From 4806c42efac790dd65bc890b85904df7bdeb1309 Mon Sep 17 00:00:00 2001
From: Adam Johnson <me@adamj.eu>
Date: Mon, 9 Dec 2024 15:40:47 +0000
Subject: [PATCH] Fixed #35987 -- Made ErrorList.copy() copy the renderer
 attribute.

---
 django/forms/utils.py                 |  1 +
 tests/forms_tests/tests/test_forms.py |  6 ++++++
 tests/forms_tests/tests/test_utils.py | 12 ++++++++++++
 3 files changed, 19 insertions(+)

diff --git a/django/forms/utils.py b/django/forms/utils.py
index d24711d1a0..27eabe57dc 100644
--- a/django/forms/utils.py
+++ b/django/forms/utils.py
@@ -163,6 +163,7 @@ class ErrorList(UserList, list, RenderableErrorMixin):
     def copy(self):
         copy = super().copy()
         copy.error_class = self.error_class
+        copy.renderer = self.renderer
         return copy
 
     def get_json_data(self, escape_html=False):
diff --git a/tests/forms_tests/tests/test_forms.py b/tests/forms_tests/tests/test_forms.py
index d88ac33f24..b49f0a8a69 100644
--- a/tests/forms_tests/tests/test_forms.py
+++ b/tests/forms_tests/tests/test_forms.py
@@ -4849,6 +4849,12 @@ class RendererTests(SimpleTestCase):
         form = CustomForm(renderer=custom)
         self.assertEqual(form.renderer, custom)
 
+    def test_get_context_errors(self):
+        custom = CustomRenderer()
+        form = Form(renderer=custom)
+        context = form.get_context()
+        self.assertEqual(context["errors"].renderer, custom)
+
 
 class TemplateTests(SimpleTestCase):
     def test_iterate_radios(self):
diff --git a/tests/forms_tests/tests/test_utils.py b/tests/forms_tests/tests/test_utils.py
index f9a5d4c82a..85f7094212 100644
--- a/tests/forms_tests/tests/test_utils.py
+++ b/tests/forms_tests/tests/test_utils.py
@@ -2,6 +2,7 @@ import copy
 import json
 
 from django.core.exceptions import ValidationError
+from django.forms.renderers import DjangoTemplates
 from django.forms.utils import (
     ErrorDict,
     ErrorList,
@@ -161,6 +162,17 @@ class FormsUtilsTestCase(SimpleTestCase):
             '<a href="http://www.example.com/">example</a></li></ul>',
         )
 
+    def test_error_list_copy_attributes(self):
+        class CustomRenderer(DjangoTemplates):
+            pass
+
+        renderer = CustomRenderer()
+        e = ErrorList(error_class="woopsies", renderer=renderer)
+
+        e_copy = e.copy()
+        self.assertEqual(e.error_class, e_copy.error_class)
+        self.assertEqual(e.renderer, e_copy.renderer)
+
     def test_error_dict_copy(self):
         e = ErrorDict()
         e["__all__"] = ErrorList(