From 71a784cfa22cd4753950999b356c16231e4f6888 Mon Sep 17 00:00:00 2001
From: Nick Craig-Wood <nick@craig-wood.com>
Date: Wed, 16 Feb 2022 11:42:28 +0000
Subject: [PATCH] compress: fix crash if metadata upload failed - fixes #5994

Before this changed the backend attempted to delete a nil object if
the metadata upload failed.
---
 backend/compress/compress.go | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/backend/compress/compress.go b/backend/compress/compress.go
index c7b3a4006..fbd99ac9f 100644
--- a/backend/compress/compress.go
+++ b/backend/compress/compress.go
@@ -626,9 +626,11 @@ func (f *Fs) putMetadata(ctx context.Context, meta *ObjectMetadata, src fs.Objec
 	// Put the data
 	mo, err = put(ctx, metaReader, f.wrapInfo(src, makeMetadataName(src.Remote()), int64(len(data))), options...)
 	if err != nil {
-		removeErr := mo.Remove(ctx)
-		if removeErr != nil {
-			fs.Errorf(mo, "Failed to remove partially transferred object: %v", err)
+		if mo != nil {
+			removeErr := mo.Remove(ctx)
+			if removeErr != nil {
+				fs.Errorf(mo, "Failed to remove partially transferred object: %v", err)
+			}
 		}
 		return nil, err
 	}