ChrisHegarty opened a new pull request, #14522:
URL: https://github.com/apache/lucene/pull/14522
Fix `DISIDocIdStream::count` so that it does not try to count beyond max.
From the perspective of DISIDocIdStream it should not be necessary to check
the iterator position before calling `count`.
Without this fix, `DISIDocIdStream::count` can easily fail with IOOBE, e.g.
```
Range [0, -5) out of bounds for length 100
java.lang.IndexOutOfBoundsException: Range [0, -5) out of bounds for length
100
at
__randomizedtesting.SeedInfo.seed([1667A192A4675B09:1A4E2A88F38511BB]:0)
at
java.base/jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:100)
at
java.base/jdk.internal.util.Preconditions.outOfBoundsCheckFromToIndex(Preconditions.java:112)
at
java.base/jdk.internal.util.Preconditions.checkFromToIndex(Preconditions.java:349)
at java.base/java.util.Objects.checkFromToIndex(Objects.java:391)
at org.apache.lucene.util.FixedBitSet.cardinality(FixedBitSet.java:212)
at
org.apache.lucene.search.DISIDocIdStream.count(DISIDocIdStream.java:63)
at org.apache.lucene.search.DocIdStream.count(DocIdStream.java:50)
at
org.apache.lucene.search.TestDISIDocIdStream.testCountUpTo2(TestDISIDocIdStream.java:131)
at
java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.base/java.lang.reflect.Method.invoke(Method.java:580)
```
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