From c6b844977ae55fd2b1223a167f25839753b7d78a Mon Sep 17 00:00:00 2001
From: Nick Craig-Wood <nick@craig-wood.com>
Date: Mon, 7 Aug 2017 17:36:59 +0100
Subject: [PATCH] sftp: clear the cached hashes on object update

---
 sftp/sftp.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sftp/sftp.go b/sftp/sftp.go
index 6e0fd8865..837d4cd89 100644
--- a/sftp/sftp.go
+++ b/sftp/sftp.go
@@ -817,6 +817,9 @@ func (o *Object) Open(options ...fs.OpenOption) (in io.ReadCloser, err error) {
 
 // Update a remote sftp file using the data <in> and ModTime from <src>
 func (o *Object) Update(in io.Reader, src fs.ObjectInfo, options ...fs.OpenOption) error {
+	// Clear the hash cache since we are about to update the object
+	o.md5sum = nil
+	o.sha1sum = nil
 	c, err := o.fs.getSftpConnection()
 	if err != nil {
 		return errors.Wrap(err, "Update")