From 4efa40d7cda4537e42adaa0dbd70097886d2c91c Mon Sep 17 00:00:00 2001
From: Muxi Yan <mxyan@google.com>
Date: Sat, 20 Oct 2018 10:06:07 -0700
Subject: [PATCH] Validate parameters of GRPCChannelConfiguration:initWithHost:

---
 src/objective-c/GRPCClient/private/GRPCChannelPool.m | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/objective-c/GRPCClient/private/GRPCChannelPool.m b/src/objective-c/GRPCClient/private/GRPCChannelPool.m
index 8e0f6976cf9..80fa9c9151f 100644
--- a/src/objective-c/GRPCClient/private/GRPCChannelPool.m
+++ b/src/objective-c/GRPCClient/private/GRPCChannelPool.m
@@ -35,6 +35,8 @@ extern const char *kCFStreamVarName;
 @implementation GRPCChannelConfiguration
 
 - (nullable instancetype)initWithHost:(NSString *)host callOptions:(GRPCCallOptions *)callOptions {
+  NSAssert(host.length, @"Host must not be empty.");
+  NSAssert(callOptions, @"callOptions must not be empty.");
   if ((self = [super init])) {
     _host = [host copy];
     _callOptions = [callOptions copy];