-type-argument symbolp (foo))
  signal(wrong-type-argument (symbolp (foo)))
  function-get((foo) compiler-macro)

Whether this is an intended or unintended consequence, I can't say, not
being a macro expert.

-Stephane (and Daniel)

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