Adrien Grand created LUCENE-8658:
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Summary: Illegal assertion in WANDScorer
Key: LUCENE-8658
URL: https://issues.apache.org/jira/browse/LUCENE-8658
Project: Lucene - Core
Issue Type: Bug
Reporter: Adrien Grand
[~jim.ferenczi] told me about an assertion error that he ran into while playing
with WANDScorer.
WANDScorer tries to not have to deal with accuracy issues on floating-point
numbers. In order to do this, it turns all scores into integers by multiplying
them by a scaling factor, and then rounding minimum competitive scores down and
rounding maximum scores up. This scaling factor is computed in the constructor
in such a way that scores end up in the 0..65536 range. Sub scorers that have a
maximum score of +Infty are ignored.
The assertion is triggered in the rare case that a Scorer returns +Infty for
its maximum score when computing the scaling factor but then returns finite
values that are greater than the maximum scores of other clauses when asked for
the maximum score over smaller ranges of doc ids.
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