Fixed #36712 -- Evaluated type annotations lazily in template tag registration.

Ideally, this will be reverted when an upstream solution is available for
https://github.com/python/cpython/issues/141560.

Thanks Patrick Rauscher for the report and Augusto Pontes for the
first iteration and test.

1 files changed, 20 insertions, 0 deletions

diff --git a/tests/admin_views/test_templatetags.py b/tests/admin_views/test_templatetags.py
index 185fe156a6..e8129cce1d 100644
--- a/tests/admin_views/test_templatetags.py
+++ b/tests/admin_views/test_templatetags.py
@@ -1,13 +1,17 @@
 import datetime
+import unittest
 
 from django.contrib.admin import ModelAdmin
 from django.contrib.admin.templatetags.admin_list import date_hierarchy
 from django.contrib.admin.templatetags.admin_modify import submit_row
+from django.contrib.admin.templatetags.base import InclusionAdminNode
 from django.contrib.auth import get_permission_codename
 from django.contrib.auth.admin import UserAdmin
 from django.contrib.auth.models import User
+from django.template.base import Token, TokenType
 from django.test import RequestFactory, TestCase
 from django.urls import reverse
+from django.utils.version import PY314
 
 from .admin import ArticleAdmin, site
 from .models import Article, Question
@@ -131,6 +135,22 @@ class AdminTemplateTagsTest(AdminViewBasicTestCase):
         self.assertContains(response, "override-pagination")
         self.assertContains(response, "override-search_form")
 
+    @unittest.skipUnless(PY314, "Deferred annotations are Python 3.14+ only")
+    def test_inclusion_admin_node_deferred_annotation(self):
+        def action(arg: SomeType = None):  # NOQA: F821
+            pass
+
+        # This used to raise TypeError via the underlying call to
+        # inspect.getfullargspec(), which is not ready for deferred
+        # evaluation of annotations.
+        InclusionAdminNode(
+            parser=object(),
+            token=Token(token_type=TokenType.TEXT, contents="a"),
+            func=action,
+            template_name="test.html",
+            takes_context=False,
+        )
+
 
 class DateHierarchyTests(TestCase):
     factory = RequestFactory()