From fcb01d47048811ddabad549e230d8f05c0e7c315 Mon Sep 17 00:00:00 2001
From: Alex Chi <iskyzh@gmail.com>
Date: Mon, 5 Feb 2024 12:49:07 +0800
Subject: [PATCH] sync starter code with refsol on MergeIterator

Signed-off-by: Alex Chi <iskyzh@gmail.com>
---
 mini-lsm-starter/src/iterators/merge_iterator.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mini-lsm-starter/src/iterators/merge_iterator.rs b/mini-lsm-starter/src/iterators/merge_iterator.rs
index a3e911d..04eca06 100644
--- a/mini-lsm-starter/src/iterators/merge_iterator.rs
+++ b/mini-lsm-starter/src/iterators/merge_iterator.rs
@@ -42,7 +42,7 @@ impl<I: StorageIterator> Ord for HeapWrapper<I> {
 /// iterators, perfer the one with smaller index.
 pub struct MergeIterator<I: StorageIterator> {
     iters: BinaryHeap<HeapWrapper<I>>,
-    current: HeapWrapper<I>,
+    current: Option<HeapWrapper<I>>,
 }
 
 impl<I: StorageIterator> MergeIterator<I> {