copy _requestHeaders in GRPCCall

6 years ago · 515941ae18
parent 1be316e564
commit 515941ae18
1 changed files with 1 additions and 1 deletions
--- a/src/objective-c/GRPCClient/GRPCCall.m
+++ b/src/objective-c/GRPCClient/GRPCCall.m
@ -578,7 +578,7 @@ const char *kCFStreamVarName = "grpc_cfstream";
      break;
  }
-  NSMutableDictionary *headers = _requestHeaders;
+  NSMutableDictionary *headers = [_requestHeaders copy];
  NSString *fetchedOauth2AccessToken;
  @synchronized(self) {
    fetchedOauth2AccessToken = _fetchedOauth2AccessToken;