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Subject: bug#79746: 29.3; query-replace history stuck if previous replace occupies about the minibuffer length
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Dear Emacs developers

Using query-replace, up and down keys navigate through replace history.
However, if last replace (default) occupies about the length of the
minibuffer, history navigation gets stuck.

How to reproduce:

1. emacs -Q

2. Make some dummy replaces to get some replace history. It doesn't
matter if searches fail.  (They fail as we are in empty *scratch*)

type:

M-% a RET b RET
M-% c RET d RET
M-% e RET f RET

3. Optionally use up/down keys to navigate through replace history. It works!

M-% up up down C-g

4. To trigger the bug make a replace whose "default previous replace"
ocupy the entire minibuffer line.  This can be done with search with 26
chars and replacement text with 25 chars (I skip z in replacement
text). Here I use the alphabet

M-% abcdefghijklmnopqrstuvwxyz RET abcdefghijklmnopqrstuvwxy RET

5. Now the bug: make another query-relace and try to access history. It
will fail.

M-% up       ; this will call last replacement
up up up     ; now history is STUCK in last replace, no previous appears
down down up

6. Work around: make another short replace and quit, so that default
previous replace changes.

M-% a RET b RET C-g

7. nowHistory works again.

M-% up up up down down  ; history works

In GNU Emacs 29.3 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.41,
 cairo version 1.18.0) of 2024-04-01, modified by Debian built on
 lcy02-amd64-083
Windowing system distributor 'The X.Org Foundation', version 11.0.12101011
System Description: Ubuntu 24.04.3 LTS

Configured using:
 'configure --build x86_64-linux-gnu --prefix=/usr
 --sharedstatedir=/var/lib --libexecdir=/usr/libexec
 --localstatedir=/var/lib --infodir=/usr/share/info
 --mandir=/usr/share/man --with-libsystemd --with-pop=yes
 --enable-locallisppath=/etc/emacs:/usr/local/share/emacs/29.3/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/29.3/site-lisp:/usr/share/emacs/site-lisp
 --with-sound=alsa --without-gconf --with-mailutils
 --with-native-compilation --build x86_64-linux-gnu --prefix=/usr
 --sharedstatedir=/var/lib --libexecdir=/usr/libexec
 --localstatedir=/var/lib --infodir=/usr/share/info
 --mandir=/usr/share/man --with-libsystemd --with-pop=yes
 --enable-locallisppath=/etc/emacs:/usr/local/share/emacs/29.3/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/29.3/site-lisp:/usr/share/emacs/site-lisp
 --with-sound=alsa --without-gconf --with-mailutils
 --with-native-compilation --with-cairo --with-x=yes
 --with-x-toolkit=gtk3 --with-toolkit-scroll-bars 'CFLAGS=-g -O2
 -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer
 -ffile-prefix-map=/build/emacs-0yuuFP/emacs-29.3+1=. -fstack-protector-strong
 -fstack-clash-protection -Wformat -Werror=format-security
 -fcf-protection
 -fdebug-prefix-map=/build/emacs-0yuuFP/emacs-29.3+1=/usr/src/emacs-1:29.3+1-1ubuntu2
 -Wall' 'CPPFLAGS=-Wdate-time -D_FORTIFY_SOURCE=3'
 'LDFLAGS=-Wl,-Bsymbolic-functions -Wl,-z,relro''

Configured features:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG
JSON LCMS2 LIBOTF LIBSELINUX LIBSYSTEMD LIBXML2 M17N_FLT MODULES
NATIVE_COMP NOTIFY INOTIFY PDUMPER PNG RSVG SECCOMP SOUND SQLITE3
THREADS TIFF TOOLKIT_SCROLL_BARS TREE_SITTER WEBP X11 XDBE XIM XINPUT2
XPM GTK3 ZLIB

