bug#37579: 26.3; cursor invisible

[ynyaaa]

Evaluate the form below and type C-x C-x,
the box cursor becomes invisible.

(progn
  (transient-mark-mode -1)
  (blink-cursor-mode -1)
  (switch-to-buffer (generate-new-buffer "tmp"))
  (insert "
CKHKIKBEFKCJKJFKCCKFHKBI
CKHKAKHCKBIKBECKCHKBFDKCI
CKHKIKBGJKFJKHAKCFKGAKBG
CKHKAKBGHKGAKIHKEJKDCKED
CKHKAKHFKEIKBGCKFJKBHIKGA
CKHKAKBEDKHHKJDKGIKEIKGF
CKHKAKFGKGGKBDHKHFKBFGKHH
AKJIKAKAKAKCAAKCAA
CKBCKHKHFKEBKIAKFDKIDKHE
CKBCKHKBCIKDGKBCFKFAKBCCKGH
CKHKAKBHKBCBKEHKBAJKGDKIJ
CKHKAKCAKBEAKFCKBCHKHDKBAJ
CKHKIKBFIKHJKBCJKIDKBAFKIH
CKDCKEAAAKBFGKHJKBFGKIJKBFFKBAA
CKHKIKBFHKBABKBBIKBAEKBAFKBAF
CKHKIKBAJKBAFKBEBKBACKBGAKBAB
CKHKIKBBCKBCAKBDBKBBHKBFIKBBG
CKHKIKBBBKBDFKBDHKBDDKBFIKBDC
CKHKIKBBBKBFCKBDFKBEJKBFHKBEI
CKHKIKBBAKBGHKBDFKBGFKBFHKBGE
BKCABCKDCKBBCKBBAKBBCKBGG
GKCADCKIKBBCKBGGKBBCKBIFKBDCKBIFKBICKBHJ
CKHKIKBHAKBEIKBHCKBGDKBHIKBHI
CKBCKIKIFKJAKIFKBDHKIFKBIG
BKBCKAKFAKBDFKFAKBIG
CKHKIKBAGKIIKBDCKICKBFJKHJ

CKHKIKBEFKCJKJFKCCKFHKBI
CKHKAKHCKBIKBECKCHKBFDKCI
CKHKIKBGJKFJKHAKCFKGAKBG
CKHKAKBGHKGAKIHKEJKDCKED
CKHKAKHFKEIKBGCKFJKBHIKGA
CKHKAKBEDKHHKJDKGIKEIKGF
CKHKAKFGKGGKBDHKHFKBFGKHH
CKAKHKBDHKIJKBFDKBAJKBIDKBCB
CKAKHKBCHKBAJKBEIKBCHKBIAKBEA
AKJIKAKAKAKCAAKCAA
CKBCKHKHFKEBKIAKFDKIDKHE
CKBCKHKBCIKDGKBCFKFAKBCCKGH
CKHKIKBFIKHJKBCJKIDKBAFKIH
CKDCKEAAAKBFGKHJKBFGKIJKBFFKBAA
CKHKIKBFHKBABKBBIKBAEKBAFKBAF
CKHKIKBAJKBAFKBEBKBACKBGAKBAB
CKHKIKBBCKBCAKBDBKBBHKBFIKBBG
CKHKIKBBBKBDFKBDHKBDDKBFIKBDC
CKHKIKBBBKBFCKBDFKBEJKBFHKBEI
CKHKIKBBAKBGHKBDFKBGFKBFHKBGE
BKBCKDCKBBCKBBAKBBCKBGG
GKDCKIKBBCKBGGKBBCKBIFKBDCKBIFKBICKBHJ
CKHKIKBHAKBEIKBHCKBGDKBHIKBHI
CKHKIKBAGKIIKBDCKICKBFJKHJ
CKBCKIKIFKJAKIFKBDHKIFKBIG
CKBCKIKFAKBDFKFAKBGAKFAKBIG
")
  (goto-char (point-min))
  (search-forward "\n\n")
  (end-of-buffer)
  (split-window)
  )


In GNU Emacs 26.3 (build 1, x86_64-w64-mingw32)
 of 2019-08-29 built on CIRROCUMULUS
Repository revision: 96dd0196c28bc36779584e47fffcca433c9309cd
Windowing system distributor 'Microsoft Corp.', version 6.3.9600
Recent messages:

Configured using:
 'configure --without-dbus --host=x86_64-w64-mingw32
 --without-compress-install 'CFLAGS=-O2 -static -g3''

Configured features:
XPM JPEG TIFF GIF PNG RSVG SOUND NOTIFY ACL GNUTLS LIBXML2 ZLIB
TOOLKIT_SCROLL_BARS THREADS LCMS2

Important settings:
  value of $LANG: JPN
  locale-coding-system: cp932

Major mode: Lisp Interaction

Minor modes in effect:
  tooltip-mode: t
  global-eldoc-mode: t
  eldoc-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-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
  line-number-mode: t

Load-path shadows:
None found.

Features:
(network-stream nsm starttls tls gnutls mailalias smtpmail auth-source
cl-seq eieio eieio-core cl-macs eieio-loaddefs misearch multi-isearch pp
shadow sort mail-extr emacsbug message rmc puny seq byte-opt gv bytecomp
byte-compile cconv dired dired-loaddefs format-spec rfc822 mml mml-sec
password-cache epa derived epg epg-config gnus-util rmail rmail-loaddefs
mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils
mailheader sendmail rfc2047 rfc2045 ietf-drums mm-util mail-prsvr
mail-utils cl-extra thingatpt help-fns radix-tree help-mode cl-loaddefs
cl-lib image-mode easymenu elec-pair time-date mule-util japan-util
tooltip eldoc electric uniquify ediff-hook vc-hooks lisp-float-type
mwheel dos-w32 ls-lisp disp-table term/w32-win w32-win w32-vars
term/common-win tool-bar dnd fontset image regexp-opt fringe
tabulated-list replace newcomment text-mode elisp-mode lisp-mode
prog-mode register page menu-bar rfn-eshadow isearch timer select
scroll-bar mouse jit-lock font-lock syntax facemenu font-core
term/tty-colors frame cl-generic 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 charscript charprop case-table epa-hook jka-cmpr-hook
help simple abbrev obarray minibuffer cl-preloaded nadvice loaddefs
button faces cus-face macroexp files text-properties overlay sha1 md5
base64 format env code-pages mule custom widget hashtable-print-readable
backquote threads w32notify w32 lcms2 multi-tty make-network-process
emacs)

Memory information:
((conses 16 113204 22594)
 (symbols 48 21331 4)
 (miscs 40 65 276)
 (strings 32 33281 1625)
 (string-bytes 1 884230)
 (vectors 16 16922)
 (vector-slots 8 597409 10630)
 (floats 8 64 354)
 (intervals 56 568 0)
 (buffers 992 18))