Re-added completion_queue_destroy call
diff --git a/src/objective-c/GRPCClient/private/GRPCCompletionQueue.m b/src/objective-c/GRPCClient/private/GRPCCompletionQueue.m
index adee053..cae21b7 100644
--- a/src/objective-c/GRPCClient/private/GRPCCompletionQueue.m
+++ b/src/objective-c/GRPCClient/private/GRPCCompletionQueue.m
@@ -54,7 +54,7 @@
// anymore (i.e. on self dealloc). So the block would never end if it
// retained self.
grpc_completion_queue *unmanagedQueue = _unmanagedQueue;
-
+
// Start a loop on a concurrent queue to read events from the completion
// queue and dispatch each.
static dispatch_once_t initialization;
@@ -73,6 +73,7 @@
handler(event->data.op_complete);
break;
case GRPC_QUEUE_SHUTDOWN:
+ grpc_completion_queue_destroy(unmanagedQueue);
return;
default:
[NSException raise:@"Unrecognized completion type" format:@""];