We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
Create a custom page for 500 error
The page should have an apology and an suggestion to continue the purchase with the help of a consultant

--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `shopelectro/urls.py`
Content:
```
1 from datetime import timedelta
2 from collections import OrderedDict
3 
4 from django.conf import settings
5 from django.conf.urls import url, include
6 from django.conf.urls.static import static
7 from django.contrib.sitemaps.views import sitemap
8 from django.views.decorators.cache import cache_page, never_cache
9 
10 from pages.views import RobotsView, SitemapPage
11 from pages.urls import custom_page_url
12 
13 from shopelectro import sitemaps, views
14 from shopelectro.admin import se_admin
15 
16 
17 def cached_time(*args, **kwargs) -> int:
18     """Return value of time for caching in seconds."""
19     return int(timedelta(*args, **kwargs).total_seconds())
20 
21 
22 # Orders sitemaps instances
23 sitemaps = OrderedDict([
24     ('index', sitemaps.IndexSitemap),
25     ('category', sitemaps.CategorySitemap),
26     ('category-with-tags', sitemaps.CategoryWithTagsSitemap),
27     ('products', sitemaps.ProductSitemap),
28     ('site', sitemaps.PagesSitemap)
29 ])
30 
31 # disable cache
32 if settings.DEBUG:
33     def cache_page(arg):  # Ignore PyFlakesBear
34         if callable(arg):
35             return arg
36         return cache_page
37 
38 cached_60d = cache_page(cached_time(days=60))
39 cached_2h = cache_page(cached_time(hours=2))
40 
41 admin_urls = [
42     url(r'^', se_admin.urls),
43     url(r'^autocomplete/$', views.AdminAutocomplete.as_view(), name='admin_autocomplete'),
44     url(r'^get-tree-items/$', views.Tree.as_view()),
45     url(r'^redirect-to-product/$', views.RedirectToProduct.as_view()),
46     url(r'^table-editor-api/$', views.TableEditorAPI.as_view()),
47     url(r'^select2/', include('django_select2.urls')),
48 ]
49 
50 catalog_urls = [
51     # "category" group
52     url(r'^categories/(?P<slug>[\w-]+)/$',
53         cached_2h(views.CategoryPage.as_view()), name='category'),
54     url(r'^categories/(?P<slug>[\w-]+)/tags/(?P<tags>[\w_-]+)/$',
55         cached_2h(views.CategoryPage.as_view()), name='category'),
56     url(r'^categories/(?P<slug>[\w-]+)/(?P<sorting>[0-9]*)/$',
57         views.CategoryPage.as_view(), name='category'),
58     url(r'^categories/(?P<slug>[\w-]+)/(?P<sorting>[0-9]*)/tags/(?P<tags>[\w_-]+)/$',
59         views.CategoryPage.as_view(), name='category'),
60     # "load more" group
61     url(r'categories/(?P<slug>[\w-]+)/load-more/'
62         r'(?P<offset>[0-9]+)/(?P<sorting>[0-9]*)/$',
63         views.load_more, name='load_more'),
64     url(r'categories/(?P<slug>[\w-]+)/load-more/'
65         r'(?P<offset>[0-9]+)/(?P<sorting>[0-9]*)/tags/(?P<tags>[\w_-]+)/$',
66         views.load_more, name='load_more'),
67     # rest of urls
68     url(r'^no-images/$', views.ProductsWithoutImages.as_view(),
69         name='products_without_images'),
70     url(r'^no-text/$', views.ProductsWithoutText.as_view(),
71         name='products_without_text'),
72     url(r'^products/(?P<product_vendor_code>[0-9]+)/$',
73         views.ProductPage.as_view(), name='product'),
74 ]
75 
76 service_urls = [
77     url(r'^ya-kassa/aviso/$', views.yandex_aviso, name='yandex_aviso'),
78     url(r'^ya-kassa/check/$', views.yandex_check, name='yandex_check'),
79     url(r'^ya-feedback/redirect/$',
80         views.ya_feedback_with_redirect, name='ya_feedback_with_redirect'),
81     url(r'^ya-feedback/request/$',
82         views.ya_feedback_request, name='ya_feedback_request'),
83 ]
84 
85 search_urls = [
86     url(r'^autocomplete/$', views.Autocomplete.as_view(), name='autocomplete'),
87 ]
88 
89 ecommerce_urls = [
90     url(r'^cart-get/$', never_cache(views.Cart.as_view()), name='cart_get'),
91     url(r'^cart-add/$', views.AddToCart.as_view(), name='cart_add'),
92     url(r'^cart-change/$', views.ChangeCount.as_view(), name='cart_set_count'),
93     url(r'^cart-flush/$', views.FlushCart.as_view(), name='cart_flush'),
94     url(r'^cart-remove/$', views.RemoveFromCart.as_view(), name='cart_remove'),
95     url(r'^order-call/$', views.order_call),
96     url(r'^one-click-buy/$', views.one_click_buy),
97     url(r'^yandex-order/$', views.YandexOrder.as_view()),
98     url(r'', include('ecommerce.urls')),
99 ]
100 
101 custom_pages = [
102     # can't use just `r'^(?P<page>)$'` with no args to views, because reverse don't work
103     custom_page_url(r'^$', cached_2h(views.IndexPage.as_view()), {'page': ''}, name='index'),
104     custom_page_url(r'^(?P<page>robots\.txt)$', RobotsView.as_view()),
105     custom_page_url(r'^(?P<page>search)/$', views.Search.as_view()),
106     custom_page_url(r'^(?P<page>catalog)/$', cached_2h(views.category_matrix)),
107     custom_page_url(r'^(?P<page>sitemap)/$', SitemapPage.as_view()),
108     # these pages should show only actual state
109     custom_page_url(r'^shop/(?P<page>order)/$', never_cache(views.OrderPage.as_view())),
110     custom_page_url(r'^shop/(?P<page>order-success)/$', never_cache(views.OrderSuccess.as_view())),
111 ]
112 
113 urlpatterns = [
114     url('', include(custom_pages)),
115     url(r'^admin/', include(admin_urls)),
116     url(r'^catalog/', include(catalog_urls)),
117     url(r'^pages/', include('pages.urls')),
118     url(r'^save-feedback/$', views.save_feedback),
119     url(r'^delete-feedback/$', views.delete_feedback),
120     url(r'^set-view-type/$', views.set_view_type, name='set_view_type'),
121     url(r'^shop/', include(ecommerce_urls)),
122     url(r'^search/', include(search_urls)),
123     url(r'^service/', include(service_urls)),
124     url(r'^sitemap\.xml$', cached_60d(sitemap), {'sitemaps': sitemaps}, name='sitemap'),
125 ]
126 
127 if settings.DEBUG:
128     import debug_toolbar
129 
130     urlpatterns += [
131         url(r'^__debug__/', include(debug_toolbar.urls)),
132         *static(settings.STATIC_URL, document_root=settings.STATIC_ROOT),
133         *static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT),
134     ]
135
```
--- END FILES ---

Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.

Here is an example:

```diff
diff --git a/examples/server_async.py b/examples/server_async.py
--- a/examples/server_async.py
+++ b/examples/server_async.py
@@ -313,4 +313,4 @@
 
 
 if __name__ == "__main__":
-    asyncio.run(run_async_server("."), debug=True)
+    asyncio.run(run_async_server(), debug=True)
diff --git a/examples/server_sync.py b/examples/server_sync.py
--- a/examples/server_sync.py
+++ b/examples/server_sync.py
@@ -313,5 +313,5 @@
 
 
 if __name__ == "__main__":
-    server = run_sync_server(".")
+    server = run_sync_server()
     server.shutdown()

```

diff --git a/shopelectro/urls.py b/shopelectro/urls.py
--- a/shopelectro/urls.py
+++ b/shopelectro/urls.py
@@ -1,15 +1,15 @@
-from datetime import timedelta
 from collections import OrderedDict
+from datetime import timedelta
 
 from django.conf import settings
 from django.conf.urls import url, include
 from django.conf.urls.static import static
 from django.contrib.sitemaps.views import sitemap
 from django.views.decorators.cache import cache_page, never_cache
+from django.views.generic import TemplateView
 
-from pages.views import RobotsView, SitemapPage
 from pages.urls import custom_page_url
-
+from pages.views import RobotsView, SitemapPage
 from shopelectro import sitemaps, views
 from shopelectro.admin import se_admin
 
@@ -132,3 +132,11 @@
         *static(settings.STATIC_URL, document_root=settings.STATIC_ROOT),
         *static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT),
     ]
+
+# Test and Debug environments replace real 404 and 500 error with stack traces.
+# We expose real 404 and 500 pages with separated urls to test them.
+if settings.TEST_ENV or settings.DEBUG:
+    urlpatterns += [
+        url(r'^404/$', TemplateView.as_view(template_name='404.html')),
+        url(r'^500/$', TemplateView.as_view(template_name='500.html')),
+    ]

{"golden_diff": "diff --git a/shopelectro/urls.py b/shopelectro/urls.py\n--- a/shopelectro/urls.py\n+++ b/shopelectro/urls.py\n@@ -1,15 +1,15 @@\n-from datetime import timedelta\n from collections import OrderedDict\n+from datetime import timedelta\n \n from django.conf import settings\n from django.conf.urls import url, include\n from django.conf.urls.static import static\n from django.contrib.sitemaps.views import sitemap\n from django.views.decorators.cache import cache_page, never_cache\n+from django.views.generic import TemplateView\n \n-from pages.views import RobotsView, SitemapPage\n from pages.urls import custom_page_url\n-\n+from pages.views import RobotsView, SitemapPage\n from shopelectro import sitemaps, views\n from shopelectro.admin import se_admin\n \n@@ -132,3 +132,11 @@\n         *static(settings.STATIC_URL, document_root=settings.STATIC_ROOT),\n         *static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT),\n     ]\n+\n+# Test and Debug environments replace real 404 and 500 error with stack traces.\n+# We expose real 404 and 500 pages with separated urls to test them.\n+if settings.TEST_ENV or settings.DEBUG:\n+    urlpatterns += [\n+        url(r'^404/$', TemplateView.as_view(template_name='404.html')),\n+        url(r'^500/$', TemplateView.as_view(template_name='500.html')),\n+    ]\n", "issue": "Create a custom page for 500 error\nThe page should have an apology and an suggestion to continue the purchase with the help of a consultant\n", "before_files": [{"content": "from datetime import timedelta\nfrom collections import OrderedDict\n\nfrom django.conf import settings\nfrom django.conf.urls import url, include\nfrom django.conf.urls.static import static\nfrom django.contrib.sitemaps.views import sitemap\nfrom django.views.decorators.cache import cache_page, never_cache\n\nfrom pages.views import RobotsView, SitemapPage\nfrom pages.urls import custom_page_url\n\nfrom shopelectro import sitemaps, views\nfrom shopelectro.admin import se_admin\n\n\ndef cached_time(*args, **kwargs) -> int:\n    \"\"\"Return value of time for caching in seconds.\"\"\"\n    return int(timedelta(*args, **kwargs).total_seconds())\n\n\n# Orders sitemaps instances\nsitemaps = OrderedDict([\n    ('index', sitemaps.IndexSitemap),\n    ('category', sitemaps.CategorySitemap),\n    ('category-with-tags', sitemaps.CategoryWithTagsSitemap),\n    ('products', sitemaps.ProductSitemap),\n    ('site', sitemaps.PagesSitemap)\n])\n\n# disable cache\nif settings.DEBUG:\n    def cache_page(arg):  # Ignore PyFlakesBear\n        if callable(arg):\n            return arg\n        return cache_page\n\ncached_60d = cache_page(cached_time(days=60))\ncached_2h = cache_page(cached_time(hours=2))\n\nadmin_urls = [\n    url(r'^', se_admin.urls),\n    url(r'^autocomplete/$', views.AdminAutocomplete.as_view(), name='admin_autocomplete'),\n    url(r'^get-tree-items/$', views.Tree.as_view()),\n    url(r'^redirect-to-product/$', views.RedirectToProduct.as_view()),\n    url(r'^table-editor-api/$', views.TableEditorAPI.as_view()),\n    url(r'^select2/', include('django_select2.urls')),\n]\n\ncatalog_urls = [\n    # \"category\" group\n    url(r'^categories/(?P<slug>[\\w-]+)/$',\n        cached_2h(views.CategoryPage.as_view()), name='category'),\n    url(r'^categories/(?P<slug>[\\w-]+)/tags/(?P<tags>[\\w_-]+)/$',\n        cached_2h(views.CategoryPage.as_view()), name='category'),\n    url(r'^categories/(?P<slug>[\\w-]+)/(?P<sorting>[0-9]*)/$',\n        views.CategoryPage.as_view(), name='category'),\n    url(r'^categories/(?P<slug>[\\w-]+)/(?P<sorting>[0-9]*)/tags/(?P<tags>[\\w_-]+)/$',\n        views.CategoryPage.as_view(), name='category'),\n    # \"load more\" group\n    url(r'categories/(?P<slug>[\\w-]+)/load-more/'\n        r'(?P<offset>[0-9]+)/(?P<sorting>[0-9]*)/$',\n        views.load_more, name='load_more'),\n    url(r'categories/(?P<slug>[\\w-]+)/load-more/'\n        r'(?P<offset>[0-9]+)/(?P<sorting>[0-9]*)/tags/(?P<tags>[\\w_-]+)/$',\n        views.load_more, name='load_more'),\n    # rest of urls\n    url(r'^no-images/$', views.ProductsWithoutImages.as_view(),\n        name='products_without_images'),\n    url(r'^no-text/$', views.ProductsWithoutText.as_view(),\n        name='products_without_text'),\n    url(r'^products/(?P<product_vendor_code>[0-9]+)/$',\n        views.ProductPage.as_view(), name='product'),\n]\n\nservice_urls = [\n    url(r'^ya-kassa/aviso/$', views.yandex_aviso, name='yandex_aviso'),\n    url(r'^ya-kassa/check/$', views.yandex_check, name='yandex_check'),\n    url(r'^ya-feedback/redirect/$',\n        views.ya_feedback_with_redirect, name='ya_feedback_with_redirect'),\n    url(r'^ya-feedback/request/$',\n        views.ya_feedback_request, name='ya_feedback_request'),\n]\n\nsearch_urls = [\n    url(r'^autocomplete/$', views.Autocomplete.as_view(), name='autocomplete'),\n]\n\necommerce_urls = [\n    url(r'^cart-get/$', never_cache(views.Cart.as_view()), name='cart_get'),\n    url(r'^cart-add/$', views.AddToCart.as_view(), name='cart_add'),\n    url(r'^cart-change/$', views.ChangeCount.as_view(), name='cart_set_count'),\n    url(r'^cart-flush/$', views.FlushCart.as_view(), name='cart_flush'),\n    url(r'^cart-remove/$', views.RemoveFromCart.as_view(), name='cart_remove'),\n    url(r'^order-call/$', views.order_call),\n    url(r'^one-click-buy/$', views.one_click_buy),\n    url(r'^yandex-order/$', views.YandexOrder.as_view()),\n    url(r'', include('ecommerce.urls')),\n]\n\ncustom_pages = [\n    # can't use just `r'^(?P<page>)$'` with no args to views, because reverse don't work\n    custom_page_url(r'^$', cached_2h(views.IndexPage.as_view()), {'page': ''}, name='index'),\n    custom_page_url(r'^(?P<page>robots\\.txt)$', RobotsView.as_view()),\n    custom_page_url(r'^(?P<page>search)/$', views.Search.as_view()),\n    custom_page_url(r'^(?P<page>catalog)/$', cached_2h(views.category_matrix)),\n    custom_page_url(r'^(?P<page>sitemap)/$', SitemapPage.as_view()),\n    # these pages should show only actual state\n    custom_page_url(r'^shop/(?P<page>order)/$', never_cache(views.OrderPage.as_view())),\n    custom_page_url(r'^shop/(?P<page>order-success)/$', never_cache(views.OrderSuccess.as_view())),\n]\n\nurlpatterns = [\n    url('', include(custom_pages)),\n    url(r'^admin/', include(admin_urls)),\n    url(r'^catalog/', include(catalog_urls)),\n    url(r'^pages/', include('pages.urls')),\n    url(r'^save-feedback/$', views.save_feedback),\n    url(r'^delete-feedback/$', views.delete_feedback),\n    url(r'^set-view-type/$', views.set_view_type, name='set_view_type'),\n    url(r'^shop/', include(ecommerce_urls)),\n    url(r'^search/', include(search_urls)),\n    url(r'^service/', include(service_urls)),\n    url(r'^sitemap\\.xml$', cached_60d(sitemap), {'sitemaps': sitemaps}, name='sitemap'),\n]\n\nif settings.DEBUG:\n    import debug_toolbar\n\n    urlpatterns += [\n        url(r'^__debug__/', include(debug_toolbar.urls)),\n        *static(settings.STATIC_URL, document_root=settings.STATIC_ROOT),\n        *static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT),\n    ]\n", "path": "shopelectro/urls.py"}], "after_files": [{"content": "from collections import OrderedDict\nfrom datetime import timedelta\n\nfrom django.conf import settings\nfrom django.conf.urls import url, include\nfrom django.conf.urls.static import static\nfrom django.contrib.sitemaps.views import sitemap\nfrom django.views.decorators.cache import cache_page, never_cache\nfrom django.views.generic import TemplateView\n\nfrom pages.urls import custom_page_url\nfrom pages.views import RobotsView, SitemapPage\nfrom shopelectro import sitemaps, views\nfrom shopelectro.admin import se_admin\n\n\ndef cached_time(*args, **kwargs) -> int:\n    \"\"\"Return value of time for caching in seconds.\"\"\"\n    return int(timedelta(*args, **kwargs).total_seconds())\n\n\n# Orders sitemaps instances\nsitemaps = OrderedDict([\n    ('index', sitemaps.IndexSitemap),\n    ('category', sitemaps.CategorySitemap),\n    ('category-with-tags', sitemaps.CategoryWithTagsSitemap),\n    ('products', sitemaps.ProductSitemap),\n    ('site', sitemaps.PagesSitemap)\n])\n\n# disable cache\nif settings.DEBUG:\n    def cache_page(arg):  # Ignore PyFlakesBear\n        if callable(arg):\n            return arg\n        return cache_page\n\ncached_60d = cache_page(cached_time(days=60))\ncached_2h = cache_page(cached_time(hours=2))\n\nadmin_urls = [\n    url(r'^', se_admin.urls),\n    url(r'^autocomplete/$', views.AdminAutocomplete.as_view(), name='admin_autocomplete'),\n    url(r'^get-tree-items/$', views.Tree.as_view()),\n    url(r'^redirect-to-product/$', views.RedirectToProduct.as_view()),\n    url(r'^table-editor-api/$', views.TableEditorAPI.as_view()),\n    url(r'^select2/', include('django_select2.urls')),\n]\n\ncatalog_urls = [\n    # \"category\" group\n    url(r'^categories/(?P<slug>[\\w-]+)/$',\n        cached_2h(views.CategoryPage.as_view()), name='category'),\n    url(r'^categories/(?P<slug>[\\w-]+)/tags/(?P<tags>[\\w_-]+)/$',\n        cached_2h(views.CategoryPage.as_view()), name='category'),\n    url(r'^categories/(?P<slug>[\\w-]+)/(?P<sorting>[0-9]*)/$',\n        views.CategoryPage.as_view(), name='category'),\n    url(r'^categories/(?P<slug>[\\w-]+)/(?P<sorting>[0-9]*)/tags/(?P<tags>[\\w_-]+)/$',\n        views.CategoryPage.as_view(), name='category'),\n    # \"load more\" group\n    url(r'categories/(?P<slug>[\\w-]+)/load-more/'\n        r'(?P<offset>[0-9]+)/(?P<sorting>[0-9]*)/$',\n        views.load_more, name='load_more'),\n    url(r'categories/(?P<slug>[\\w-]+)/load-more/'\n        r'(?P<offset>[0-9]+)/(?P<sorting>[0-9]*)/tags/(?P<tags>[\\w_-]+)/$',\n        views.load_more, name='load_more'),\n    # rest of urls\n    url(r'^no-images/$', views.ProductsWithoutImages.as_view(),\n        name='products_without_images'),\n    url(r'^no-text/$', views.ProductsWithoutText.as_view(),\n        name='products_without_text'),\n    url(r'^products/(?P<product_vendor_code>[0-9]+)/$',\n        views.ProductPage.as_view(), name='product'),\n]\n\nservice_urls = [\n    url(r'^ya-kassa/aviso/$', views.yandex_aviso, name='yandex_aviso'),\n    url(r'^ya-kassa/check/$', views.yandex_check, name='yandex_check'),\n    url(r'^ya-feedback/redirect/$',\n        views.ya_feedback_with_redirect, name='ya_feedback_with_redirect'),\n    url(r'^ya-feedback/request/$',\n        views.ya_feedback_request, name='ya_feedback_request'),\n]\n\nsearch_urls = [\n    url(r'^autocomplete/$', views.Autocomplete.as_view(), name='autocomplete'),\n]\n\necommerce_urls = [\n    url(r'^cart-get/$', never_cache(views.Cart.as_view()), name='cart_get'),\n    url(r'^cart-add/$', views.AddToCart.as_view(), name='cart_add'),\n    url(r'^cart-change/$', views.ChangeCount.as_view(), name='cart_set_count'),\n    url(r'^cart-flush/$', views.FlushCart.as_view(), name='cart_flush'),\n    url(r'^cart-remove/$', views.RemoveFromCart.as_view(), name='cart_remove'),\n    url(r'^order-call/$', views.order_call),\n    url(r'^one-click-buy/$', views.one_click_buy),\n    url(r'^yandex-order/$', views.YandexOrder.as_view()),\n    url(r'', include('ecommerce.urls')),\n]\n\ncustom_pages = [\n    # can't use just `r'^(?P<page>)$'` with no args to views, because reverse don't work\n    custom_page_url(r'^$', cached_2h(views.IndexPage.as_view()), {'page': ''}, name='index'),\n    custom_page_url(r'^(?P<page>robots\\.txt)$', RobotsView.as_view()),\n    custom_page_url(r'^(?P<page>search)/$', views.Search.as_view()),\n    custom_page_url(r'^(?P<page>catalog)/$', cached_2h(views.category_matrix)),\n    custom_page_url(r'^(?P<page>sitemap)/$', SitemapPage.as_view()),\n    # these pages should show only actual state\n    custom_page_url(r'^shop/(?P<page>order)/$', never_cache(views.OrderPage.as_view())),\n    custom_page_url(r'^shop/(?P<page>order-success)/$', never_cache(views.OrderSuccess.as_view())),\n]\n\nurlpatterns = [\n    url('', include(custom_pages)),\n    url(r'^admin/', include(admin_urls)),\n    url(r'^catalog/', include(catalog_urls)),\n    url(r'^pages/', include('pages.urls')),\n    url(r'^save-feedback/$', views.save_feedback),\n    url(r'^delete-feedback/$', views.delete_feedback),\n    url(r'^set-view-type/$', views.set_view_type, name='set_view_type'),\n    url(r'^shop/', include(ecommerce_urls)),\n    url(r'^search/', include(search_urls)),\n    url(r'^service/', include(service_urls)),\n    url(r'^sitemap\\.xml$', cached_60d(sitemap), {'sitemaps': sitemaps}, name='sitemap'),\n]\n\nif settings.DEBUG:\n    import debug_toolbar\n\n    urlpatterns += [\n        url(r'^__debug__/', include(debug_toolbar.urls)),\n        *static(settings.STATIC_URL, document_root=settings.STATIC_ROOT),\n        *static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT),\n    ]\n\n# Test and Debug environments replace real 404 and 500 error with stack traces.\n# We expose real 404 and 500 pages with separated urls to test them.\nif settings.TEST_ENV or settings.DEBUG:\n    urlpatterns += [\n        url(r'^404/$', TemplateView.as_view(template_name='404.html')),\n        url(r'^500/$', TemplateView.as_view(template_name='500.html')),\n    ]\n", "path": "shopelectro/urls.py"}]}