Unlocalize line numbers and ids in debug 500 view.

While using USE_L10N, line numbers and IDs were printed as comma (or
locale equivalent) separated values.

Thanks Kronuz for the report and intial patch.

Fixes #20861.

django/views/debug.py

@@ -227,7 +227,7 @@ class ExceptionReporter(object):
         return "File exists"
 
     def get_traceback_data(self):
-        "Return a Context instance containing traceback information."
+        """Return a dictionary containing traceback information."""
 
         if self.exc_type and issubclass(self.exc_type, TemplateDoesNotExist):
             from django.template.loader import template_source_loaders
@@ -295,13 +295,13 @@ class ExceptionReporter(object):
     def get_traceback_html(self):
         "Return HTML version of debug 500 HTTP error page."
         t = Template(TECHNICAL_500_TEMPLATE, name='Technical 500 template')
-        c = Context(self.get_traceback_data())
+        c = Context(self.get_traceback_data(), use_l10n=False)
         return t.render(c)
 
     def get_traceback_text(self):
         "Return plain text version of debug 500 HTTP error page."
         t = Template(TECHNICAL_500_TEXT_TEMPLATE, name='Technical 500 template')
-        c = Context(self.get_traceback_data(), autoescape=False)
+        c = Context(self.get_traceback_data(), autoescape=False, use_l10n=False)
         return t.render(c)
 
     def get_template_exception_info(self):

tests/view_tests/tests/test_debug.py

@@ -5,6 +5,7 @@ from __future__ import unicode_literals
 
 import inspect
 import os
+import re
 import shutil
 import sys
 from tempfile import NamedTemporaryFile, mkdtemp, mkstemp
@@ -69,6 +70,21 @@ class DebugViewTests(TestCase):
             self.assertRaises(BrokenException, self.client.get,
                 reverse('view_exception', args=(n,)))
 
+    def test_non_l10ned_numeric_ids(self):
+        """
+        Numeric IDs and fancy traceback context blocks line numbers shouldn't be localized.
+        """
+        with self.settings(DEBUG=True, USE_L10N=True):
+            response = self.client.get('/views/raises500/')
+            # We look for a HTML fragment of the form
+            # '<div class="context" id="c38123208">', not '<div class="context" id="c38,123,208"'
+            self.assertContains(response, '<div class="context" id="', status_code=500)
+            match = re.search(b'<div class="context" id="(?P<id>[^"]+)">', response.content)
+            self.assertFalse(match is None)
+            id_repr = match.group('id')
+            self.assertFalse(re.search(b'[^c\d]', id_repr),
+                             "Numeric IDs in debug response HTML page shouldn't be localized (value: %s)." % id_repr)
+
     def test_template_exceptions(self):
         for n in range(len(except_args)):
             try:

tests/view_tests/urls.py

@@ -49,6 +49,7 @@ urlpatterns = patterns('',
     (r'raises400/$', views.raises400),
     (r'raises403/$', views.raises403),
     (r'raises404/$', views.raises404),
+    (r'raises500/$', views.raises500),
 
     # i18n views
     (r'^i18n/', include('django.conf.urls.i18n')),

tests/view_tests/views.py

@@ -31,6 +31,14 @@ def raises(request):
     except Exception:
         return technical_500_response(request, *sys.exc_info())
 
+def raises500(request):
+    # We need to inspect the HTML generated by the fancy 500 debug view but
+    # the test client ignores it, so we send it explicitly.
+    try:
+        raise Exception
+    except Exception:
+        return technical_500_response(request, *sys.exc_info())
+
 def raises400(request):
     raise SuspiciousOperation