error: State1 + Event1: [guard()] : guarded transition is unreachable because it follows an unguarded transition, which handles all cases
  --> tests/compile-fail/guarded_transition_after_unguarded.rs:5:1
   |
5  | / statemachine! {
6  | |     transitions: {
7  | |         State1 + Event1 = Fault,
8  | |         *State1 + Event1 [guard] = State2,
9  | |     }
10 | | }
   | |_^
   |
   = note: this error originates in the macro `statemachine` (in Nightly builds, run with -Z macro-backtrace for more info)