 --> [ local path prefix ]/state_machine/redef/type.fpp:3:8
  |
3 |   type T
  |        ^ redefinition of symbol T
  |
 ::: [ local path prefix ]/state_machine/redef/type.fpp:2:3
  |
2 |   type T
  |   ------ previous definition is here

 --> [ local path prefix ]/state_machine/redef/type.fpp:1:15
  |
1 | state machine SM {
  |               ^^ state machine must have initial transition

