From 24e985d569d7db5bfac9dadfb70e4344b64577f6 Mon Sep 17 00:00:00 2001
From: Viicos <65306057+Viicos@users.noreply.github.com>
Date: Thu, 6 Aug 2026 15:39:15 +0200
Subject: [PATCH 1/2] gh-155278: Avoid needlessly accessing
 `ForwardRef.__forward_code__` in `evaluate_forward_ref()`

---
 Lib/typing.py | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/Lib/typing.py b/Lib/typing.py
index 809c0ff88607a59..d1d9ad41ed97cca 100644
--- a/Lib/typing.py
+++ b/Lib/typing.py
@@ -25,6 +25,7 @@
 import collections.abc
 import copyreg
 import functools
+import keyword
 import operator
 import sys
 import types
@@ -998,8 +999,12 @@ def _make_forward_ref(code, *, parent_fwdref=None, **kwargs):
         if parent_fwdref.__owner__ is not None:
             kwargs['owner'] = parent_fwdref.__owner__
     forward_ref = annotationlib.ForwardRef(code, **kwargs)
-    # For compatibility, eagerly compile the forwardref's code.
-    forward_ref.__forward_code__
+    # For compatibility, eagerly compile the forwardref's code so that any
+    # SyntaxError is raised immediately rather than when the forward
+    # reference is evaluated. Similar to 'ForwardRef.evaluate(), we only compile
+    # it if necessary:
+    if not (code.isidentifier() and not keyword.iskeyword(code)):
+        forward_ref.__forward_code__
     return forward_ref
 
 

From ca262b1cb6d8bd22e8be64383ed1a61fe9c8bc91 Mon Sep 17 00:00:00 2001
From: Victorien <65306057+Viicos@users.noreply.github.com>
Date: Fri, 7 Aug 2026 09:51:01 +0200
Subject: [PATCH 2/2] Apply suggestion from @Viicos

---
 Lib/typing.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Lib/typing.py b/Lib/typing.py
index d1d9ad41ed97cca..8587813a9ebe9ff 100644
--- a/Lib/typing.py
+++ b/Lib/typing.py
@@ -1001,7 +1001,7 @@ def _make_forward_ref(code, *, parent_fwdref=None, **kwargs):
     forward_ref = annotationlib.ForwardRef(code, **kwargs)
     # For compatibility, eagerly compile the forwardref's code so that any
     # SyntaxError is raised immediately rather than when the forward
-    # reference is evaluated. Similar to 'ForwardRef.evaluate(), we only compile
+    # reference is evaluated. Similar to 'ForwardRef.evaluate()', we only compile
     # it if necessary:
     if not (code.isidentifier() and not keyword.iskeyword(code)):
         forward_ref.__forward_code__