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From: Michael Heerdegen <michael_heerdegen@web.de>
Newsgroups: gmane.emacs.devel
Subject: Re: pcase map binding form expansion failure on Emacs 27 only
Date: Wed, 08 Sep 2021 01:49:49 +0200
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Xref: news.gmane.io gmane.emacs.devel:274296
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Kevin Vigouroux via "Emacs development discussions."
<emacs-devel@gnu.org> writes:

> Each element can also be a SYMBOL, which is an abbreviation of a (KEY
> PAT) tuple of the form ('SYMBOL SYMBOL).

Your Emacs seems to be too old.  Newer versions also have this line:

When SYMBOL is a keyword, it is an abbreviation of the form (:SYMBOL
SYMBOL), useful for binding plist values.


Michael.