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* bug#23078: 24.5; Query-replace case insensitive - do not prompt for do-nothing replacements
@ 2016-03-21 14:46 Ed Avis
  2022-05-12 16:30 ` Lars Ingebrigtsen
  0 siblings, 1 reply; 2+ messages in thread
From: Ed Avis @ 2016-03-21 14:46 UTC (permalink / raw)
  To: 23078

This bug report will be sent to the Bug-GNU-Emacs mailing list
and the GNU bug tracker at debbugs.gnu.org.  Please check that
the From: line contains a valid email address.  After a delay of up
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Please write in English if possible, as the Emacs maintainers
usually do not have translators for other languages.

Please describe exactly what actions triggered the bug, and
the precise symptoms of the bug.  If you can, give a recipe
starting from `emacs -Q':

M-x query-replace is case insensitive by default.  You may sometimes
want to replace a string with another differing only in case, for
example changing 'aaa' to 'Aaa'.  But query-replace prompts for all
cases where a case-insensitive match for 'aaa' is found, even those that
already equal the destination string.

Here are the keypresses starting from 'emacs -Q' to reproduce:

a a a RET A a a RET ESC O A ESC O A ESC % a a a RET
A a a RET y

I suggest that if the search and replacement strings differ only in
case, then Emacs should prompt only where there is a real choice to be
made.  When the match of 'Aaa' is highlighted it makes no difference
whether you answer y or n; so Emacs should not waste the user's time
asking.

This does mean that the matches highlighted by query-replace differ from
those you would find with a normal case insensitive search, in these
specific circumstances where the search and replacement strings differ
only in case.  I think that is a fair tradeoff.


If Emacs crashed, and you have the Emacs process in the gdb debugger,
please include the output from the following gdb commands:
    `bt full' and `xbacktrace'.
For information about debugging Emacs, please read the file
/usr/share/emacs/24.5/etc/DEBUG.


In GNU Emacs 24.5.1 (x86_64-redhat-linux-gnu, GTK+ Version 3.18.7)
 of 2016-02-03 on buildhw-05.phx2.fedoraproject.org
Configured using:
 `configure --build=x86_64-redhat-linux-gnu
 --host=x86_64-redhat-linux-gnu --program-prefix=
 --disable-dependency-tracking --prefix=/usr --exec-prefix=/usr
 --bindir=/usr/bin --sbindir=/usr/sbin --sysconfdir=/etc
 --datadir=/usr/share --includedir=/usr/include --libdir=/usr/lib64
 --libexecdir=/usr/libexec --localstatedir=/var
 --sharedstatedir=/var/lib --mandir=/usr/share/man
 --infodir=/usr/share/info --with-dbus --with-gif --with-jpeg --with-png
 --with-rsvg --with-tiff --with-xft --with-xpm --with-x-toolkit=gtk3
 --with-gpm=no build_alias=x86_64-redhat-linux-gnu
 host_alias=x86_64-redhat-linux-gnu 'CFLAGS=-DMAIL_USE_LOCKF -O2 -g
 -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2
 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4
 -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1
 -m64 -mtune=generic' LDFLAGS=-Wl,-z,relro'

Important settings:
  value of $LC_COLLATE: C
  value of $LC_CTYPE: en_GB.UTF-8
  value of $LC_MESSAGES: en_GB.UTF-8
  value of $LC_MONETARY: en_GB.UTF-8
  value of $LC_NUMERIC: en_GB.UTF-8
  value of $LC_TIME: en_GB.UTF-8
  value of $LANG: en_GB.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Lisp Interaction

Minor modes in effect:
  tooltip-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
  transient-mark-mode: t

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Memory information:
((conses 16 73605 5714)
 (symbols 48 17645 0)
 (miscs 40 35 138)
 (strings 32 9016 4221)
 (string-bytes 1 247931)
 (vectors 16 7037)
 (vector-slots 8 341247 33284)
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 (heap 1024 29894 2227))

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2016-03-21 14:46 bug#23078: 24.5; Query-replace case insensitive - do not prompt for do-nothing replacements Ed Avis
2022-05-12 16:30 ` Lars Ingebrigtsen

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