Confusing error from ST_FromFlatGeoBuf

[strk]

Running this:

select st_fromflatgeobuf(NULL::int,NULL::bytea);

You get this:

ERROR: function returning record called in context that cannot accept type record

The error is very confusing and needlessly so, as the message is hard-coded in PostGIS itself: ​https://git.osgeo.org/gitea/postgis/postgis/src/tag/3.4.0/postgis/lwgeom_in_flatgeobuf.c#L176