Inproc: properly handle send message that won't go to other side

src/core/ext/transport/inproc/inproc_transport.cc

@@ -1032,6 +1032,11 @@ void perform_stream_op(grpc_transport* gt, grpc_stream* gs,
     }
   } else {
     if (error != GRPC_ERROR_NONE) {
+      // Consume any send message that was sent here but that we are not pushing
+      // to the other side
+      if (op->send_message) {
+        op->payload->send_message.send_message.reset();
+      }
       // Schedule op's closures that we didn't push to op state machine
       if (op->recv_initial_metadata) {
         if (op->payload->recv_initial_metadata.trailing_metadata_available !=