  --> [ local path prefix ]/port_numbering/duplicate_connection_at_matched_port.fpp:32:7
   |
32 |       c2.pOut -> c1.pIn[0]
   |       ^^^^^^^ duplicate connection at matched port pIn[0]
   |
  ::: [ local path prefix ]/port_numbering/duplicate_connection_at_matched_port.fpp:31:7
   |
31 |       c2.pOut -> c1.pIn[0]
   |       ------- previous occurrence is here
   |
  ::: [ local path prefix ]/port_numbering/duplicate_connection_at_matched_port.fpp:10:5
   |
10 |     match pOut with pIn
   |     ------------------- port matching is specified here

