fix: extend parentDirIsObject for all parents

cmd/erasure-sets.go

@@ -24,6 +24,7 @@ import (
 	"io"
 	"math/rand"
 	"net/http"
+	"path"
 	"sort"
 	"sync"
 	"time"
@@ -755,7 +756,19 @@ func (s *erasureSets) GetObject(ctx context.Context, bucket, object string, star
 }
 
 func (s *erasureSets) parentDirIsObject(ctx context.Context, bucket, parent string) bool {
-	return s.getHashedSet(parent).parentDirIsObject(ctx, bucket, parent)
+	var isParentDirObject func(string) bool
+	isParentDirObject = func(p string) bool {
+		if p == "." || p == SlashSeparator {
+			return false
+		}
+		if s.getHashedSet(p).isObject(ctx, bucket, p) {
+			// If there is already a file at prefix "p", return true.
+			return true
+		}
+		// Check if there is a file as one of the parent paths.
+		return isParentDirObject(path.Dir(p))
+	}
+	return isParentDirObject(parent)
 }
 
 // PutObject - writes an object to hashedSet based on the object name.