From 5bf8746d0cb07fa655012dbea549a14ab771df3a Mon Sep 17 00:00:00 2001
From: Harpreet Sangar <happy_san@protonmail.com>
Date: Mon, 8 May 2023 13:38:18 +0530
Subject: [PATCH] Fix `HybridSearchRankFusionTest`.

---
 include/index.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/index.h b/include/index.h
index 3a511ba0..53c4c561 100644
--- a/include/index.h
+++ b/include/index.h
@@ -240,6 +240,10 @@ public:
     filter_result_iterator(filter_result_iterator) {}
 
     bool operator()(hnswlib::labeltype id) override {
+        if (filter_result_iterator->approx_filter_ids_length == 0) {
+            return true;
+        }
+
         filter_result_iterator->reset();
         return filter_result_iterator->valid(id) == 1;
     }