Move the unref

src/core/lib/surface/server.cc

@@ -462,7 +462,6 @@ static void finish_destroy_channel(void* cd, grpc_error* error) {
   channel_data* chand = static_cast<channel_data*>(cd);
   grpc_server* server = chand->server;
   GRPC_CHANNEL_INTERNAL_UNREF(chand->channel, "server");
-  chand->socket_node.reset();
   server_unref(server);
 }
 
@@ -951,6 +950,7 @@ static grpc_error* init_channel_elem(grpc_channel_element* elem,
 static void destroy_channel_elem(grpc_channel_element* elem) {
   size_t i;
   channel_data* chand = static_cast<channel_data*>(elem->channel_data);
+  chand->socket_node.reset();
   if (chand->registered_methods) {
     for (i = 0; i < chand->registered_method_slots; i++) {
       grpc_slice_unref_internal(chand->registered_methods[i].method);