the serial terminal key is invalid or stuck

When the tty is /dev/ttyS0, readline gets the term width as 0 (stty size output is 0 0), resulting in invalid tab and infinite loop of arrow keys

w return is 0

readline/utils_unix.go

Lines 39 to 45 in 7f93d88

    
           func GetScreenWidth() int { 
        
           	w := getWidth(syscall.Stdout) 
        
           	if w < 0 { 
        
           		w = getWidth(syscall.Stderr) 
        
           	} 
        
           	return w 
        
           }

	func GetScreenWidth() int {
	w := getWidth(syscall.Stdout)
	if w < 0 {
	w = getWidth(syscall.Stderr)
	}
	return w
	}