From 63cd77c835de2d0ea56d7a3535eb3dc2a975071d Mon Sep 17 00:00:00 2001
From: Muxi Yan <mxyan@google.com>
Date: Thu, 5 Sep 2019 11:01:46 -0700
Subject: [PATCH] Fix transport manager shutdown queuing

---
 src/objective-c/GRPCClient/private/GRPCTransport+Private.m | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/src/objective-c/GRPCClient/private/GRPCTransport+Private.m b/src/objective-c/GRPCClient/private/GRPCTransport+Private.m
index 5e9c2b52ab4..1ce9e8940ef 100644
--- a/src/objective-c/GRPCClient/private/GRPCTransport+Private.m
+++ b/src/objective-c/GRPCClient/private/GRPCTransport+Private.m
@@ -46,11 +46,10 @@
   return self;
 }
 
+// Must be called on _dispatchQueue or queues targeted by _dispatchQueue
 - (void)shutDown {
-  dispatch_async(_dispatchQueue, ^{
-    self->_transport = nil;
-    self->_previousInterceptor = nil;
-  });
+  _transport = nil;
+  _previousInterceptor = nil;
 }
 
 - (dispatch_queue_t)dispatchQueue {