From 8c839e839b3624c9953b11b9a59b04276f40a0b9 Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Tue, 12 Apr 2016 15:12:08 -0700
Subject: [PATCH] check for histogramParams presence

---
 src/csharp/Grpc.IntegrationTesting/ClientRunners.cs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/csharp/Grpc.IntegrationTesting/ClientRunners.cs b/src/csharp/Grpc.IntegrationTesting/ClientRunners.cs
index f954ca5f34c..b4572756f24 100644
--- a/src/csharp/Grpc.IntegrationTesting/ClientRunners.cs
+++ b/src/csharp/Grpc.IntegrationTesting/ClientRunners.cs
@@ -129,6 +129,7 @@ namespace Grpc.IntegrationTesting
         public ClientRunnerImpl(List<Channel> channels, ClientType clientType, RpcType rpcType, int outstandingRpcsPerChannel, LoadParams loadParams, PayloadConfig payloadConfig, HistogramParams histogramParams)
         {
             GrpcPreconditions.CheckArgument(outstandingRpcsPerChannel > 0, "outstandingRpcsPerChannel");
+            GrpcPreconditions.CheckNotNull(histogramParams, "histogramParams");
             this.channels = new List<Channel>(channels);
             this.clientType = clientType;
             this.rpcType = rpcType;