From 2979419f7bb10b554102e972351f8d03c8ffd1fa Mon Sep 17 00:00:00 2001
From: Nikita Sobolev <mail@sobolevn.me>
Date: Tue, 6 Sep 2022 17:54:26 +0300
Subject: [PATCH] Backport python/cpython#96479 (#73)

Issue: https://github.com/python/cpython/issues/96478
PR: https://github.com/python/cpython/pull/96479
---
 src/test_typing_extensions.py | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/src/test_typing_extensions.py b/src/test_typing_extensions.py
index 18a9132f..64d052b2 100644
--- a/src/test_typing_extensions.py
+++ b/src/test_typing_extensions.py
@@ -493,6 +493,23 @@ def blah():
 
         blah()
 
+    @patch(
+        f"{registry_holder.__name__}._overload_registry",
+        defaultdict(lambda: defaultdict(dict))
+    )
+    def test_overload_on_compiled_functions(self):
+        registry = registry_holder._overload_registry
+        # The registry starts out empty:
+        self.assertEqual(registry, {})
+
+        # This should just not fail:
+        overload(sum)
+        overload(print)
+
+        # No overloads are recorded:
+        self.assertEqual(get_overloads(sum), [])
+        self.assertEqual(get_overloads(print), [])
+
     def set_up_overloads(self):
         def blah():
             pass