From 625a1ca8fa44b385a903d485293803612c73e4fc Mon Sep 17 00:00:00 2001
From: Grace Do <xgrace@gmail.com>
Date: Fri, 9 Nov 2018 10:59:33 -0800
Subject: [PATCH] Use fieldsCopy in testutil.Accumulator AddFields (#4970)

---
 testutil/accumulator.go | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/testutil/accumulator.go b/testutil/accumulator.go
index c13f02ab3..65c8883e0 100644
--- a/testutil/accumulator.go
+++ b/testutil/accumulator.go
@@ -83,6 +83,10 @@ func (a *Accumulator) AddFields(
 		return
 	}
 
+	if len(fields) == 0 {
+		return
+	}
+
 	tagsCopy := map[string]string{}
 	for k, v := range tags {
 		tagsCopy[k] = v
@@ -93,10 +97,6 @@ func (a *Accumulator) AddFields(
 		fieldsCopy[k] = v
 	}
 
-	if len(fields) == 0 {
-		return
-	}
-
 	var t time.Time
 	if len(timestamp) > 0 {
 		t = timestamp[0]
@@ -114,7 +114,7 @@ func (a *Accumulator) AddFields(
 
 	p := &Metric{
 		Measurement: measurement,
-		Fields:      fields,
+		Fields:      fieldsCopy,
 		Tags:        tagsCopy,
 		Time:        t,
 	}