From bfe1a69fd7c2ed9ceba03b67bcf8a511df05c7f8 Mon Sep 17 00:00:00 2001
From: Tanuj Nayak <tanujnay112@live.com>
Date: Tue, 26 Aug 2025 16:18:59 -0700
Subject: [PATCH] [BUG]: Allow HnswDataBuilder to take in an empty link list
 buffer

---
 src/hnsw.rs | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/src/hnsw.rs b/src/hnsw.rs
index 5d6f13d72..3ee01202e 100644
--- a/src/hnsw.rs
+++ b/src/hnsw.rs
@@ -557,9 +557,8 @@ impl HnswDataBuilder {
         if self.length_buffer.as_ref().unwrap().is_empty() {
             return Err(HnswError::ErrorHnswData("Length buffer cannot be empty".to_string()));
         }
-        if self.link_list_buffer.as_ref().unwrap().is_empty() {
-            return Err(HnswError::ErrorHnswData("Link list buffer cannot be empty".to_string()));
-        }
+
+        // It's ok for link list buffer to be empty in an empty index.
 
         Ok(())
     }