Important settings:
  value of $LANG: pt_BR.UTF-8
  value of $XMODIFIERS: @im=ibus
  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
  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
  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 mail-extr emacsbug message mailcap yank-media puny dired
dired-loaddefs rfc822 mml mml-sec password-cache epa derived epg rfc6068
epg-config gnus-util text-property-search time-date mm-decode mm-bodies
mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader sendmail
rfc2047 rfc2045 ietf-drums mm-util mail-prsvr mail-utils thingatpt
cl-loaddefs comp comp-cstr warnings icons subr-x rx cl-seq cl-macs gv
cl-extra help-mode bytecomp byte-compile cl-lib rmc iso-transl tooltip
cconv eldoc paren electric uniquify ediff-hook vc-hooks lisp-float-type
elisp-mode 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 lisp-mode prog-mode register page tab-bar menu-bar rfn-eshadow
isearch easymenu timer select scroll-bar 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 lcms2
dynamic-setting system-font-setting font-render-setting cairo
move-toolbar gtk x-toolkit xinput2 x multi-tty make-network-process
native-compile emacs)

Memory information:
((conses 16 77383 13830)
 (symbols 48 7182 0)
 (strings 32 19563 2230)
 (string-bytes 1 588709)
 (vectors 16 15349)
 (vector-slots 8 324545 18506)
 (floats 8 27 43)
 (intervals 56 292 0)
 (buffers 984 11))

-- 
Miguel Vinicius Santini Frasson
mvsfrasson@HIDDEN

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To: "Miguel V. S. Frasson" <mvsfrasson@HIDDEN>
Subject: bug#79746: Acknowledgement (29.3; query-replace history stuck if
 previous replace occupies about the minibuffer length)
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Subject: bug#79746: 29.3; query-replace history stuck if previous replace occupies about the minibuffer length
Resent-From: Eli Zaretskii <eliz@HIDDEN>
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> From: "Miguel V. S. Frasson" <mvsfrasson@HIDDEN>
> Date: Fri, 31 Oct 2025 23:19:48 -0300
> 
> Dear Emacs developers
> 
> Using query-replace, up and down keys navigate through replace history.
> However, if last replace (default) occupies about the length of the
> minibuffer, history navigation gets stuck.
> 
> How to reproduce:
> 
> 1. emacs -Q
> 
> 2. Make some dummy replaces to get some replace history. It doesn't
> matter if searches fail.  (They fail as we are in empty *scratch*)
> 
> type:
> 
> M-% a RET b RET
> M-% c RET d RET
> M-% e RET f RET
> 
> 3. Optionally use up/down keys to navigate through replace history. It works!
> 
> M-% up up down C-g
> 
> 4. To trigger the bug make a replace whose "default previous replace"
> ocupy the entire minibuffer line.  This can be done with search with 26
> chars and replacement text with 25 chars (I skip z in replacement
> text). Here I use the alphabet
> 
> M-% abcdefghijklmnopqrstuvwxyz RET abcdefghijklmnopqrstuvwxy RET
> 
> 5. Now the bug: make another query-relace and try to access history. It
> will fail.
> 
> M-% up       ; this will call last replacement
> up up up     ; now history is STUCK in last replace, no previous appears
> down down up

To reliably navigate through history, use M-p and M-n, not the arrow
keys.

Message sent to bug-gnu-emacs@HIDDEN:

Subject: bug#79746: 29.3; query-replace history stuck if previous replace occupies about the minibuffer length
Resent-From: Juri Linkov <juri@HIDDEN>
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From: Juri Linkov <juri@HIDDEN>
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Date: Sat, 01 Nov 2025 19:40:30 +0200
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> 5. Now the bug: make another query-relace and try to access history. It
> will fail.
>
> M-% up       ; this will call last replacement
> up up up     ; now history is STUCK in last replace, no previous appears
> down down up

Thanks for the bug report.  As usually, this is due to boundary conditions
that can be fixed by this patch:

diff --git a/lisp/simple.el b/lisp/simple.el
index 8a88084986e..15031b6a633 100644
--- a/lisp/simple.el
+++ b/lisp/simple.el
@@ -3191,7 +3191,7 @@ previous-line-or-history-element
           ;; Avoid moving point to the prompt
           (when (< (point) (minibuffer-prompt-end))
             ;; If there is minibuffer contents on the same line
-            (if (<= (minibuffer-prompt-end)
+            (if (< (minibuffer-prompt-end)
                     (save-excursion
                       (if (or truncate-lines (not line-move-visual))
                           (end-of-line)

Hopefully this will not break other cases.

