bug#48407: 28.0.50; mpc doesn't work in master

[Jose A. Ortega Ruiz]

- emacs -Q
- M-x mpc
- Start playing any song.  The status update callback starts failing
  continuosly with
    error in process filter: Lisp nesting exceeds ‘max-lisp-eval-depth’
  [10 times]
- One can do a C-g and quickly stop music, and then the errors stop too,
  so it seems to be happening only when music is playing

Thanks!


In GNU Emacs 28.0.50 (build 2, x86_64-pc-linux-gnu, X toolkit, cairo version 
1.16.0)
 of 2021-05-13 built on osgiliath
Repository revision: 43701a84367b76ccc93ad46f89110486988eec10
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12011000
System Description: Debian GNU/Linux 11 (bullseye)

Configured using:
 'configure --prefix=/usr/local/stow/emacs --without-imagemagick
 --with-x-toolkit=lucid --with-toolkit-scroll-bars=no
 --with-native-compilation'

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

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

Major mode: Group

Minor modes in effect:
  gnus-topic-mode: t
  gnus-undo-mode: t
  mpdel-mode: t
  telega-root-auto-fill-mode: t
  telega-patrons-mode: t
  telega-mode-line-mode: t
  sly-symbol-completion-mode: t
  show-paren-mode: t
  global-diff-hl-mode: t
  eshell-syntax-highlighting-global-mode: t
  shell-dirtrack-mode: t
  winner-mode: t
  global-auto-revert-mode: t
  marginalia-mode: t
  global-company-mode: t
  company-mode: t
  persistent-scratch-autosave-mode: t
  global-so-long-mode: t
  ednc-mode: t
  display-battery-mode: t
  repeat-mode: t
  savehist-mode: t
  recentf-mode: t
  save-place-mode: t
  override-global-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  buffer-read-only: t
  column-number-mode: t
  line-number-mode: t

Load-path shadows:
/home/jao/lib/elisp/notmuch/notmuch-show hides 
/home/jao/.emacs.d/elpa.28/notmuch-20210205.1412/notmuch-show
/home/jao/lib/elisp/notmuch/notmuch-crypto hides 
/home/jao/.emacs.d/elpa.28/notmuch-20210205.1412/notmuch-crypto
/home/jao/lib/elisp/notmuch/notmuch-mua hides 
/home/jao/.emacs.d/elpa.28/notmuch-20210205.1412/notmuch-mua
/home/jao/lib/elisp/notmuch/notmuch-tree hides 
/home/jao/.emacs.d/elpa.28/notmuch-20210205.1412/notmuch-tree
/home/jao/lib/elisp/notmuch/notmuch-parser hides 
/home/jao/.emacs.d/elpa.28/notmuch-20210205.1412/notmuch-parser
/home/jao/lib/elisp/notmuch/notmuch-hello hides 
/home/jao/.emacs.d/elpa.28/notmuch-20210205.1412/notmuch-hello
/home/jao/lib/elisp/notmuch/notmuch-lib hides 
/home/jao/.emacs.d/elpa.28/notmuch-20210205.1412/notmuch-lib
/home/jao/lib/elisp/notmuch/notmuch-pkg hides 
/home/jao/.emacs.d/elpa.28/notmuch-20210205.1412/notmuch-pkg
/home/jao/lib/elisp/notmuch/notmuch-maildir-fcc hides 
/home/jao/.emacs.d/elpa.28/notmuch-20210205.1412/notmuch-maildir-fcc
/home/jao/lib/elisp/notmuch/notmuch-jump hides 
/home/jao/.emacs.d/elpa.28/notmuch-20210205.1412/notmuch-jump
/home/jao/lib/elisp/notmuch/notmuch-company hides 
/home/jao/.emacs.d/elpa.28/notmuch-20210205.1412/notmuch-company
/home/jao/lib/elisp/notmuch/notmuch-address hides 
/home/jao/.emacs.d/elpa.28/notmuch-20210205.1412/notmuch-address
/home/jao/lib/elisp/notmuch/notmuch-draft hides 
/home/jao/.emacs.d/elpa.28/notmuch-20210205.1412/notmuch-draft
/home/jao/lib/elisp/notmuch/notmuch-tag hides 
/home/jao/.emacs.d/elpa.28/notmuch-20210205.1412/notmuch-tag
/home/jao/lib/elisp/notmuch/notmuch-message hides 
/home/jao/.emacs.d/elpa.28/notmuch-20210205.1412/notmuch-message
/home/jao/lib/elisp/notmuch/notmuch hides 
/home/jao/.emacs.d/elpa.28/notmuch-20210205.1412/notmuch
/home/jao/lib/elisp/notmuch/notmuch-autoloads hides 
/home/jao/.emacs.d/elpa.28/notmuch-20210205.1412/notmuch-autoloads
/home/jao/lib/elisp/notmuch/coolj hides 
/home/jao/.emacs.d/elpa.28/notmuch-20210205.1412/coolj
/home/jao/lib/elisp/notmuch/notmuch-print hides 
/home/jao/.emacs.d/elpa.28/notmuch-20210205.1412/notmuch-print
/home/jao/lib/elisp/notmuch/notmuch-query hides 
/home/jao/.emacs.d/elpa.28/notmuch-20210205.1412/notmuch-query
/home/jao/lib/elisp/notmuch/notmuch-compat hides 
/home/jao/.emacs.d/elpa.28/notmuch-20210205.1412/notmuch-compat
/home/jao/lib/elisp/notmuch/notmuch-wash hides 
/home/jao/.emacs.d/elpa.28/notmuch-20210205.1412/notmuch-wash
/home/jao/lib/elisp/org-static-blog/org-static-blog hides 
/home/jao/.emacs.d/elpa.28/org-static-blog-20210329.848/org-static-blog
/home/jao/.emacs.d/elpa.28/circe-20210508.1616/tracking hides 
/home/jao/.emacs.d/elpa.28/tracking-20201101.1045/tracking
/home/jao/.emacs.d/elpa.28/circe-20210508.1616/shorten hides 
/home/jao/.emacs.d/elpa.28/tracking-20201101.1045/shorten
/home/jao/.emacs.d/elpa.28/transient-20210426.2141/transient hides 
/usr/local/stow/emacs/share/emacs/28.0.50/lisp/transient
/home/jao/etc/emacs/site/custom hides 
/usr/local/stow/emacs/share/emacs/28.0.50/lisp/custom

Features:
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gnus-start gnus-dbus gnus-cloud nnimap nnmail mail-source utf7 netrc
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Memory information:
((conses 16 1466984 102342)
 (symbols 48 93744 118)
 (strings 32 395882 21254)
 (string-bytes 1 12790215)
 (vectors 16 129281)
 (vector-slots 8 3213658 53816)
 (floats 8 1373 613)
 (intervals 56 10737 7260)
 (buffers 992 33))

-- 
Who knows what Columbus would have discovered if America hadn't got in the
way. -Stanislaw J. Lec, poet and aphorist (1909-1966)