Create a script from this block
################################################################
# The behavior of conditionals depends on whitespace
# Source this script to test it
# This formatting works as expected; evaluates the "true" block.
# Result:
# "It is NOT 2"
#
if { = 2 2 } {
echo "It is 2"
} {
echo "It is NOT 2"
}
# This formatting causes a BUG: both the "true" block and the "false" block are evaluated.
# I tried several combinations, it appears it the "false" block starts on it's own line,
# it is no longer treated a part of the "if" _expression_. Which could be argued
# is expected because there is no "else" that would define whether the second block
# is not part of the "if" _expression_. BUT see next test
#
# Result:
# "It is 3"
# "It is NOT 3"
#
if { = 3 3 } {
echo "It is 3"
}
{
echo "It is NOT 3"
}
# BUT we get the same incorrect result if we place the whole if _expression_ into {}
{
if { = 4 4 } {
echo "It is 4"
}
{
echo "It is NOT 4"
}
}
######################################################################
Actual result:
~/tmp $ source ./conditionals-bug.esh
It is 2
It is 3
It is NOT 3
It is 4
It is NOT 4
Expected result (although 3 may be questionable with eshell syntax):
~/tmp $ source ./conditionals-bug.esh
It is 2
It is 3
It is 4
In GNU Emacs 29.0.50 (build 1, x86_64-suse-linux-gnu, GTK+ Version
3.24.34, cairo version 1.17.6)
System Description: openSUSE Tumbleweed
Configured using:
'configure --host=x86_64-suse-linux-gnu --build=x86_64-suse-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 --disable-build-details --without-pop
--with-mailutils --without-hesiod --with-gameuser=:games
--with-kerberos --with-kerberos5 --with-file-notification=inotify
--with-modules --enable-autodepend --prefix=/usr
--mandir=/usr/share/man --infodir=/usr/share/info --datadir=/usr/share
--localstatedir=/var --sharedstatedir=/var/lib
--libexecdir=/usr/libexec --with-file-notification=yes
--enable-locallisppath=/usr/share/emacs/29.0.50/site-lisp:/usr/share/emacs/site-lisp
--without-x --with-json --without-xim --with-sound --with-xpm
--with-jpeg --with-tiff --with-gif --with-png --with-rsvg --with-dbus
--without-xft --without-gpm --with-pgtk --without-native-compilation
--with-toolkit-scroll-bars --with-libotf --with-m17n-flt --with-cairo
--without-xwidgets --with-dumping=pdumper 'CFLAGS=-O2 -Wall
-U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=3 -fstack-protector-strong
-funwind-tables -fasynchronous-unwind-tables -fstack-clash-protection
-Werror=return-type -flto=auto -D_GNU_SOURCE
-DGDK_DISABLE_DEPRECATION_WARNINGS -DGLIB_DISABLE_DEPRECATION_WARNINGS'
LDFLAGS=-flto=auto'
Configured features:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GSETTINGS HARFBUZZ JPEG JSON
LCMS2 LIBOTF LIBSELINUX LIBSYSTEMD LIBXML2 MODULES NOTIFY INOTIFY
PDUMPER PGTK PNG RSVG SECCOMP SOUND SQLITE3 THREADS TIFF
TOOLKIT_SCROLL_BARS WEBP XIM GTK3 ZLIB
Important settings:
value of $LANG: en_CA.UTF-8
value of $XMODIFIERS: @im=ibus
locale-coding-system: utf-8-unix
Major mode: Eshell
Minor modes in effect:
shell-dirtrack-mode: t
eshell-prompt-mode: t
eshell-hist-mode: t
eshell-pred-mode: t
eshell-cmpl-mode: t
eshell-proc-mode: t
eshell-arg-mode: t
tooltip-mode: t
global-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 mm-decode mm-bodies mm-encode
mail-parse rfc2231 mailabbrev gmm-utils mailheader sendmail rfc2047
rfc2045 ietf-drums mm-util mail-prsvr mail-utils time-date rx em-unix
em-term term disp-table shell subr-x ehelp em-script em-prompt em-ls
em-hist em-pred em-glob em-extpipe em-cmpl em-dirs esh-var pcomplete
comint ansi-osc ansi-color ring em-basic em-banner em-alias esh-mode
eshell esh-cmd generator esh-ext esh-opt esh-proc esh-io esh-arg
esh-module esh-groups esh-util cus-edit pp cus-start cus-load icons
wid-edit cl-loaddefs cl-lib files-x rmc iso-transl tooltip cconv eldoc
paren electric uniquify ediff-hook vc-hooks lisp-float-type elisp-mode
mwheel term/pgtk-win pgtk-win term/common-win pgtk-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
dynamic-setting system-font-setting font-render-setting cairo gtk pgtk
lcms2 multi-tty make-network-process emacs)
Memory information:
((conses 16 79793 9821)
(symbols 48 8916 0)
(strings 32 24608 1742)
(string-bytes 1 726991)
(vectors 16 15021)
(vector-slots 8 205006 15892)
(floats 8 51 33)
(intervals 56 542 0)
(buffers 984 13))