Assertion `meta_.col0IdExists(col0Id)` failed

[hannahbast]

The error message from the title is triggered by the following query on PubChem. This might be related to the recent #1263. Note that substance:SID46505803 exists, yet no triples match the query body.

PREFIX substance: <http://rdf.ncbi.nlm.nih.gov/pubchem/substance/>
SELECT ?predicate (COUNT(?subject) AS ?count) WHERE {
  ?subject ?predicate substance:SID46505803
} GROUP BY ?predicate

Try it on QLever

Full error message:

Assertion `meta_.col0IdExists(col0Id)` failed. Please report this to the developers. In file "/local/data/qlever/qlever-code/src/index/Permutation.cpp " at line 78.

[joka921]

How old is our Pubchem Index? Can you update it and check whether this still appears on the latest master. We have changed so much in the last two months, I make sure that we haven't "accidentally" fixed this. I have trouble reproducing it on a smaller knowledge graph at the moment.