From: ynyaaa@gmail.com
To: 37580@debbugs.gnu.org
Subject: bug#37580: 26.3; setting buffer as unibyte temporarily may change buffer contents
Date: Wed, 02 Oct 2019 18:43:45 +0900 [thread overview]
Message-ID: <86ftkbscry.fsf@gmail.com> (raw)
If a multibyte buffer contains eight-bit character sequences,
evaluating the form
(progn (set-buffer-multibyte nil) (set-buffer-multibyte t))
may convert them to multibyte characters.
Afterwards, buffer-undo-list may be inappropriate.
Undo in the form below changes the position of character '1'.
(with-temp-buffer
(insert "一123")
(encode-coding-region 1 2 'utf-8)
(buffer-enable-undo)
(undo-boundary)
(progn (goto-char (point-min))
(search-forward "1")
(delete-char -1))
(undo-boundary)
(progn (set-buffer-multibyte nil)
(set-buffer-multibyte t))
(undo)
(buffer-string))
=>"一231"
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 120602 43655)
(symbols 48 21333 2)
(miscs 40 80 287)
(strings 32 35067 1048)
(string-bytes 1 899321)
(vectors 16 16930)
(vector-slots 8 597369 14750)
(floats 8 64 249)
(intervals 56 848 3)
(buffers 992 21))
next reply other threads:[~2019-10-02 9:43 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-02 9:43 ynyaaa [this message]
2019-10-02 15:14 ` bug#37580: 26.3; setting buffer as unibyte temporarily may change buffer contents Eli Zaretskii
2019-10-05 17:18 ` ynyaaa
2019-10-05 18:56 ` Eli Zaretskii
2019-10-28 23:26 ` Stefan Kangas
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=86ftkbscry.fsf@gmail.com \
--to=ynyaaa@gmail.com \
--cc=37580@debbugs.gnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this external index
https://git.savannah.gnu.org/cgit/emacs.git
https://git.savannah.gnu.org/cgit/emacs/org-mode.git
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.