From 299c8e0161960db39385e50f364834dd02e8ded7 Mon Sep 17 00:00:00 2001
From: deadbeef <deadbeef@webrtc.org>
Date: Fri, 5 May 2017 10:00:18 -0700
Subject: [PATCH] When a data channel fails to be created, return nil instead
 of crashing.

BUG=webrtc:4619

Review-Url: https://codereview.webrtc.org/2860353002
Cr-Commit-Position: refs/heads/master@{#18034}
---
 .../objc/Framework/Classes/RTCPeerConnection+DataChannel.mm    | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/webrtc/sdk/objc/Framework/Classes/RTCPeerConnection+DataChannel.mm b/webrtc/sdk/objc/Framework/Classes/RTCPeerConnection+DataChannel.mm
index b3825d4e4e..80b510898c 100644
--- a/webrtc/sdk/objc/Framework/Classes/RTCPeerConnection+DataChannel.mm
+++ b/webrtc/sdk/objc/Framework/Classes/RTCPeerConnection+DataChannel.mm
@@ -25,6 +25,9 @@
   rtc::scoped_refptr<webrtc::DataChannelInterface> dataChannel =
       self.nativePeerConnection->CreateDataChannel(labelString,
                                                    &nativeInit);
+  if (!dataChannel) {
+    return nil;
+  }
   return [[RTCDataChannel alloc] initWithNativeDataChannel:dataChannel];
 }