From c99920070c4efd95388320fc1e00d999e0161b94 Mon Sep 17 00:00:00 2001
From: risk danger olson <technoweenie@gmail.com>
Date: Thu, 18 Aug 2016 15:55:44 -0600
Subject: [PATCH] errors: implement fmt.Formatter

---
 errors/errors.go | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/errors/errors.go b/errors/errors.go
index 07c7f015..3353c36b 100644
--- a/errors/errors.go
+++ b/errors/errors.go
@@ -86,8 +86,10 @@ func Wrapf(err error, format string, args ...interface{}) error {
 }
 
 type errorWithCause interface {
-	Error() string
 	Cause() error
+	StackTrace() errors.StackTrace
+	error
+	fmt.Formatter
 }
 
 func parentOf(err error) error {