Subject: Re: bug#32506: 27.0.50; loop regression

From: Glenn Morris <[email-masked]>
Date: Mon, 27 Aug 2018 17:30:44 -0400

Helmut Eller wrote:

> With Emacs25 this
>
> (require 'cl)
>
> (defun foo (vector)
>   (loop for i from -1
> 	for exp = 0 then (list exp e i)
> 	for e across vector
> 	finally (return exp)))
>
> (assert (equal (foo [a b]) '((0 a 0) b 1)))
>
> works as it should.  With the current Emacs version (foo [a b])
> incorrectly returns (0 a 0).
[...]
> In GNU Emacs 27.0.50 (build 7, x86_64-pc-linux-gnu, GTK+ Version 3.22.11)
>  of 2018-08-23 built on caladan
> Repository revision: a4a3c92e9de59bd0251f36326375cce898919edc

Bisects to a0365437c9ee308ad7978e436631020f513b25e7 (bug#29799).
"cl-loop: Add missing guard condition"