bug#48249: 28.0.50; Regression: emacs confused about window configuration due to ido-mode and/or winner-mode

[Basil L. Contovounesios]

Dima Kogan <dima@secretsauce.net> writes:

> Hi. I'm running a bleeding-edge build of emacs, and I've been observing
> a really annoying behavior regression for the last few months. It was
> somewhat elusive, but I finally just figured out how to reproduce it, so
> I'm now reporting the bug.
>
> Emacs periodically gets into a confused state, where simple commands
> like (switch-to-other-buffer) start doing strange things (switching to
> the wrong buffer, messing with the window configuration, etc). And the
> point often gets stuck in the minibuffer, requiring an explicit switch
> command to get out of there. Killing that emacs frame, and starting a
> new one (I'm using the emacs server) would fix it for the new frame for
> a while, until that frame gets confused too.

Exactly the same story here with ivy-mode and winner-mode.  I thought
I'd found a reproducer in https://bugs.gnu.org/48229, but that's
actually a duplicate of https://bugs.gnu.org/47766, which was fixed
today:

Fix wrong handling of minibuffers when frames get iconified/made invisible
c873d16af6 2021-05-06 10:48:14 +0000
https://git.sv.gnu.org/cgit/emacs.git/commit/?id=c873d16af61ae9b956c6dd6d9e50ebad2bb7666e

> I haven't tried to rebuild today, but this bug exists in the emacs git
> as of May 1.

I can confirm the bug in your recipe still happens with latest master
(report-emacs-bug details follow my signature).  CCing Alan.

Thanks,

-- 
Basil

In GNU Emacs 28.0.50 (build 1, x86_64-pc-linux-gnu, X toolkit, cairo version 
1.16.0, Xaw3d scroll bars)
 of 2021-05-06 built on tia
Repository revision: 5ec4a3dbbc81ef9ed51065189a19689c351e0e8d
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12011000
System Description: Debian GNU/Linux bullseye/sid

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
Winner undo (1 / 2)
Quit

Configured using:
 'configure 'CC=ccache gcc' 'CFLAGS=-O2 -march=native' --config-cache
 --prefix=/home/blc/.local --enable-checking=structs
 --with-x-toolkit=lucid --with-file-notification=yes --with-x'

Configured features:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG
JSON LCMS2 LIBOTF LIBSELINUX LIBSYSTEMD LIBXML2 M17N_FLT MODULES NOTIFY
INOTIFY PDUMPER PNG RSVG SECCOMP SOUND THREADS TIFF TOOLKIT_SCROLL_BARS
X11 XAW3D XDBE XIM XPM LUCID ZLIB

Important settings:
  value of $LANG: en_IE.UTF-8
  value of $XMODIFIERS: @im=ibus
  locale-coding-system: utf-8-unix

Major mode: InactiveMinibuffer

Minor modes in effect:
  winner-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
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Load-path shadows:
None found.

Features:
(shadow sort mail-extr emacsbug message rmc puny dired dired-loaddefs
rfc822 mml mml-sec epa derived epg epg-config gnus-util rmail
rmail-loaddefs auth-source cl-seq eieio eieio-core cl-macs
eieio-loaddefs password-cache json map 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 winner ring ido seq byte-opt gv
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ediff-hook vc-hooks 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 text-mode elisp-mode lisp-mode
prog-mode register page tab-bar menu-bar rfn-eshadow isearch easymenu
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term/tty-colors frame minibuffer cl-generic cham georgian utf-8-lang
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loaddefs faces cus-face macroexp files window text-properties overlay
sha1 md5 base64 format env code-pages mule custom widget
hashtable-print-readable backquote threads dbusbind inotify lcms2
dynamic-setting system-font-setting font-render-setting cairo x-toolkit
x multi-tty make-network-process emacs)

Memory information:
((conses 16 55722 8253)
 (symbols 48 6957 1)
 (strings 32 19914 1941)
 (string-bytes 1 653549)
 (vectors 16 13237)
 (vector-slots 8 177049 10255)
 (floats 8 34 50)
 (intervals 56 232 0)
 (buffers 992 10))