Template crash during login

[spenczar]

Spotted in logs during today's workshop:

[pid: 9|app: 0|req: 44/248] 172.49.58.129 () {40 vars in 598 bytes} [Tue Apr 13 09:27:59 2021] GET /hopauth/login?next=/ => generated 787 bytes in 2 msecs (HTTP/1.1 200) 5 headers in 150 bytes (1 switches on core 0)
2021-04-13 09:27:59,846 DEBUG [django.template:867] base 11 140031216490304 Exception while resolving variable 'name' in template 'unknown'.
Traceback (most recent call last):
  File "/usr/local/lib/python3.8/site-packages/django/core/handlers/exception.py", line 34, in inner
    response = get_response(request)
  File "/usr/local/lib/python3.8/site-packages/django/core/handlers/base.py", line 100, in _get_response
    resolver_match = resolver.resolve(request.path_info)
  File "/usr/local/lib/python3.8/site-packages/django/urls/resolvers.py", line 575, in resolve
    raise Resolver404({'tried': tried, 'path': new_path})
django.urls.exceptions.Resolver404: {'tried': [[<URLPattern ''>], [<URLPattern 'health_check/'>], [<URLResolver <URLPattern list> (admin:admin) 'admin/'>], [<URLResolver <module 'hopskotch_auth.urls' from './hopskotch_auth/urls.py'> (None:None) 'hopauth/'>], [<URLResolver <module 'mozilla_django_oidc.urls' from '/usr/local/lib/python3.8/site-packages/mozilla_django_oidc/urls.py'> (None:None) 'auth/'>]], 'path': 'favicon.ico'}

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.8/site-packages/django/template/base.py", line 828, in _resolve_lookup
    current = current[bit]
TypeError: 'URLResolver' object is not subscriptable

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.8/site-packages/django/template/base.py", line 836, in _resolve_lookup
    current = getattr(current, bit)
AttributeError: 'URLResolver' object has no attribute 'name'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.8/site-packages/django/template/base.py", line 842, in _resolve_lookup
    current = current[int(bit)]
ValueError: invalid literal for int() with base 10: 'name'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.8/site-packages/django/template/base.py", line 847, in _resolve_lookup
    raise VariableDoesNotExist("Failed lookup for key "
django.template.base.VariableDoesNotExist: Failed lookup for key [name] in <URLResolver <URLPattern list> (admin:admin) 'admin/'>
2021-04-13 09:27:59,847 DEBUG [django.template:867] base 11 140031216490304 Exception while resolving variable 'name' in template 'unknown'.
Traceback (most recent call last):
  File "/usr/local/lib/python3.8/site-packages/django/core/handlers/exception.py", line 34, in inner
    response = get_response(request)
  File "/usr/local/lib/python3.8/site-packages/django/core/handlers/base.py", line 100, in _get_response
    resolver_match = resolver.resolve(request.path_info)
  File "/usr/local/lib/python3.8/site-packages/django/urls/resolvers.py", line 575, in resolve
    raise Resolver404({'tried': tried, 'path': new_path})
django.urls.exceptions.Resolver404: {'tried': [[<URLPattern ''>], [<URLPattern 'health_check/'>], [<URLResolver <URLPattern list> (admin:admin) 'admin/'>], [<URLResolver <module 'hopskotch_auth.urls' from './hopskotch_auth/urls.py'> (None:None) 'hopauth/'>], [<URLResolver <module 'mozilla_django_oidc.urls' from '/usr/local/lib/python3.8/site-packages/mozilla_django_oidc/urls.py'> (None:None) 'auth/'>]], 'path': 'favicon.ico'}

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.8/site-packages/django/template/base.py", line 828, in _resolve_lookup
    current = current[bit]
TypeError: 'URLResolver' object is not subscriptable

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.8/site-packages/django/template/base.py", line 836, in _resolve_lookup
    current = getattr(current, bit)
AttributeError: 'URLResolver' object has no attribute 'name'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.8/site-packages/django/template/base.py", line 842, in _resolve_lookup
    current = current[int(bit)]
ValueError: invalid literal for int() with base 10: 'name'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.8/site-packages/django/template/base.py", line 847, in _resolve_lookup
    raise VariableDoesNotExist("Failed lookup for key "
django.template.base.VariableDoesNotExist: Failed lookup for key [name] in <URLResolver <module 'hopskotch_auth.urls' from './hopskotch_auth/urls.py'> (None:None) 'hopauth/'>
2021-04-13 09:27:59,847 DEBUG [django.template:867] base 11 140031216490304 Exception while resolving variable 'name' in template 'unknown'.
Traceback (most recent call last):
  File "/usr/local/lib/python3.8/site-packages/django/core/handlers/exception.py", line 34, in inner
    response = get_response(request)
  File "/usr/local/lib/python3.8/site-packages/django/core/handlers/base.py", line 100, in _get_response
    resolver_match = resolver.resolve(request.path_info)
  File "/usr/local/lib/python3.8/site-packages/django/urls/resolvers.py", line 575, in resolve
    raise Resolver404({'tried': tried, 'path': new_path})
django.urls.exceptions.Resolver404: {'tried': [[<URLPattern ''>], [<URLPattern 'health_check/'>], [<URLResolver <URLPattern list> (admin:admin) 'admin/'>], [<URLResolver <module 'hopskotch_auth.urls' from './hopskotch_auth/urls.py'> (None:None) 'hopauth/'>], [<URLResolver <module 'mozilla_django_oidc.urls' from '/usr/local/lib/python3.8/site-packages/mozilla_django_oidc/urls.py'> (None:None) 'auth/'>]], 'path': 'favicon.ico'}

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.8/site-packages/django/template/base.py", line 828, in _resolve_lookup
    current = current[bit]
TypeError: 'URLResolver' object is not subscriptable

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.8/site-packages/django/template/base.py", line 836, in _resolve_lookup
    current = getattr(current, bit)
AttributeError: 'URLResolver' object has no attribute 'name'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.8/site-packages/django/template/base.py", line 842, in _resolve_lookup
    current = current[int(bit)]
ValueError: invalid literal for int() with base 10: 'name'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.8/site-packages/django/template/base.py", line 847, in _resolve_lookup
    raise VariableDoesNotExist("Failed lookup for key "
django.template.base.VariableDoesNotExist: Failed lookup for key [name] in <URLResolver <module 'mozilla_django_oidc.urls' from '/usr/local/lib/python3.8/site-packages/mozilla_django_oidc/urls.py'> (None:None) 'auth/'>

[cnweaver]

Yes, this is a known issue. It mostly happens when user agents request favicon.ico, which doesn't exist. I have no idea why Django reacts so badly to this; I've tried to fix it before but it was never a very priority sine it doesn't do much harm except pollute the logs.