GNU bug report logs - #61281
“`(a \, b)” equals to “`(a . ,b)”

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Message #8 received at 61281 <at> debbugs.gnu.org (full text, mbox):

From: Drew Adams <drew.adams <at> oracle.com>
To: Xie Shynur <one.last.kiss <at> outlook.com>, "61281 <at> debbugs.gnu.org"
 <61281 <at> debbugs.gnu.org>
Subject: RE: “`(a \, b)” equals to “`(a . , b)”
Date: Sat, 4 Feb 2023 23:34:48 +0000

Good catch!

`(a \, b) returns (a . <value-of-b>)

Looks like a bug to me.

The code in backquote.el that causes this is this bit
of the definition of function backquote-process:
(eq (car s) backquote-unquote-symbol), where the value
of variable backquote-unquote-symbol is the symbol \,

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