* bug#40357: 26.3; delete-selection-mode stops working in some C-g cancellation cases
[not found] <060234f7-7dd8-edbb-cd6d-7e9afb2ad722.ref@yahoo.co.uk>
@ 2020-03-31 20:38 ` Raoul Gough via Bug reports for GNU Emacs, the Swiss army knife of text editors
2020-10-26 14:15 ` Lars Ingebrigtsen
0 siblings, 1 reply; 2+ messages in thread
From: Raoul Gough via Bug reports for GNU Emacs, the Swiss army knife of text editors @ 2020-03-31 20:38 UTC (permalink / raw)
To: 40357; +Cc: RaoulGough
While in pending-delete-mode, user cancellation via C-g in some
circumstances can cause Emacs to remove the delete-selection-pre-hook
from pre-command-hook, meaning that pending-delete-mode is still enabled
but stops working. Example situation:
The current buffer is changed on disk
The selection is active
User types or yanks something, triggering deletion of the selection
This pops up a message <file> changed on disk; really edit the buffer?
Hitting C-g at this point causes the problem
Example to reproduce from a freshly started Emacs:
M-x delete-selection-mode
Create a new file, e.g. /tmp/foo
Add some text to the file and save it
Update the file externally, e.g. via C-M-! echo bar >>/tmp/foo RET
Select text in the buffer and type a letter (triggering delete selection)
When prompted with "really edit the buffer?" hit C-g twice
After the repro above, delete-selection-mode is active but does
nothing. Examination of pre-command-hook shows that the
delete-selection-pre-hook hook was removed.
There are some comments in delete-selection-helper which suggests this
is kind-of a known problem but the workaround there only works for
read-only text, not for modified-on-disk files.
In GNU Emacs 26.3 (build 1, x86_64-apple-darwin14.5.0, NS appkit-1348.17
Version 10.10.5 (Build 14F2511))
of 2019-09-02 built on builder10-10.porkrind.org
Windowing system distributor 'Apple', version 10.3.1504
Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
Delete-Selection mode enabled
Saving file /tmp/foo...
Wrote /tmp/foo
(Shell command succeeded with no output)
Mark set
Error in pre-command-hook (delete-selection-pre-hook): (quit)
Quit
Configured using:
'configure --with-ns '--enable-locallisppath=/Library/Application
Support/Emacs/${version}/site-lisp:/Library/Application
Support/Emacs/site-lisp' --with-modules'
Configured features:
NOTIFY ACL GNUTLS LIBXML2 ZLIB TOOLKIT_SCROLL_BARS NS MODULES THREADS
Important settings:
value of $LANG: en_GB.UTF-8
locale-coding-system: utf-8-unix
Major mode: Lisp Interaction
Minor modes in effect:
shell-dirtrack-mode: t
delete-selection-mode: t
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
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 seq byte-opt gv
bytecomp byte-compile cconv cl-loaddefs cl-lib dired dired-loaddefs
format-spec rfc822 mml easymenu 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 shell pcomplete comint
ansi-color ring cus-start cus-load delsel elec-pair time-date tooltip
eldoc electric uniquify ediff-hook vc-hooks lisp-float-type mwheel
term/ns-win ns-win ucs-normalize mule-util 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 kqueue cocoa ns
multi-tty make-network-process emacs)
Memory information:
((conses 16 215383 9376)
(symbols 48 21447 2)
(miscs 40 58 217)
(strings 32 31757 2312)
(string-bytes 1 839659)
(vectors 16 35726)
(vector-slots 8 729632 10140)
(floats 8 49 86)
(intervals 56 220 0)
(buffers 992 13))
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