问linux expect语言-脚本不适用于if语句

EN

#!/usr/bin/expect -f
set timeout -10
set prompt {$}

spawn  ssh 1.1.1.1
expect -re "$prompt"

send -- "echo 12\r"
expect { 
        "12" {send "echo hunky-dory\r"} 
        "bg" {send "echo 1\r"}
        "ih" {send "echo 2\r"}
        }
send -- "exit\r"
interact

expect version 5.45
argv[0] = /usr/bin/expect  argv[1] = -d  argv[2] = ./testexpect.exp  
set argc 0
set argv0 "./testexpect.exp"
set argv ""
executing commands from command file ./testexpect.exp
spawn ssh <hidden for security reasons>
parent: waiting for sync byte
parent: telling child to go ahead
parent: now unsynchronized from child
spawn: returns {3920}
send: sending "echo 12\r" to { exp4 }
expect: timed out
send: sending "exit\r" to { exp4 }
tty_raw_noecho: was raw = 0  echo = 1
spawn id exp4 sent <echo 12\r\nexit\r\n>
echo 12
exit