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, 5 insertions, 3 deletions

diff --git a/django/contrib/admin/templatetags/base.py b/django/contrib/admin/templatetags/base.py
index 9551c0e71d..3f8290d3b1 100644
--- a/django/contrib/admin/templatetags/base.py
+++ b/django/contrib/admin/templatetags/base.py
@@ -1,6 +1,7 @@
 from inspect import getfullargspec
 
 from django.template.library import InclusionNode, parse_bits
+from django.utils.inspect import lazy_annotations
 
 
 class InclusionAdminNode(InclusionNode):
@@ -11,9 +12,10 @@ class InclusionAdminNode(InclusionNode):
 
     def __init__(self, parser, token, func, template_name, takes_context=True):
         self.template_name = template_name
-        params, varargs, varkw, defaults, kwonly, kwonly_defaults, _ = getfullargspec(
-            func
-        )
+        with lazy_annotations():
+            params, varargs, varkw, defaults, kwonly, kwonly_defaults, _ = (
+                getfullargspec(func)
+            )
         bits = token.split_contents()
         args, kwargs = parse_bits(
             parser,