error: No starting state defined, indicate the starting state with a *.
 --> $DIR/no_starting_state.rs:5:1
  |
5 | / statemachine! { //~ ERROR No starting state defined, indicate the starting state with a *
6 | |     State1 + Event1 = State2,
7 | |     State2 + Event2 = State3,
8 | | }
  | |_^
  |
  = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
