bug#33417: 27.0.50; display-buffer problems

[yLive System User]

g--text follows this line--
        "C-x 2" (split-window-below) works fine.: g--text follows this line--
        "C-x 2" (split-window-below) works fine.
Hi,
        I then saw: How can I debug this?
        Thanks.
In GNU Emacs 27.0.50 (build 87, x86_64-pc-linux-gnu, GTK+ Version 3.20.10)
 of 2018-11-15 built on localhost.localdomain: In GNU Emacs 27.0.50 (build 87, 
x86_64-pc-linux-gnu, GTK+ Version 3.20.10)
 of 2018-11-15 built on localhost.localdomain
Repository revision: 35a88c809e9eb5a32dd8d7f0dae960021f4cd707
Repository branch: master
Windowing system distributor 'Fedora Project', version 11.0.11803000: Windowing 
system distributor 'Fedora Project', version 11.0.11803000
System Description: Fedora 24 (Workstation Edition)
Recent messages: 
Checking new news...done: Checking new news...done
Retrieving newsgroup: nnimap+aol:Bulk Mail...
Opening nnimap server on aol...done: Opening nnimap server on aol...done
Fetching headers for nnimap+aol: Bulk Mail...
nnimap read 0k from imap.aim.com [5 times]: nnimap read 0k from imap.aim.com [5 
times]
Fetching headers for nnimap+aol: Bulk Mail...done
Sorting threads...done: Sorting threads...done
Generating summary...done: Generating summary...done
Discard changes to this group and exit? (y or n) y: Discard changes to this 
group and exit? (y or n) y
Auto-saving...done: Auto-saving...done
Configured using: 'configure 'CFLAGS=-DMAIL_USE_LOCKF -O0 -ggdb3 -pipe -Wall
 -Werror=format-security -fexceptions -fstack-protector-strong
 --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mtune=generic'
 LDFLAGS=-Wl,-z,relro
 --prefix=/tmp/emacs-27.0-git-master
 --with-dbus --with-gif --with-jpeg --with-png --with-rsvg --with-lcms2
 --with-tiff --with-xft --with-xpm --with-x-toolkit=gtk3 --with-gpm=yes
 --with-xwidgets --with-modules --with-json'
Configured features: 
XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS GSETTINGS GLIB: XPM JPEG 
TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS GSETTINGS GLIB
NOTIFY INOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF: NOTIFY 
INOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF
XFT ZLIB TOOLKIT_SCROLL_BARS GTK3 X11 XDBE XIM MODULES THREADS XWIDGETS: XFT 
ZLIB TOOLKIT_SCROLL_BARS GTK3 X11 XDBE XIM MODULES THREADS XWIDGETS
JSON LCMS2 GMP: JSON LCMS2 GMP
Important settings: value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: @im=ibus
  locale-coding-system: utf-8-unix
Major mode: Group
Minor modes in effect: diff-auto-refine-mode: t
  cursor-sensor-mode: t
  gnus-desktop-notify-mode: t
  gnus-undo-mode: t
  tooltip-mode: t
  global-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
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  buffer-read-only: t
  line-number-mode: t
  transient-mark-mode: t
Load-path shadows: 
None found.: None found.
(shadow emacsbug face-remap mailalias smtpmail sendmail nnagent nnml: (shadow 
emacsbug face-remap mailalias smtpmail sendmail nnagent nnml
canlock smerge-mode diff-mode jka-compr gnus-notifications gnus-fun sort: 
canlock smerge-mode diff-mode jka-compr gnus-notifications gnus-fun sort
gnus-cite smiley ansi-color mail-extr gnus-async gnus-bcklg qp gnus-ml: 
gnus-cite smiley ansi-color mail-extr gnus-async gnus-bcklg qp gnus-ml
disp-table cursor-sensor nndraft nnmh nndoc mm-archive timezone url-http: 
disp-table cursor-sensor nndraft nnmh nndoc mm-archive timezone url-http
url-gw url-cache url-auth url-handlers utf-7 rfc2104 nnfolder gnutls: url-gw 
url-cache url-auth url-handlers utf-7 rfc2104 nnfolder gnutls
network-stream nsm gnus-agent gnus-srvr gnus-score score-mode nnvirtual: 
network-stream nsm gnus-agent gnus-srvr gnus-score score-mode nnvirtual
gnus-msg gnus-cache pp cl-print cl-extra thingatpt help-fns radix-tree: 
gnus-msg gnus-cache pp cl-print cl-extra thingatpt help-fns radix-tree
help-mode gnus-demon nntp gnus-desktop-notify easy-mmode notifications: 
help-mode gnus-demon nntp gnus-desktop-notify easy-mmode notifications
dbus xml epa-file nnreddit mm-url url url-proxy url-privacy url-expand: dbus 
xml epa-file nnreddit mm-url url url-proxy url-privacy url-expand
url-methods url-history url-cookie url-domsuf url-util url-parse: url-methods 
url-history url-cookie url-domsuf url-util url-parse
