Slackware 15 上的 ls 出现奇怪错误

Question

使用 ls 在 Slackware 15 上出现非常奇怪的错误让我们看看......

ls 是别名

alias ls
alias ls='/bin/ls $LS_OPTIONS'

ls返回错误

ls
/bin/ls: invalid option -- ' '

取消别名并且工作正常

unalias ls
ls

我做了源和错误返回

source.bashrc
ls
    /bin/ls: invalid option -- ' '

这是.bashrc

# Aliases
alias ldapsearch="ldapsearch -Y gssapi"
alias parallel="parallel --will-cite"
alias free="free -h"
alias wget="wget -c"
alias dmesg="dmesg -eT"
alias d='/bin/ls $LS_OPTIONS'
alias ls='/bin/ls $LS_OPTIONS'
alias rsync="rsync -avAXHhSP -e 'ssh -Y'"
alias at="at -m"

# Variables
export LS_OPTIONS="-F -b -T 0 --color=auto"
export LANG="it_IT.utf8"
export MINICOM="-c on"
export LESSOPEN="|lesspipe.sh %s"
export LESS="-M"
export HISTSIZE=5500
export HISTTIMEFORMAT="%d.%m.%Y %H:%M:%S "
export MAIL=/var/spool/mail/$USER
export EDITOR=vim
export COLUMNS=120
export NLS_LANG=Italian_ITALY.UTF8
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib:/usr/lib/oracle/12.2/client64/lib
export PATH=$PATH:/sbin:/usr/sbin:/bin:/usr/bin
export MBOX=$HOME/.mbox

# Binds
bind '"\C-f": forward-search-history'

如果我关闭 shell 并重新打开（运行新的 xfce4-terminal），错误就会消失并且 ls 工作正常。我使用 Xfce4 终端