fthevenet commented on PR #12212:
URL: https://github.com/apache/lucene/pull/12212#issuecomment-1488527286

   OK, so I dug a little deeper in what happens in the failing instance of the 
random test.
   It fails because of an ÌllegalArgumentException` thrown by 
`TopFieldCollector::populateScores` at line 552
   
https://github.com/apache/lucene/blob/b84b360f588c60e2ebdcaa2ce2e6d49f99dd9deb/lucene/core/src/java/org/apache/lucene/search/TopFieldCollector.java#L526-L556
   
   But the reason it does not fail before my fix is that in this case the 
search returns no docs in the first place (which was the tell sign of the 
underlying issue that got me started on it) and therefore never goes into the 
code path that throws.
   So at this stage, I can't tell if the fix is incorrect and the root cause 
for this particular failure or if it is just surfacing another problem 
somewhere else, by virtue of having fixed stuff...
   


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