bug#36735: 25.1; gnus-topic-mode clobbers gnus-group-change-level-function

[dick]

emacs -Q --batch -l gnus --eval "(setq gnus-init-inhibit t)" --eval "(setq 
gnus-current-select-method t)" --eval "(setq gnus-batch-mode t)" --eval 
"(custom-set-variables '(gnus-startup-file \"/dev/null\") 
'(gnus-read-newsrc-file nil) '(gnus-select-method (quote (nnnil))) 
'(gnus-group-change-level-function (lambda (&rest args) (setq foo t))) 
'(gnus-always-read-dribble-file t) '(gnus-use-dribble-file nil))" --eval "(gnus 
nil t nil)" --eval "(setq foo nil)" --eval "(gnus-topic-mode)" --eval "(funcall 
gnus-group-change-level-function \"dummy\" 3 9)" --eval "(cl-assert foo)"



In GNU Emacs 25.1.1 (x86_64-pc-linux-gnu, GTK+ Version 3.18.9)
 of 2016-12-20 built on lgw01-21
Windowing system distributor 'The X.Org Foundation', version 11.0.11804000
System Description:     Ubuntu 16.04.5 LTS

Configured using:
 'configure --build x86_64-linux-gnu --prefix=/usr --sharedstatedir=/var/lib
 --libexecdir=/usr/lib --localstatedir=/var/lib --infodir=/usr/share/info
 --mandir=/usr/share/man --with-pop=yes
 
--enable-locallisppath=/etc/emacs25:/etc/emacs:/usr/local/share/emacs/25.1/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/25.1/site-lisp:/usr/share/emacs/site-lisp
 --build x86_64-linux-gnu --prefix=/usr --sharedstatedir=/var/lib
 --libexecdir=/usr/lib --localstatedir=/var/lib --infodir=/usr/share/info
 --mandir=/usr/share/man --with-pop=yes
 
--enable-locallisppath=/etc/emacs25:/etc/emacs:/usr/local/share/emacs/25.1/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/25.1/site-lisp:/usr/share/emacs/site-lisp
 --with-x=yes --with-x-toolkit=gtk3 --with-toolkit-scroll-bars
 --with-xwidgets=yes 'CFLAGS=-g -O2 -fstack-protector-strong -Wformat
 -Werror=format-security -Wall' 'CPPFLAGS=-Wdate-time -D_FORTIFY_SOURCE=2'
 'LDFLAGS=-Wl,-Bsymbolic-functions -Wl,-z,relro''

Configured features:
XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS GCONF GSETTINGS NOTIFY
ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB
TOOLKIT_SCROLL_BARS GTK3 X11 XWIDGETS

Important settings:
  value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: 
  locale-coding-system: utf-8-unix

Major mode: Emacs-Lisp

Minor modes in effect:
  pyvenv-mode: t
  paredit-mode: t
  recentf-mode: t
  global-company-mode: t
  company-mode: t
  show-paren-mode: t
  global-magit-file-mode: t
  diff-auto-refine-mode: t
  magit-auto-revert-mode: t
  global-auto-revert-mode: t
  global-git-commit-mode: t
  async-bytecomp-package-mode: t
  shell-dirtrack-mode: t
  flx-ido-mode: t
  ido-everywhere: t
  projectile-mode: t
  override-global-mode: t
  global-hl-line-mode: t
  winner-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  mouse-wheel-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent messages:
20190719T202359.625> No more newsgroups
Mark set
Mark saved where search started
my-msmtp-get
Mark set
Saving file /home/dick/.gnus...
Wrote /home/dick/.gnus
((lambda nil "From address keyed off msmtp config if gnus-newsgroup-name in 
effect." (let* (... ... ...) (if ... nil ...))) (lambda nil "From address keyed 
off msmtp config if gnus-newsgroup-name in effect." (let* (... ... ...) 
(message "what %s %s" ... apropos-from) (if ... nil ...))))
(No changes need to be saved)
C-x C-g is undefined

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Features:
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