[Wikidata-bugs] [Maniphest] [Commented On] T212084: wikibase:mwapi query returns empty objects

[Vort]

Vort added a comment.

Bug with Q59641456 (part two) is not reproducing anymore.
But empty values still can be seen with such request (part one):

SELECT ?item ?title WHERE {
  SERVICE wikibase:mwapi {
    bd:serviceParam wikibase:endpoint "ru.wikipedia.org" .
    bd:serviceParam wikibase:api "Generator" .
    bd:serviceParam mwapi:generator "search" .
    bd:serviceParam mwapi:gsrsearch "intitle:/Дом[-]музей [БК]о/" .
    bd:serviceParam mwapi:gsrlimit "max" .
    ?item wikibase:apiOutputItem mwapi:item .
    ?title wikibase:apiOutput mwapi:title
  }
}

They becomes a problem when I want to fetch sitelinks (result is query timeout or browser tab crash):

SELECT ?item ?lang WHERE {
  SERVICE wikibase:mwapi {
    bd:serviceParam wikibase:endpoint "ru.wikipedia.org" .
    bd:serviceParam wikibase:api "Generator" .
    bd:serviceParam mwapi:generator "search" .
    bd:serviceParam mwapi:gsrsearch "intitle:/Дом[-]музей [БК]о/" .
    bd:serviceParam mwapi:gsrlimit "max" .
    ?item wikibase:apiOutputItem mwapi:item .
  }
  ?sitelink schema:about ?item .
  ?sitelink schema:inLanguage ?lang
}

But I'm not sure if such behavior is wrong.

TASK DETAIL

https://phabricator.wikimedia.org/T212084

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To: Vort
Cc: Smalyshev, Aklapper, Vort, Nandana, Lahi, Gq86, Lucas_Werkmeister_WMDE, GoranSMilovanovic, QZanden, EBjune, merbst, LawExplorer, _jensen, D3r1ck01, Jonas, Xmlizer, jkroll, Wikidata-bugs, Jdouglas, aude, Tobias1984, Manybubbles, Mbch331

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