ql:has-relation segfaults with COUNT

[niklas88]

On the Clueweb Freebase (built with a version before the latest ql:has-predicate renaming) corpus running with the latest master QLever the following query results in a SEGFAULT

PREFIX fb: <http://rdf.freebase.com/ns/>
SELECT ?predicate (COUNT(?predicate) as ?count) WHERE {
 ?person fb:people.person.profession ?profession .
 ?profession fb:type.object.name "Astronaut"@en .
 ?person ql:has-predicate ?predicate .
}
GROUP BY ?predicate
ORDER BY ?count

However removing the COUNT the following query works

PREFIX fb: <http://rdf.freebase.com/ns/>
SELECT ?predicate WHERE {
 ?person fb:people.person.profession ?profession .
 ?profession fb:type.object.name "Astronaut"@en .
 ?person ql:has-predicate ?predicate .
}

And also restricting just by fb:type.object.type works:

PREFIX fb: <http://rdf.freebase.com/ns/>
SELECT ?predicate (COUNT(?predicate) as ?count) WHERE {
 ?person fb:type.object.type fb:people.person .
 ?person ql:has-predicate ?predicate .
}
GROUP BY ?predicate
ORDER BY ?count

The log output is as follows
qlever_crash_log_count_has_predicate.txt

[floriankramer]

This seems to have been closed by #118.