Query without 'PREFIX' is endlessly waiting for a response

[graue70]

The following query gives the correct result fast:

PREFIX wd: <http://www.wikidata.org/entity/>
PREFIX wdt: <http://www.wikidata.org/prop/direct/>
SELECT ?o2 WHERE {
  wd:Q80728 ?p1 ?o1 .
  ?o1 wdt:P1477 ?o2 .
}

The following (semantically identical) query never finishes. It keeps 'Waiting for response':

SELECT ?o2 where {
  <http://www.wikidata.org/entity/Q80728> ?p1 ?o1 .
  ?o1 <http://www.wikidata.org/prop/direct/P1477> ?o2 .
}

The two entities are recognized correctly when hovering over them. (The same query works on wdqs.)
The console gives the following error message:

TypeError: /SELECT(?: DISTINCT)?([^]*)WHERE/.exec(...) is null qleverUI.js:257:63
    processQuery http://qlever.informatik.uni-freiburg.de/static/js/qleverUI.js:257

[hannahbast]

It's apparently a problem of the QLever UI and not of the backend. It works without problems if you paste it here (the direct access to the backend):

http://qlever.informatik.uni-freiburg.de/api/wikidata-full/index.html?query=SELECT%20%3Fo2%20where%20%7B%0A%20%20%3Chttp%3A%2F%2Fwww.wikidata.org%2Fentity%2FQ80728%3E%20%3Fp1%20%3Fo1%20.%0A%20%20%3Fo1%20%3Chttp%3A%2F%2Fwww.wikidata.org%2Fprop%2Fdirect%2FP1477%3E%20%3Fo2%20.%0A%7D&send=100

[hannahbast]

It also works in the QLever UI if you capitalize the WHERE:

SELECT ?o2 WHERE {
  <http://www.wikidata.org/entity/Q80728> ?p1 ?o1 .
  ?o1 <http://www.wikidata.org/prop/direct/P1477> ?o2 .
}

[hannahbast]

I have created an issue in the QLever UI project over here: ad-freiburg/qlever-ui#3

I am closing this issue because there is nothing wrong with the QLever backend with respect to this bug.