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NotMaterializedException on Blazegraph 2.0
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This query:

prefix pr: <>
PREFIX wd: <>
PREFIX wdt: <>
PREFIX wikibase: <>
PREFIX p: <>
PREFIX v: <>
PREFIX q: <>
PREFIX rdfs: <>
PREFIX prov: <> 

SELECT ?work ?workLabel ?author ?authorLabel ?genre ?location ?locationLabel ?geo ?location_statement ?citat  WHERE {
  ?work wdt:P31/wdt:P279* wd:Q386724 . 
  ?work wdt:P50 ?author .
  ?work p:P840 ?location_statement .
  ?location_statement v:P840 ?location .
  ?location wdt:P17 wd:Q35 .
  ?location wdt:P625 ?geo . 
    ?location_statement prov:wasDerivedFrom ?ref .
    ?ref pr:P1683 ?citat .
} ORDER BY ?work ?author

causes NotMaterializedException in Blazegraph 2.0. See also

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Also reproducible on test machine with:

PREFIX wdt: <>

SELECT ?work ?author WHERE {
  ?work wdt:P50 ?author .
} ORDER BY ?work ?author LIMIT 10