From c5775cf73d0e993625a688454ae158335aac6e94 Mon Sep 17 00:00:00 2001
From: Nick Craig-Wood <nick@craig-wood.com>
Date: Tue, 26 Feb 2019 15:26:12 +0000
Subject: [PATCH] fserrors: don't panic on uncomparable errors

---
 fs/fserrors/error.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/fserrors/error.go b/fs/fserrors/error.go
index a2ede7416..39fd9fb64 100644
--- a/fs/fserrors/error.go
+++ b/fs/fserrors/error.go
@@ -194,7 +194,7 @@ func Cause(cause error) (retriable bool, err error) {
 			// this case.
 			err = prev
 		}
-		if err == prev {
+		if reflect.DeepEqual(err, prev) {
 			// Unpack any struct or *struct with a field
 			// of name Err which satisfies the error
 			// interface.  This includes *url.Error,
@@ -215,7 +215,7 @@ func Cause(cause error) (retriable bool, err error) {
 				}
 			}
 		}
-		if err == prev {
+		if reflect.DeepEqual(err, prev) {
 			break
 		}
 	}