From 84e9934bf9143076fba5cbe0e2251a6628576202 Mon Sep 17 00:00:00 2001
From: chrislu <chris.lu@gmail.com>
Date: Wed, 1 Feb 2023 20:44:00 -0800
Subject: [PATCH] fix filer.remote.sync on a S3 cloud mount

fix https://github.com/seaweedfs/seaweedfs/issues/4175
---
 weed/filer/stream.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/weed/filer/stream.go b/weed/filer/stream.go
index d23a1aeab..dba1dc908 100644
--- a/weed/filer/stream.go
+++ b/weed/filer/stream.go
@@ -300,6 +300,9 @@ func (c *ChunkStreamReader) prepareBufferFor(offset int64) (err error) {
 	if c.bufferOffset <= offset && offset < c.bufferOffset+int64(len(c.buffer)) {
 		return nil
 	}
+	if c.chunkView == nil {
+		return io.EOF
+	}
 
 	// fmt.Printf("fetch for offset %d\n", offset)
 	c.chunkView = c.chunkView.Next