From c41b6f7c53f7f9737a9ef7edc730c72ae98f9203 Mon Sep 17 00:00:00 2001
From: Denis Dyakov <denis.dyakov@gmail.com>
Date: Fri, 13 Mar 2020 23:40:49 +0600
Subject: [PATCH] Fix unexpected delete bucket error

---
 bucket.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/bucket.go b/bucket.go
index f889684..e3e7fbc 100644
--- a/bucket.go
+++ b/bucket.go
@@ -228,7 +228,7 @@ func (b *Bucket) DeleteBucket(key []byte) error {
 	// Recursively delete all child buckets.
 	child := b.Bucket(key)
 	err := child.ForEach(func(k, v []byte) error {
-		if v == nil {
+		if _, _, childFlags := child.Cursor().seek(k); (childFlags & bucketLeafFlag) != 0 {
 			if err := child.DeleteBucket(k); err != nil {
 				return fmt.Errorf("delete bucket: %s", err)
 			}