bug#73042: 29.1; Regression: negation missing in ediff-nonempty-string-p

bug#73042: 29.1; Regression: negation missing in ediff-nonempty-string-p

[Jurgen De Backer via Bug reports for GNU Emacs, the Swiss army knife of text editors]

Hi,
In emacs 29.1-29.4 the negation is missing in function
ediff-nonempty-string-p, see ediff-init.el:

  (defsubst ediff-nonempty-string-p (string)
    (and (stringp string) (string-empty-p string)))

should be

  (defsubst ediff-nonempty-string-p (string)
    (and (stringp string) (not (string-empty-p string))))



In GNU Emacs 29.1 (build 2, x86_64-pc-linux-gnu, GTK+ Version 3.22.30,
 cairo version 1.15.12) of 2024-08-04 built on dhdevd15
Windowing system distributor 'TigerVNC', version 11.0.12013000
System Description: Red Hat Enterprise Linux 8.8 (Ootpa)

Configured using:
 'configure
 --prefix=/cm/ot/TOOL/GNU!28.0.0.97/build_G!30.IP.L8/generated
 --exec-prefix=/cm/ot/TOOL/GNU!28.0.0.97/build_G!30.IP.L8/generated/libexec/emacs-29.1
 --mandir=/cm/ot/TOOL/GNU!28.0.0.97/build_G!30.IP.L8/generated/man
 --with-x-toolkit=gtk3 --with-modules --without-gconf
 --without-gsettings --without-dbus --with-xft --with-gif=yes
 --with-gnutls=no --enable-link-time-optimization
 'CFLAGS=-I/cm/ot/TOOL/GNU!28.0.0.97/build_G!30.IP.L8/generated/include
 ' LDFLAGS=-L/cm/ot/TOOL/GNU!28.0.0.97/build_G!30.IP.L8/generated/lib'

Configured features:
ACL CAIRO FREETYPE GIF GLIB GMP GPM HARFBUZZ JPEG LCMS2 LIBSELINUX
LIBXML2 MODULES NOTIFY INOTIFY PDUMPER PNG SECCOMP SOUND SQLITE3 THREADS
TIFF TOOLKIT_SCROLL_BARS WEBP X11 XDBE XIM XINPUT2 XPM GTK3 ZLIB

Important settings:
  value of $EMACSDATA: /cm/ot/TOOL/GNU.28.0.0.97/build_G.30.IP.L8/generated/share/emacs/29.1/etc
  value of $EMACSDOC: /cm/ot/TOOL/GNU.28.0.0.97/build_G.30.IP.L8/generated/share/emacs/29.1/etc
  value of $EMACSLOADPATH: /cm/ot/TOOL/GNU.28.0.0.97/build_G.30.IP.L8/generated/share/emacs/29.1/site-lisp:/cm/ot/TOOL/GNU.28.0.0.97/build_G.30.IP.L8/generated/share/emacs/site-lisp:/cm/ot/TOOL/GNU.28.0.0.97/build_G.30.IP.L8/generated/share/emacs/29.1/lisp
  value of $EMACSPATH: /cm/ot/TOOL/GNU.28.0.0.97/build_G.30.IP.L8/generated/libexec/emacs-29.1/libexec/emacs/29.1/x86_64-pc-linux-gnu:
  value of $LANG: C
  locale-coding-system: nil

Major mode: ELisp/l

Minor modes in effect:
  hi-lock-mode: t
  shell-dirtrack-mode: t
  global-display-line-numbers-mode: t
  display-line-numbers-mode: t
  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
  buffer-read-only: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t

Load-path shadows:
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Features:
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multi-isearch emacsbug message yank-media puny rfc822 mml mml-sec epa
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mail-parse rfc2231 mailabbrev gmm-utils mailheader sendmail rfc2047
rfc2045 ietf-drums mm-util mail-prsvr mail-utils hi-lock ob-perl
ob-python ob-shell shell display-line-numbers gnat-compiler-autoloads
ada-mode-autoloads gpc dired dired-loaddefs etags fileloop generator
which-func ido ada-mode wisi-process-parse align ada-skel wisi-skel
skeleton ada-indent-user-options ada-imenu imenu ada-core uniquify-files
gnat-compiler wisi-prj wisi xref project wisi-fringe wisi-parse-common
semantic/lex semantic/fw mode-local find-file compile
text-property-search highlight-beyond-fill-column cperl-mode rx facemenu
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format-spec find-func cal-menu calendar cal-loaddefs memory-usage ffap
thingatpt comint ansi-osc ansi-color ring finder-inf
solarized-theme-autoloads package browse-url url url-proxy url-privacy
url-expand url-methods url-history url-cookie generate-lisp-file
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eieio eieio-core cl-macs password-cache json subr-x map byte-opt gv
bytecomp byte-compile url-vars cl-loaddefs 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
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hashtable-print-readable backquote threads inotify lcms2 dynamic-setting
font-render-setting cairo move-toolbar gtk x-toolkit xinput2 x multi-tty
make-network-process emacs)

Memory information:
((conses 16 159966 12778)
 (symbols 48 17663 0)
 (strings 32 57291 3066)
 (string-bytes 1 1885005)
 (vectors 16 34843)
 (vector-slots 8 655387 75990)
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bug#73042: 29.1; Regression: negation missing in ediff-nonempty-string-p

[Eli Zaretskii]

> Date: Thu, 5 Sep 2024 13:47:28 +0000
> From:  Jurgen De Backer via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
> 
> 
> In emacs 29.1-29.4 the negation is missing in function
> ediff-nonempty-string-p, see ediff-init.el:
> 
>   (defsubst ediff-nonempty-string-p (string)
>     (and (stringp string) (string-empty-p string)))
> 
> should be
> 
>   (defsubst ediff-nonempty-string-p (string)
>     (and (stringp string) (not (string-empty-p string))))

Thanks, fixed on the emacs-30 branch, and closing the bug.