 --> [ local path prefix ]/state_machine/signal_uses/duplicate.fpp:6:8
  |
6 |     on s enter S
  |        ^ duplicate use of signal s in state S
  |
 ::: [ local path prefix ]/state_machine/signal_uses/duplicate.fpp:5:8
  |
5 |     on s enter S
  |        - previous use is here

