[Django] #31868: Plural forms expression could be dangerous

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Aug 8, 2020, 10:31:47 AM8/8/20

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#31868: Plural forms expression could be dangerous
------------------------------------------------+------------------------
Reporter: Paul | Owner: nobody
Type: Bug | Status: new
Component: Internationalization | Version: 3.1
Severity: Normal | Keywords:
Triage Stage: Unreviewed | Has patch: 0
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
------------------------------------------------+------------------------
Somewhere around the end of July 2020, this error started occurring with
my website. The code has not been changed for ages, except for several
translations added in the .po file.
The Latin .po file was added two years ago. Everything had been working
fine until last week, when 500 errors started bumping for any Latin po
file usage (i.e. translation.activate('la')).
I’ve tried:
1. Reverting to the early-July version of the .po files;
2. Removing the ‘Plural Forms’ line from the .po files;
3. Removing the .po files at all.
This does not help at all. The only thing which eliminates the issue is
setting i18N = False in settings.py.

Here is the complete traceback:

Traceback:

File
"/home/robbit/webapps/django_tran_bot/lib/python2.7/Django-1.11.29-py2.7.egg/django/core/handlers/exception.py"
in inner
41. response = get_response(request)

File
"/home/robbit/webapps/django_tran_bot/lib/python2.7/Django-1.11.29-py2.7.egg/django/core/handlers/base.py"
in _legacy_get_response
249. response = self._get_response(request)

File
"/home/robbit/webapps/django_tran_bot/lib/python2.7/Django-1.11.29-py2.7.egg/django/core/handlers/base.py"
in _get_response
187. response = self.process_exception_by_middleware(e,
request)

File
"/home/robbit/webapps/django_tran_bot/lib/python2.7/Django-1.11.29-py2.7.egg/django/core/handlers/base.py"
in _get_response
185. response = wrapped_callback(request,
*callback_args, **callback_kwargs)

File "/home/robbit/webapps/django_tran_bot/tran_bot/core/decorators.py" in
_view
92. response = view_func(request, *args, **kwargs)

File
"/home/robbit/webapps/django_tran_bot/lib/python2.7/Django-1.11.29-py2.7.egg/django/views/generic/base.py"
in view
68. return self.dispatch(request, *args, **kwargs)

File
"/home/robbit/webapps/django_tran_bot/lib/python2.7/Django-1.11.29-py2.7.egg/django/views/generic/base.py"
in dispatch
88. return handler(request, *args, **kwargs)

File "/home/robbit/webapps/django_tran_bot/tran_bot/translation/views.py"
in get
597.
for_extension=request.is_ajax())

File
"/home/robbit/webapps/django_tran_bot/tran_bot/translation/manager.py" in
find_translations
186. if can_sort_translations or (not trans in related and
not trans.from_word_form.for_link_str in related_links):

File
"/home/robbit/webapps/django_tran_bot/lib/python2.7/Django-1.11.29-py2.7.egg/django/utils/functional.py"
in __get__
35. res = instance.__dict__[self.name] = self.func(instance)

File "/home/robbit/webapps/django_tran_bot/tran_bot/word/models/base.py"
in for_link_str
836. return strip_tags(unicode(self))

File "/home/robbit/webapps/django_tran_bot/tran_bot/word/mixins.py" in
__str__
177. return parse_markdown(main_field_value, self.lang())

File "/home/robbit/webapps/django_tran_bot/tran_bot/core/utils/html.py" in
parse_markdown
167. with translation.override('uk' if to_lang else from_lang):

File
"/home/robbit/webapps/django_tran_bot/lib/python2.7/Django-1.11.29-py2.7.egg/django/utils/translation/__init__.py"
in __enter__
181. activate(self.language)

File
"/home/robbit/webapps/django_tran_bot/lib/python2.7/Django-1.11.29-py2.7.egg/django/utils/translation/__init__.py"
in activate
166. return _trans.activate(language)

File
"/home/robbit/webapps/django_tran_bot/lib/python2.7/Django-1.11.29-py2.7.egg/django/utils/translation/trans_real.py"
in activate
239. _active.value = translation(language)

File
"/home/robbit/webapps/django_tran_bot/lib/python2.7/Django-1.11.29-py2.7.egg/django/utils/translation/trans_real.py"
in translation
228. _translations[language] = DjangoTranslation(language)

File
"/home/robbit/webapps/django_tran_bot/lib/python2.7/Django-1.11.29-py2.7.egg/django/utils/translation/trans_real.py"
in __init__
129. self._add_installed_apps_translations()

File
"/home/robbit/webapps/django_tran_bot/lib/python2.7/Django-1.11.29-py2.7.egg/django/utils/translation/trans_real.py"
in _add_installed_apps_translations
177. translation = self._new_gnu_trans(localedir)

File
"/home/robbit/webapps/django_tran_bot/lib/python2.7/Django-1.11.29-py2.7.egg/django/utils/translation/trans_real.py"
in _new_gnu_trans
156. fallback=use_null_fallback)

File "/usr/lib64/python2.7/gettext.py" in translation
480. t = _translations.setdefault(key, class_(fp))

File "/usr/lib64/python2.7/gettext.py" in __init__
180. self._parse(fp)

File "/usr/lib64/python2.7/gettext.py" in _parse
317. self.plural = c2py(plural)

File "/usr/lib64/python2.7/gettext.py" in c2py
93. raise ValueError, 'plural forms expression could be
dangerous'

--
Ticket URL: <https://code.djangoproject.com/ticket/31868>
Django <https://code.djangoproject.com/>
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Django

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Aug 8, 2020, 2:55:48 PM8/8/20

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#31868: Plural forms expression could be dangerous

-------------------------------------+-------------------------------------
Changes (by felixxm):

* status: new => closed
* resolution: => duplicate

Old description:

New description:

Comment:

Duplicate of #22284. Moreover Python 2.7 and Django 1.11 are no longer
supported.