From f26abc89a6357e6ebb89ab9a367f451bf82d9c74 Mon Sep 17 00:00:00 2001
From: Nick Craig-Wood <nick@craig-wood.com>
Date: Fri, 19 Nov 2021 17:07:57 +0000
Subject: [PATCH] union: fix treatment of remotes with // in

See: https://forum.rclone.org/t/connection-string-with-union-backend-and-a-lot-of-quotes/27577
---
 backend/union/upstream/upstream.go | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/backend/union/upstream/upstream.go b/backend/union/upstream/upstream.go
index 93b8ae521..86575c512 100644
--- a/backend/union/upstream/upstream.go
+++ b/backend/union/upstream/upstream.go
@@ -6,8 +6,6 @@ import (
 	"fmt"
 	"io"
 	"math"
-	"path"
-	"path/filepath"
 	"strings"
 	"sync"
 	"sync/atomic"
@@ -91,7 +89,7 @@ func New(ctx context.Context, remote, root string, cacheTime time.Duration) (*Fs
 		return nil, err
 	}
 	f.RootFs = rFs
-	rootString := path.Join(remote, filepath.ToSlash(root))
+	rootString := fspath.JoinRootPath(remote, root)
 	myFs, err := cache.Get(ctx, rootString)
 	if err != nil && err != fs.ErrorIsFile {
 		return nil, err