From f693015be62a6571e053e15040664d01a450c0e0 Mon Sep 17 00:00:00 2001
From: Marcel van Lohuizen <mpvl@golang.org>
Date: Fri, 18 Mar 2016 17:16:56 +0100
Subject: [PATCH] sync: don't assume b.N > 0

Change-Id: I6eb91ea73ef887b025e5a8de1dd55f30618e1aa6
Reviewed-on: https://go-review.googlesource.com/20857
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
---
 src/sync/runtime_sema_test.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/sync/runtime_sema_test.go b/src/sync/runtime_sema_test.go
index 5b7dd3df3f..a2382f4655 100644
--- a/src/sync/runtime_sema_test.go
+++ b/src/sync/runtime_sema_test.go
@@ -25,6 +25,9 @@ func BenchmarkSemaUncontended(b *testing.B) {
 }
 
 func benchmarkSema(b *testing.B, block, work bool) {
+	if b.N == 0 {
+		return
+	}
 	sem := uint32(0)
 	if block {
 		done := make(chan bool)
-- 
2.48.1