[6.0.x] Fixed #36903 -- Fixed further NameErrors when inspecting functions with deferred annotations.

Provide a wrapper for safe introspection of user functions on Python 3.14+.

Follow-up to 601914722956cc41f1f2c53972d669ddee6ffc04.
Backport of 56ed37e17e5b1a509aa68a0c797dcff34fcc1366 from main.

2 files changed, 4 insertions, 6 deletions

diff --git a/django/core/checks/security/csrf.py b/django/core/checks/security/csrf.py
index d00f2259c6..51be377f48 100644
--- a/django/core/checks/security/csrf.py
+++ b/django/core/checks/security/csrf.py
@@ -1,6 +1,5 @@
-import inspect
-
 from django.conf import settings
+from django.utils.inspect import signature
 
 from .. import Error, Tags, Warning, register
 
@@ -57,7 +56,7 @@ def check_csrf_failure_view(app_configs, **kwargs):
         errors.append(Error(msg, id="security.E102"))
     else:
         try:
-            inspect.signature(view).bind(None, reason=None)
+            signature(view).bind(None, reason=None)
         except TypeError:
             msg = (
                 "The CSRF failure view '%s' does not take the correct number of "
diff --git a/django/core/checks/urls.py b/django/core/checks/urls.py
index 94bf8f990d..57141bd025 100644
--- a/django/core/checks/urls.py
+++ b/django/core/checks/urls.py
@@ -1,8 +1,8 @@
-import inspect
 from collections import Counter
 
 from django.conf import settings
 from django.core.exceptions import ViewDoesNotExist
+from django.utils.inspect import signature
 
 from . import Error, Tags, Warning, register
 
@@ -142,10 +142,9 @@ def check_custom_error_handlers(app_configs, **kwargs):
             ).format(status_code=status_code, path=path)
             errors.append(Error(msg, hint=str(e), id="urls.E008"))
             continue
-        signature = inspect.signature(handler)
         args = [None] * num_parameters
         try:
-            signature.bind(*args)
+            signature(handler).bind(*args)
         except TypeError:
             msg = (
                 "The custom handler{status_code} view '{path}' does not "