  --> [ local path prefix ]/tlm_packets/duplicate_packet_name.fpp:11:12
   |
11 |     packet P group 1 {
   |            ^ duplicate packet name P
   |
  ::: [ local path prefix ]/tlm_packets/duplicate_packet_name.fpp:7:12
   |
 7 |     packet P group 0 {
   |            - previous occurrence is here

