$ cargo run --example consensus-node -- -h
Finished dev [unoptimized + debuginfo] target(s) in 0.12s
Running `target/debug/examples/consensus-node -h`
thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: AddrParseError(())', libcore/result.rs:1009:5
note: Run with `RUST_BACKTRACE=1` for a backtrace.
This should print the help text instead: