From 9440f6ba41e5e96458cd7949fc6d605ef5bd09e9 Mon Sep 17 00:00:00 2001
From: Mariusz Felisiak <felisiak.mariusz@gmail.com>
Date: Wed, 26 Apr 2023 08:36:56 +0200
Subject: [PATCH] Fixed #34512 -- Restored breadcrumbs on admin app index view.

Thanks Adam (ataylor32) for the report.

Regression in 872b61193b013a700ff88cf50f0eb2cf2c266ff7.
---
 .../admin/templates/admin/app_index.html       | 18 ++++++++++--------
 docs/releases/4.2.1.txt                        |  3 +++
 tests/admin_views/test_breadcrumbs.py          |  4 ++++
 3 files changed, 17 insertions(+), 8 deletions(-)

diff --git a/django/contrib/admin/templates/admin/app_index.html b/django/contrib/admin/templates/admin/app_index.html
index 886bf6ca00d..727f72b190e 100644
--- a/django/contrib/admin/templates/admin/app_index.html
+++ b/django/contrib/admin/templates/admin/app_index.html
@@ -4,14 +4,16 @@
 {% block bodyclass %}{{ block.super }} app-{{ app_label }}{% endblock %}
 
 {% if not is_popup %}
-{% block breadcrumbs %}
-<div class="breadcrumbs">
-<a href="{% url 'admin:index' %}">{% translate 'Home' %}</a>
-&rsaquo;
-{% for app in app_list %}
-{{ app.name }}
-{% endfor %}
-</div>
+{% block nav-breadcrumbs %}
+  <nav aria-label="{% translate 'Breadcrumbs' %}">
+    <div class="breadcrumbs">
+      <a href="{% url 'admin:index' %}">{% translate 'Home' %}</a>
+      &rsaquo;
+      {% for app in app_list %}
+        {{ app.name }}
+      {% endfor %}
+    </div>
+  </nav>
 {% endblock %}
 {% endif %}
 
diff --git a/docs/releases/4.2.1.txt b/docs/releases/4.2.1.txt
index ffc9394daec..31747c1a23d 100644
--- a/docs/releases/4.2.1.txt
+++ b/docs/releases/4.2.1.txt
@@ -44,3 +44,6 @@ Bugfixes
 
 * Fixed a regression in Django 4.2 that caused incorrect ``ClearableFileInput``
   margins in the admin (:ticket:`34506`).
+
+* Fixed a regression in Django 4.2 where breadcrumbs didn't appear on admin
+  site app index views (:ticket:`34512`).
diff --git a/tests/admin_views/test_breadcrumbs.py b/tests/admin_views/test_breadcrumbs.py
index ee4285f9a98..87186e251ca 100644
--- a/tests/admin_views/test_breadcrumbs.py
+++ b/tests/admin_views/test_breadcrumbs.py
@@ -23,3 +23,7 @@ class AdminBreadcrumbsTests(TestCase):
     def test_breadcrumbs_present(self):
         response = self.client.get(reverse("admin:auth_user_add"))
         self.assertContains(response, '<nav aria-label="Breadcrumbs">')
+        response = self.client.get(
+            reverse("admin:app_list", kwargs={"app_label": "auth"})
+        )
+        self.assertContains(response, '<nav aria-label="Breadcrumbs">')