bug#46364: regression in lm-commentary

[Basil L. Contovounesios]

reopen 46364 !
tags 46364 - moreinfo
tags 46364 + confirmed
found 46364 28.0.50
quit

Lars Ingebrigtsen <larsi@gnus.org> writes:

> Boruch Baum <boruch_baum@gmx.com> writes:
>
>> In emacs 26, lm-commentary functions fine.
>> In the emacs-snapshot that I'm using from ~2020-09, it does not
>> correctly indent sub headings.
>>
>> This was observed for the lisp file[1], as processed by MELPA[2], and
>> reproduced by me locally. I don't know what version MELPA is using.
>
> I'm not sure how Melpa is involved here?  Is the problem that
> (lm-commentary "/that/file") doesn't return the correct result on some
> particular file?  If so, can you include the file here in the bug
> tracker, as well as instructions for how to reproduce the bug?

I attach the file in question, diredc.el.  Here's the recipe:

0. emacs -Q
1. (require 'lisp-mnt) C-j
2. (lm-commentary "/path/to/diredc.el") C-j

In Emacs 27, the resulting string includes leading semicolons and
indentation.  In Emacs 28, it doesn't.  Version info follows my
signature.

Thanks,

-- 
Basil

In GNU Emacs 28.0.50 (build 1, x86_64-pc-linux-gnu, X toolkit, cairo version 
1.16.0, Xaw3d scroll bars)
 of 2021-02-07 built on tia
Repository revision: 7c5938ad7d8884d03471e2395937e11611faadb9
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12010000
System Description: Debian GNU/Linux bullseye/sid

Configured using:
 'configure 'CC=ccache gcc' 'CFLAGS=-O2 -march=native' --config-cache
 --prefix=/home/blc/.local --enable-checking=structs
 --with-x-toolkit=lucid --with-file-notification=yes --with-x'

Configured features:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG
JSON LCMS2 LIBOTF LIBSELINUX LIBSYSTEMD LIBXML2 M17N_FLT MODULES NOTIFY
INOTIFY PDUMPER PNG RSVG SOUND THREADS TIFF TOOLKIT_SCROLL_BARS X11
XAW3D XDBE XIM XPM LUCID ZLIB

In GNU Emacs 27.1.91 (build 1, x86_64-pc-linux-gnu, X toolkit, cairo version 
1.16.0, Xaw3d scroll bars)
 of 2021-02-06 built on tia
Repository revision: 8ad48a0bdd0806fe3bfbabf00c845381d9107cb0
Repository branch: emacs-27
Windowing system distributor 'The X.Org Foundation', version 11.0.12010000
System Description: Debian GNU/Linux bullseye/sid

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
Mark set [2 times]

Configured using:
 'configure 'CC=ccache gcc' 'CFLAGS=-O0 -g3 -ggdb -gdwarf-4'
 --config-cache --prefix=/home/blc/.local --program-suffix=-27
 --enable-checking=yes,glyphs --enable-check-lisp-object-type
 --with-x-toolkit=lucid --with-file-notification=yes --with-x
 --with-cairo'

Configured features:
XAW3D XPM JPEG TIFF GIF PNG RSVG CAIRO SOUND GPM DBUS GSETTINGS GLIB
NOTIFY INOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE HARFBUZZ M17N_FLT
LIBOTF ZLIB TOOLKIT_SCROLL_BARS LUCID X11 XDBE XIM MODULES THREADS
LIBSYSTEMD JSON PDUMPER LCMS2 GMP

Important settings:
  value of $LANG: en_IE.UTF-8
  value of $XMODIFIERS: @im=ibus
  locale-coding-system: utf-8-unix

diredc.el
Description: application/emacs-lisp