This command is invalid because players don't have a horse.14 slot (it's slot 514). Spyglass currently doesn't warn for this, but it could in cases where information about the selector's entity type is known.
It's questionable whether slots that only differ semantically should produce an warning (like using contents instead of hotbar.0 for a player). I would vote yes
This command is invalid because players don't have a
horse.14
slot (it's slot 514). Spyglass currently doesn't warn for this, but it could in cases where information about the selector's entity type is known.It's questionable whether slots that only differ semantically should produce an warning (like using
contents
instead ofhotbar.0
for a player). I would vote yes