数据库插入语句的Bash脚本TUI不起作用。设置bash内置错误消息

我有以下bash脚本，该脚本提供Zentiy TUI来将数据插入数据库。

#!/bin/bash

    tip_run1="$(zenity --entry --text "ENTER number of tip runs:" --entry-text "1")"
     a=1

until
        [[ $tip_run1 -lt $a ]]
do
        input="$(zenity --forms --title="table tip_run" --text="Add a new tip run" --separator="," \
        --add-entry="ENTER start_time, e.g. 8:20: " \
        --add-entry="ENTER finish_time, e.g. 12:30: " \
        --add-entry="ENTER weight in kg, -t numeric: "\
    --add-entry="ENTER a note, -t text: ")"

psql -tA -U chh1 -d crewdb -c "SELECT SETVAL('tip_run_tip_runid_seq', (SELECT MAX(tip_runid) FROM tip_run), true);" >/dev/null 2>&1

startt="$(echo "$input" | awk -F, -v  OFS=, '{print $1}')"
finisht="$(echo "$input" | awk -F, -v  OFS=, '{print $2}')"

st="$( date --date="$startt" +%s  2>/dev/null )"
ft="$( date --date="$finisht" +%s 2>/dev/null )" 

if [ -n "$st" -a "$ft" ] ; then
    
    startt="$(date +%H:%M  -d "$startt"  )"
    finisht="$(date +%H:%M -d "$finisht" )"
    tzdiff="$(( ft - st ))"
else
    tzdiff=0
fi    

while [[  ( ( ! "$startt"   =~ ^[0-1][0-9]:[0-5][0-9]$ ) && ( ! "$startt"  =~ ^[0-2][0-3]:[0-5][0-9]$ ) ) || 
          ( ( ! "$finisht"  =~ ^[0-1][0-9]:[0-5][0-9]$ ) && ( ! "$finisht" =~ ^[0-2][0-3]:[0-5][0-9]$ ) ) || 
          ( "$tzdiff" -le 0 )  ]];
do
    var2="$(zenity --forms --title="start_time and/or finish_time are incorrect" --text "Add a start_time and a finish_time"  --separator="," \
                   --add-entry="WARNING! Something went wrong. Please enter a valid start_time, e.g. 8:20: " \
                   --add-entry="WARNING! Something went wrong. Please enter a valid finish_time, e.g. 12:30: ")"
    tzdiff=0
    
    if [ -n "$var2" ] ; then
       b1=$(echo "$var2" | cut -d, -f1 )
       b2=$(echo "$var2" | cut -d, -f2 )
       
       if [ -n "$b1" -a -n "$b2"  ] ; then
           tz1=$( date --date="$b1" +%s 2>/dev/null )
           tz2=$( date --date="$b2" +%s 2>/dev/null )
           
       if [ -n "$tz1" -a -n "$tz2" ] ; then
              startt=$(date +%H:%M -d "$b1" )
              finisht=$(date +%H:%M -d "$b2" )
              tzdiff=$(( tz2 - tz1 ))
           fi
       fi
    fi
done

var2="$startt,$finisht"

input="$( echo "$input" | awk -v vart="$var2" 'BEGIN {  FS="," } { print vart "," $3 "," $4 ; }' )"

input="$((IFS=, read -r  b c d e ; echo "${b}ttt,${c}ttt,${d}xxx,${e}www" )<<<"$input")"

IFS=,; set -f; set --$input; out=
for i in "$@"; do

        case "$i" in
                xxx) var2="$(zenity --forms --title="weight field in table tip_run" --text "Add a weight in kg"  --separator="," \
                                --add-entry="WARNING! You forgot to enter a weight. Please enter a valid weight, e.g. 12.5: ")"

                                until [[ ${var2} =~ ^[0-9]+([.][0-9]+)?$ ]] || [[ ${var2} = NULL ]]; do

                                        var2="$(zenity --forms --title="weight field in table tip_run" --text "Add a weight in kg"  --separator="," \
                                        --add-entry="WARNING! You either forgot to enter a weight or didn't enter a number. Please enter a valid weight, e.g. 12.5: ")"

                                done

                                out="$out,${var2}"                          
                                ;;
                
        NULLxxx) out="$out,${i/%xxx/}";;        
                *xxx) if [[ "${i/%xxx}" =~ ^[0-9]+([.][0-9]+)?$ ]]; then
            
            out="$out,${i/%xxx/}"
            
            else
                 until [[ ${var2} =~ ^[0-9]+([.][0-9]+)?$ ]] || [[ ${var2} = NULL ]]; do

                                        var2="$(zenity --forms --title="weight field in table tip_run" --text "Add a weight in kg"  --separator="," \
                                        --add-entry="WARNING! You either forgot to enter a weight or didn't enter a number. Please enter a valid weight, e.g. 12.5: ")"

                                done

                                out="$out,${var2}"
            fi
                                ;;
        *ttt) out="$out,'${i/%ttt/}:00'";;
                #TRUEbool) out="$out,${i/%bool/}";;
                #FALSEbool) out="$out,${i/%bool/}";;
                #*bool) echo "empty input not allowed"; exit 0;;
        NULLwww) out="$out,${i/%www/}";;
        www)            var2="$(zenity --forms --title="note field in table tip_run" --text "Add a note"  --separator="," \
                                --add-entry="WARNING! You either forgot to enter a note. Please enter a note or NULL: ")"

                                until [[ ! ${var2} = ""  ]]; do

                                        var2="$(zenity --forms --title="note field in table tip_run" --text "Add a note"  --separator="," \
                                        --add-entry="WARNING! You either forgot to enter a note or to enter NULL. Please enter a note or NULL: ")"

                                done
                
                if [[ ${var2} = "NULL"  ]]; then
                    out="$out,${var2}"
                else

                out="$out,\$\$${var2}\$\$"
                fi;;

        *www) out="$out,\$\$${i/%www/}\$\$";;
esac;
done

#echo "${out:1}"

echo "" >> /tmp/crew.txt
echo "" >> /tmp/crew.txt
echo "-- INSERT INTO tip_run:"  >> /tmp/crew.txt
echo "INSERT INTO tip_run (date_linkid, start_time, finish_time, weight, note) VALUES (${out:1});" >> /tmp/crew.txt

let a++

done

我知道脚本的各个组成部分都可以工作，但是当我运行它时，会收到以下错误消息：

./tip_run.txt: line 64: set: --: invalid option
set: usage: set [-abefhkmnptuvxBCHP] [-o option-name] [--] [arg ...]

第64行位于以下位置：

 62 input="$((IFS=, read -r  b c d e ; echo "${b}ttt,${c}ttt,${d}xxx,${e}www" )<    <<"$input")"
 63 
 64 IFS=,; set -f; set --$input; out=
 65 for i in "$@"; do
 66 
 67         case "$i" in

我尝试过设置不同的选项，但似乎都没有用。有人可以让我走上正确的道路吗？