Prevent underflow due to returning endid

1 files changed, 1 insertions, 1 deletions

diff --git a/searchcore/src/vespa/searchcore/proton/matching/match_thread.cpp b/searchcore/src/vespa/searchcore/proton/matching/match_thread.cpp
index 4822dc57669..c1c4387cf41 100644
--- a/searchcore/src/vespa/searchcore/proton/matching/match_thread.cpp
+++ b/searchcore/src/vespa/searchcore/proton/matching/match_thread.cpp
@@ -180,7 +180,7 @@ MatchThread::match_loop(MatchTools &tools, HitCollector &hits)
     {
         uint32_t lastCovered = inner_match_loop<Strategy, do_rank, do_limit, do_share_work>(context, tools, docid_range);
         softDoomed = (lastCovered < docid_range.end);
-        docsCovered += lastCovered - docid_range.begin;
+        docsCovered += std::min(lastCovered, docid_range.end) - docid_range.begin;
     }
     uint32_t matches = context.matches;
     if (do_limit && context.isBelowLimit()) {