tikv-fail: change addr arg to required
addr arg is required now,or it will just show a unwrap error msg
@@ -49,6 +49,7 @@ fn main() {
.about("A tool for injecting failures to TiKV and recovery")
.arg(
Arg::with_name("addr")
+ .required(true)
.short("a")
.takes_value(true)
.help("set tikv ip:port"),
