Hi:
SolrIndexSearcher.getDocListNC and getDocListAndSetNC code snippet:
if (cmd.getSort() != null && query instanceof RankQuery == false &&
(cmd.getFlags() & GET_SCORES) != 0) {
TopFieldCollector.populateScores(topDocs.scoreDocs, this, query);
}
When this query includes a filterQuery, `QueryUtils.combineQueryAndFilter` will
build A new BooleanQuery and copy it to the Query object。
so `query instanceof RankQuery` is false, This causes the score to be lost in
the RankQuery phase.
Can you change this to determine if the original query is RankQuery:
`cmd.getQuery() instanceof RankQuery`.
version 8.6.*, 9.*
