[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
bug#40727: 27.0.91; 'cl-loop ... across ... and' seems broken
From: |
Noam Postavsky |
Subject: |
bug#40727: 27.0.91; 'cl-loop ... across ... and' seems broken |
Date: |
Thu, 30 Apr 2020 08:30:48 -0400 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/27.0.91 (gnu/linux) |
tags 40727 + confirmed
quit
Philipp Stephani <p.stephani2@gmail.com> writes:
> In Emacs 26:
>
> emacs -Q -batch -l cl-lib -eval '(cl-loop for x across [1 2] and y across [3
> 4])'
>
> works (i.e. no error), but in Emacs 27 it gives an error
>
> Symbol’s value as variable is void: --cl-vec--
>
> This doesn't happen with "for" instead of "and", and also doesn't happen
> with lists and "in".
It's because of [1: bfca19e475]. I think it should be possible to fix
by grouping the bindings put into 'loop-for-bindings', but meanwhile we
should revert that change, at least on the release branch. It doesn't
revert automatically because there was meanwhile another change to use
'cl--push-clause-loop-body' instead of 'push' on the involved lines, but
after manual fixup your example works correctly.
[1: bfca19e475]: 2018-01-08 00:33:15 +0900
cl-loop: Calculate the array length just once
https://git.savannah.gnu.org/cgit/emacs.git/commit/?id=bfca19e475c01f13dbacc7f8b7bb1aecf46cb7e4
0001-Revert-cl-loop-Calculate-the-array-length-just-once.patch
Description: patch
By the way, while adding the test case I found an additional regression
involving loop termination by a 'var = ...' clause. I'll open another
bug about it soon.