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Hi, Juri

I tested many combinations of sizes of default replacement and I
couldn't reproduce the bug anymore. It seams it is fixed.

Thanks.

Miguel

Em s=C3=A1b., 1 de nov. de 2025 =C3=A0s 14:41, Juri Linkov <juri@HIDDEN=
> escreveu:
>
> > 5. Now the bug: make another query-relace and try to access history. It
> > will fail.
> >
> > M-% up       ; this will call last replacement
> > up up up     ; now history is STUCK in last replace, no previous appear=
s
> > down down up
>
> Thanks for the bug report.  As usually, this is due to boundary condition=
s
> that can be fixed by this patch:
>
> diff --git a/lisp/simple.el b/lisp/simple.el
> index 8a88084986e..15031b6a633 100644
> --- a/lisp/simple.el
> +++ b/lisp/simple.el
> @@ -3191,7 +3191,7 @@ previous-line-or-history-element
>            ;; Avoid moving point to the prompt
>            (when (< (point) (minibuffer-prompt-end))
>              ;; If there is minibuffer contents on the same line
> -            (if (<=3D (minibuffer-prompt-end)
> +            (if (< (minibuffer-prompt-end)
>                      (save-excursion
>                        (if (or truncate-lines (not line-move-visual))
>                            (end-of-line)
>
> Hopefully this will not break other cases.



--=20
Miguel Vinicius Santini Frasson
mvsfrasson@HIDDEN

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Der Eli

I learned M-p and M-n now. Thanks. But it seems Juri fixed the bug
when using arrow keys.

Miguel

Em s=C3=A1b., 1 de nov. de 2025 =C3=A0s 04:18, Eli Zaretskii <eliz@HIDDEN>=
 escreveu:
>
> > From: "Miguel V. S. Frasson" <mvsfrasson@HIDDEN>
> > Date: Fri, 31 Oct 2025 23:19:48 -0300
> >
> > Dear Emacs developers
> >
> > Using query-replace, up and down keys navigate through replace history.
> > However, if last replace (default) occupies about the length of the
> > minibuffer, history navigation gets stuck.
> >
> > How to reproduce:
> >
> > 1. emacs -Q
> >
> > 2. Make some dummy replaces to get some replace history. It doesn't
> > matter if searches fail.  (They fail as we are in empty *scratch*)
> >
> > type:
> >
> > M-% a RET b RET
> > M-% c RET d RET
> > M-% e RET f RET
> >
> > 3. Optionally use up/down keys to navigate through replace history. It =
works!
> >
> > M-% up up down C-g
> >
> > 4. To trigger the bug make a replace whose "default previous replace"
> > ocupy the entire minibuffer line.  This can be done with search with 26
> > chars and replacement text with 25 chars (I skip z in replacement
> > text). Here I use the alphabet
> >
> > M-% abcdefghijklmnopqrstuvwxyz RET abcdefghijklmnopqrstuvwxy RET
> >
> > 5. Now the bug: make another query-relace and try to access history. It
> > will fail.
> >
> > M-% up       ; this will call last replacement
> > up up up     ; now history is STUCK in last replace, no previous appear=
s
> > down down up
>
> To reliably navigate through history, use M-p and M-n, not the arrow
> keys.



--=20
Miguel Vinicius Santini Frasson
mvsfrasson@HIDDEN

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close 79746 31.0.50
thanks

> I tested many combinations of sizes of default replacement and I
> couldn't reproduce the bug anymore. It seams it is fixed.

Thanks for confirming.  So now pushed and closed.

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close 79746 31.0.50
thanks

> I tested many combinations of sizes of default replacement and I
> couldn't reproduce the bug anymore. It seams it is fixed.

Thanks for confirming.  So now pushed and closed.

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