auth-source cl-seq eieio eieio-core cl-macs eieio-loaddefs url-vars json: 
auth-source cl-seq eieio eieio-core cl-macs eieio-loaddefs url-vars json
map gnus-art mm-uu mml2015 mm-view mml-smime smime dig mailcap cl sieve: map 
gnus-art mm-uu mml2015 mm-view mml-smime smime dig mailcap cl sieve
sieve-mode sieve-manage sasl sasl-anonymous sasl-login sasl-plain advice: 
sieve-mode sieve-manage sasl sasl-anonymous sasl-login sasl-plain advice
nnir gnus-sum gnus-group gnus-undo gnus-start gnus-cloud nnimap nnmail: nnir 
gnus-sum gnus-group gnus-undo gnus-start gnus-cloud nnimap nnmail
mail-source utf7 netrc parse-time gnus-spec gnus-int gnus-range message: 
mail-source utf7 netrc parse-time gnus-spec gnus-int gnus-range message
rmc puny dired dired-loaddefs format-spec rfc822 mml easymenu mml-sec: rmc puny 
dired dired-loaddefs format-spec rfc822 mml easymenu mml-sec
password-cache epa derived epg epg-config mm-decode mm-bodies mm-encode: 
password-cache epa derived epg epg-config mm-decode mm-bodies mm-encode
mail-parse rfc2231 mailabbrev gmm-utils mailheader gnus-win gnus seq: 
mail-parse rfc2231 mailabbrev gmm-utils mailheader gnus-win gnus seq
byte-opt gv bytecomp byte-compile cconv wid-edit cl-loaddefs cl-lib nnoo: 
byte-opt gv bytecomp byte-compile cconv wid-edit cl-loaddefs cl-lib nnoo
nnheader gnus-util rmail rmail-loaddefs rfc2047 rfc2045 ietf-drums: nnheader 
gnus-util rmail rmail-loaddefs rfc2047 rfc2045 ietf-drums
time-date mm-util mail-prsvr mail-utils misearch multi-isearch elec-pair: 
time-date mm-util mail-prsvr mail-utils misearch multi-isearch elec-pair
mule-util tooltip eldoc electric uniquify ediff-hook vc-hooks: mule-util 
tooltip eldoc electric uniquify ediff-hook vc-hooks
lisp-float-type mwheel term/x-win x-win term/common-win x-dnd tool-bar: 
lisp-float-type mwheel term/x-win x-win term/common-win x-dnd tool-bar
dnd fontset image regexp-opt fringe tabulated-list replace newcomment: dnd 
fontset image regexp-opt fringe tabulated-list replace newcomment
text-mode elisp-mode lisp-mode prog-mode register page menu-bar: text-mode 
elisp-mode lisp-mode prog-mode register page menu-bar
rfn-eshadow isearch timer select scroll-bar mouse jit-lock font-lock: 
rfn-eshadow isearch timer select scroll-bar mouse jit-lock font-lock
syntax facemenu font-core term/tty-colors frame cl-generic cham georgian: 
syntax facemenu font-core term/tty-colors frame cl-generic cham georgian
utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean: utf-8-lang 
misc-lang vietnamese tibetan thai tai-viet lao korean
japanese eucjp-ms cp51932 hebrew greek romanian slovak czech european: japanese 
eucjp-ms cp51932 hebrew greek romanian slovak czech european
ethiopic indian cyrillic chinese composite charscript charprop: ethiopic indian 
cyrillic chinese composite charscript charprop
case-table epa-hook jka-cmpr-hook help simple abbrev obarray minibuffer: 
case-table epa-hook jka-cmpr-hook help simple abbrev obarray minibuffer
cl-preloaded nadvice loaddefs button faces cus-face macroexp files: 
cl-preloaded nadvice loaddefs button faces cus-face macroexp files
text-properties overlay sha1 md5 base64 format env code-pages mule: 
text-properties overlay sha1 md5 base64 format env code-pages mule
custom widget hashtable-print-readable backquote threads dbusbind: custom 
widget hashtable-print-readable backquote threads dbusbind
inotify lcms2 dynamic-setting system-font-setting font-render-setting: inotify 
lcms2 dynamic-setting system-font-setting font-render-setting
xwidget-internal move-toolbar gtk x-toolkit x multi-tty: xwidget-internal 
move-toolbar gtk x-toolkit x multi-tty
make-network-process emacs): make-network-process emacs)
Memory information: 
((conses 16 635297 85000)
 (symbols 48 174934 18)
 (strings 32 168679 6874)
 (string-bytes 1 5626914)
 (vectors 16 34638)
 (vector-slots 8 1499799 190812)
 (floats 8 228 1691)
 (intervals 56 1741 138)
 (buffers 992 57)
 (heap 1024 115861 54120)): ((conses 16 635297 85000)
 (symbols 48 174934 18)
 (strings 32 168679 6874)
 (string-bytes 1 5626914)
 (vectors 16 34638)
 (vector-slots 8 1499799 190812)
 (floats 8 228 1691)
 (intervals 56 1741 138)
 (buffers 992 57)
 (heap 1024 115861 54120))
Date: Sat, 17 Nov 2018 21:59:49 -0500
Message-ID: <87ftvz6qfu.fsf@aol.com>