filter with wrong constant results in nullpointerexception in function instead of error message
select ?s ?o ?t where ?s <rdf:type> ?o ?t filter LGreaterEqual ?t "0"^^xsd:long
instead of
select ?s ?o ?t where ?s <rdf:type> ?o ?t filter LGreaterEqual ?t "0"^^<xsd:long>
--> NullPointerException