bug#68213: 30.0.50; completion-preview-tests failure in --without-x build

[john muhl]

Running ‘make -k -C test check-lisp’ on master with a build
configured without X produces the following error:

  cd emacs
  ./autogen.sh
  ./configure --without-x
  make -j$(nproc)
  make -k -C test check-lisp
  …
  In toplevel form:
  lisp/completion-preview-tests.el:23:2: Error: Symbol's value
  as variable is void: mouse-wheel-up-event
  make[3]: *** [Makefile:159: lisp/completion-preview-tests.elc] Error 1
  make[3]: Target 'lisp/completion-preview-tests.log' not remade because of 
errors.
  …
  SUMMARY OF TEST RESULTS
  -----------------------
  Files examined: 118
  Ran 2209 tests, 2194 results as expected, 0 unexpected, 15 skipped
  1 files did not contain any tests:
    lisp/completion-preview-tests.log
  make[2]: *** [Makefile:344: check-doit] Error 2
  make[2]: Leaving directory '/home/jm/src/emacs/test'
  make[1]: *** [Makefile:310: check] Error 2
  make[1]: Leaving directory '/home/jm/src/emacs/test'
  make: *** [Makefile:262: check-lisp] Error 2

While running ‘make’ I notice some possibly related warnings:

  In toplevel form:
  completion-preview.el:136:18: Warning: reference to free
  variable ‘mouse-wheel-up-event’
  completion-preview.el:137:18: Warning: reference to free
  variable ‘mouse-wheel-up-alternate-event’
  completion-preview.el:138:18: Warning: reference to free
  variable ‘mouse-wheel-down-event’
  completion-preview.el:139:18: Warning: reference to free
  variable ‘mouse-wheel-down-alternate-event’

My desktop is Fedora but I also tried on Debian testing and the
error is the same there.

In GNU Emacs 30.0.50 (build 1, x86_64-pc-linux-gnu) of 2024-01-02 built
 on localhost
Repository revision: 35b5775d422eafc120964575094c0ea597a88758
Repository branch: builds
System Description: Fedora Linux 39 (Thirty Nine)

Configured using:
 'configure --without-x --without-native-compilation'

Configured features:
ACL DBUS GMP GNUTLS GPM JSON LIBSELINUX LIBSYSTEMD LIBXML2 MODULES
NOTIFY INOTIFY PDUMPER SECCOMP SOUND SQLITE3 THREADS TREE_SITTER XIM
ZLIB

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

Major mode: Lisp Interaction

Minor modes in effect:
  tooltip-mode: t
  global-eldoc-mode: t
  eldoc-mode: t
  show-paren-mode: t
  electric-indent-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  minibuffer-regexp-mode: t
  line-number-mode: t
  indent-tabs-mode: t
  transient-mark-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t

Load-path shadows:
None found.

Features:
(shadow sort regexp-opt mail-extr emacsbug message mailcap yank-media
puny dired dnd dired-loaddefs rfc822 mml mml-sec password-cache epa
derived epg rfc6068 epg-config gnus-util text-property-search time-date
subr-x mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev
gmm-utils mailheader cl-loaddefs cl-lib sendmail rfc2047 rfc2045
ietf-drums mm-util mail-prsvr mail-utils term/xterm xterm byte-opt gv
bytecomp byte-compile rmc iso-transl tooltip cconv eldoc paren electric
uniquify ediff-hook vc-hooks lisp-float-type elisp-mode tabulated-list
replace newcomment text-mode lisp-mode prog-mode register page tab-bar
menu-bar rfn-eshadow isearch easymenu timer select mouse jit-lock
font-lock syntax font-core term/tty-colors frame minibuffer nadvice seq
simple cl-generic indonesian philippine cham georgian utf-8-lang
misc-lang vietnamese tibetan thai tai-viet lao korean japanese eucjp-ms
cp51932 hebrew greek romanian slovak czech european ethiopic indian
cyrillic chinese composite emoji-zwj charscript charprop case-table
epa-hook jka-cmpr-hook help abbrev obarray oclosure cl-preloaded button
loaddefs theme-loaddefs faces cus-face macroexp files window
text-properties overlay sha1 md5 base64 format env code-pages mule
custom widget keymap hashtable-print-readable backquote threads dbusbind
inotify multi-tty make-network-process emacs)

Memory information:
((conses 16 49337 8918) (symbols 48 5807 0) (strings 32 14981 1821)
 (string-bytes 1 436773) (vectors 16 8571)
 (vector-slots 8 107831 8025) (floats 8 24 50) (intervals 56 212 7)
 (buffers 984 10))