Lucas_Werkmeister_WMDE added a comment.
It looks like the issue is just `SELECT DISTINCT` on sufficiently long strings of any kind. Query <https://query.wikidata.org/#SELECT%20DISTINCT%20%3Fa32768%20%7B%0A%20%20BIND%28%22a%22%20AS%20%3Fa1%29%0A%20%20BIND%28CONCAT%28%3Fa1%2C%20%3Fa1%29%20AS%20%3Fa2%29%0A%20%20BIND%28CONCAT%28%3Fa2%2C%20%3Fa2%29%20AS%20%3Fa4%29%0A%20%20BIND%28CONCAT%28%3Fa4%2C%20%3Fa4%29%20AS%20%3Fa8%29%0A%20%20BIND%28CONCAT%28%3Fa8%2C%20%3Fa8%29%20AS%20%3Fa16%29%0A%20%20BIND%28CONCAT%28%3Fa16%2C%20%3Fa16%29%20AS%20%3Fa32%29%0A%20%20BIND%28CONCAT%28%3Fa32%2C%20%3Fa32%29%20AS%20%3Fa64%29%0A%20%20BIND%28CONCAT%28%3Fa64%2C%20%3Fa64%29%20AS%20%3Fa128%29%0A%20%20BIND%28CONCAT%28%3Fa128%2C%20%3Fa128%29%20AS%20%3Fa256%29%0A%20%20BIND%28CONCAT%28%3Fa256%2C%20%3Fa256%29%20AS%20%3Fa512%29%0A%20%20BIND%28CONCAT%28%3Fa512%2C%20%3Fa512%29%20AS%20%3Fa1024%29%0A%20%20BIND%28CONCAT%28%3Fa1024%2C%20%3Fa1024%29%20AS%20%3Fa2048%29%0A%20%20BIND%28CONCAT%28%3Fa2048%2C%20%3Fa2048%29%20AS%20%3Fa4096%29%0A%20%20BIND%28CONCAT%28%3Fa4096%2C%20%3Fa4096%29%20AS%20%3Fa8192%29%0A%20%20BIND%28CONCAT%28%3Fa8192%2C%20%3Fa8192%29%20AS%20%3Fa16384%29%0A%20%20BIND%28CONCAT%28%3Fa16384%2C%20%3Fa16384%29%20AS%20%3Fa32768%29%0A%7D>: SELECT DISTINCT ?a32768 { BIND("a" AS ?a1) BIND(CONCAT(?a1, ?a1) AS ?a2) BIND(CONCAT(?a2, ?a2) AS ?a4) BIND(CONCAT(?a4, ?a4) AS ?a8) BIND(CONCAT(?a8, ?a8) AS ?a16) BIND(CONCAT(?a16, ?a16) AS ?a32) BIND(CONCAT(?a32, ?a32) AS ?a64) BIND(CONCAT(?a64, ?a64) AS ?a128) BIND(CONCAT(?a128, ?a128) AS ?a256) BIND(CONCAT(?a256, ?a256) AS ?a512) BIND(CONCAT(?a512, ?a512) AS ?a1024) BIND(CONCAT(?a1024, ?a1024) AS ?a2048) BIND(CONCAT(?a2048, ?a2048) AS ?a4096) BIND(CONCAT(?a4096, ?a4096) AS ?a8192) BIND(CONCAT(?a8192, ?a8192) AS ?a16384) BIND(CONCAT(?a16384, ?a16384) AS ?a32768) } With `SELECT ?a32768`, or with `SELECT DISTINCT ?a16384`, the query still works. TASK DETAIL https://phabricator.wikimedia.org/T292659 EMAIL PREFERENCES https://phabricator.wikimedia.org/settings/panel/emailpreferences/ To: Lucas_Werkmeister_WMDE Cc: Lucas_Werkmeister_WMDE, AdrianoRutz, Aklapper, Invadibot, MPhamWMF, maantietaja, CBogen, Akuckartz, Nandana, Namenlos314, Lahi, Gq86, GoranSMilovanovic, QZanden, EBjune, merbst, LawExplorer, _jensen, rosalieper, Scott_WUaS, Jonas, Xmlizer, jkroll, Wikidata-bugs, Jdouglas, aude, Tobias1984, Manybubbles, Mbch331
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