server example: "entered unreachable code"

[omrischwarz]

➜ modbus_utils git:(feature/async-server) ✗ RUST_BACKTRACE=full ./target/debug/modbus_sim --socketaddr=0.0.0.0:1502 src/config.json

Starting up server on 0.0.0.0:1502
thread 'main' panicked at src/main.rs:412:52:
internal error: entered unreachable code
stack backtrace:

Hi, I'm getting this error when I try to build and run the example TCP server. I think some changes in the asynchronous model for Tokio might be behind this.