From f95835d613ce45e50822b54be330514ecd900dac Mon Sep 17 00:00:00 2001
From: Nick Craig-Wood <nick@craig-wood.com>
Date: Thu, 3 May 2018 14:46:20 +0100
Subject: [PATCH] fserrors: Look deeper into errors for Fatal/Retry/NoRetry
 errors.

Before this change fatal errors which were wrapped in a system error (eg a
URLError) were not recognised as fatal errors.
---
 fs/fserrors/error.go | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/fs/fserrors/error.go b/fs/fserrors/error.go
index e9ebbcb0e..556ccb398 100644
--- a/fs/fserrors/error.go
+++ b/fs/fserrors/error.go
@@ -69,7 +69,7 @@ func IsRetryError(err error) bool {
 	if err == nil {
 		return false
 	}
-	err = errors.Cause(err)
+	_, err = Cause(err)
 	if r, ok := err.(Retrier); ok {
 		return r.Retry()
 	}
@@ -114,7 +114,7 @@ func IsFatalError(err error) bool {
 	if err == nil {
 		return false
 	}
-	err = errors.Cause(err)
+	_, err = Cause(err)
 	if r, ok := err.(Fataler); ok {
 		return r.Fatal()
 	}
@@ -159,7 +159,7 @@ func IsNoRetryError(err error) bool {
 	if err == nil {
 		return false
 	}
-	err = errors.Cause(err)
+	_, err = Cause(err)
 	if r, ok := err.(NoRetrier); ok {
 		return r.NoRetry()
 	}