From c11aa1c8924dfae85847002dea081efb62ea23b4 Mon Sep 17 00:00:00 2001
From: "Anand Babu (AB) Periasamy" <ab@minio.io>
Date: Mon, 24 Aug 2015 03:35:24 -0700
Subject: [PATCH] return *probe.Error for Untrace() as well.

---
 pkg/probe/probe.go | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/pkg/probe/probe.go b/pkg/probe/probe.go
index a7872a8a0..5a30c3196 100644
--- a/pkg/probe/probe.go
+++ b/pkg/probe/probe.go
@@ -108,18 +108,19 @@ func (e *Error) trace(fields ...string) *Error {
 }
 
 // Untrace erases last trace entry.
-func (e *Error) Untrace() {
+func (e *Error) Untrace() *Error {
 	if e == nil {
-		return
+		return nil
 	}
 	e.lock.Lock()
 	defer e.lock.Unlock()
 
 	l := len(e.CallTrace)
 	if l == 0 {
-		return
+		return nil
 	}
 	e.CallTrace = e.CallTrace[:l-1]
+	return e
 }
 
 // ToGoError returns original error message.