diff --git a/torch/csrc/dynamo/guards.cpp b/torch/csrc/dynamo/guards.cpp
index ea72631d8ad..6682e91cd08 100644
--- a/torch/csrc/dynamo/guards.cpp
+++ b/torch/csrc/dynamo/guards.cpp
@@ -2648,9 +2648,7 @@ class GuardAccessor {
   // subtree on immutable dict getitems.
   virtual bool check_nopybind(PyObject* obj, bool matches_dict_tag = false) = 0;
   virtual bool check_nopybind(FrameLocalsMapping* map, bool matches_dict_tag) {
-    // throw std::runtime_error("fallback to python");
-    // Could fallback to running check on the Python dict (lazily constructed)
-    return check_nopybind((PyObject*)map->to_dict(), matches_dict_tag);
+    throw std::runtime_error("fallback to python");
   }
   virtual GuardDebugInfo check_verbose_nopybind(PyObject* obj) = 0;
   virtual std::string repr() const = 0;