[4.1.x] Fixed CVE-2022-41323 -- Prevented locales being interpreted as regular expressions.

Thanks to Benjamin Balder Bach for the report.

tests/i18n/patterns/tests.py

@@ -215,6 +215,12 @@ class URLTranslationTests(URLTestCaseBase):
                     expected_link,
                 )
 
+    def test_locale_not_interepreted_as_regex(self):
+        with translation.override("e("):
+            # Would previously error:
+            # re.error: missing ), unterminated subpattern at position 1
+            reverse("users")
+
 
 class URLNamespaceTests(URLTestCaseBase):
     """