[5.2.x] 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.

Backport of 34186e731ca20a2344b1f88fd543a854d6b13a00 from main.

1 files changed, 17 insertions, 0 deletions

diff --git a/tests/template_tests/test_parser.py b/tests/template_tests/test_parser.py
index eb3bb49113..199148970f 100644
--- a/tests/template_tests/test_parser.py
+++ b/tests/template_tests/test_parser.py
@@ -3,6 +3,8 @@ Testing some internals of the template processing.
 These are *not* examples to be copied in user code.
 """
 
+import unittest
+
 from django.template import Library, TemplateSyntaxError
 from django.template.base import (
     FilterExpression,
@@ -14,6 +16,7 @@ from django.template.base import (
 )
 from django.template.defaultfilters import register as filter_library
 from django.test import SimpleTestCase
+from django.utils.version import PY314
 
 
 class ParserTests(SimpleTestCase):
@@ -148,3 +151,17 @@ class ParserTests(SimpleTestCase):
             '1|two_one_opt_arg:"1"',
         ):
             FilterExpression(expr, parser)
+
+    @unittest.skipUnless(PY314, "Deferred annotations are Python 3.14+ only")
+    def test_filter_deferred_annotation(self):
+        register = Library()
+
+        @register.filter("example")
+        def example_filter(value: str, arg: SomeType):  # NOQA: F821
+            return f"{value}_{arg}"
+
+        result = FilterExpression.args_check(
+            "example", example_filter, ["extra_example"]
+        )
+
+        self.assertIs(result, True)