  --> [ local path prefix ]/port_numbering/missing_connection.fpp:28:5
   |
28 |     c1.pOut -> c2.pIn
   |     ^^^^^^^ no match for this connection
   |
  ::: [ local path prefix ]/port_numbering/missing_connection.fpp:8:3
   |
 8 |   match pIn with pOut
   |   ------------------- port matching is specified here

