From 19a5dde0efb38c90d14c012a639071423145b58f Mon Sep 17 00:00:00 2001
From: yys <sw.yunsuk@gmail.com>
Date: Wed, 1 Dec 2021 18:55:02 +0900
Subject: [PATCH] change RLock to Lock for MutableTree.VersionExists (#448)

---
 mutable_tree.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mutable_tree.go b/mutable_tree.go
index 764467089..fb891fca2 100644
--- a/mutable_tree.go
+++ b/mutable_tree.go
@@ -62,8 +62,8 @@ func (tree *MutableTree) IsEmpty() bool {
 
 // VersionExists returns whether or not a version exists.
 func (tree *MutableTree) VersionExists(version int64) bool {
-	tree.mtx.RLock()
-	defer tree.mtx.RUnlock()
+	tree.mtx.Lock()
+	defer tree.mtx.Unlock()
 
 	if tree.allRootLoaded {
 		return tree.versions[version]