I'm build triceratops, and its TTL file doesn't declare lv2:requiredFeature urid:map. When I try to run lv2lint on it (the plugin is in the lv2 subdir), lv2lint prints out the following and then just hangs, maxing out a CPU with 100%:

$ LV2_PATH="$PWD/lv2:/usr/lib/lv2" lv2lint -M pack http://nickbailey.co.nr/triceratops lv2lint 0.17.1 Copyright (c) 2016-2021 Hanspeter Portner (dev@open-music-kontrollers.ch) Released under Artistic License 2.0 by Open Music Kontrollers http://nickbailey.co.nr/triceratops

Missing feature urid:map.

lv2lint 0.17.1 on Manjaro Linux using the official package (AUR -git version behaves the same).