#34691: Add a system check for unmatched URL paths' < / >
------------------------------------------------+------------------------
               Reporter:  Adam Johnson          |          Owner:  nobody
                   Type:  Cleanup/optimization  |         Status:  new
              Component:  Core (URLs)           |        Version:  dev
               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                     |
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 Currently, unmatched angle brackets are silently ignored:

 {{{
     path('<int:question_id/vote/', views.vote, name='vote'),
 }}}

 This leads to a frustrating debugging experience, where a 404 or
 `NoReverseMatch` could occur and only the eagle-eyed could spot why.
 Similar to the `^`/`$` system check added in #28663, I propose a new check
 in `RoutePattern.check()` for unmatched `<` or `>`. It's rather unlikely
 those characters are legitimately used in URLs.

 (Inspired by [https://forum.djangoproject.com/t/noreversematch-at-end-of-
 tutorial-4/6513/9 a new user making this mistake] and asking for help on
 the forum.)

-- 
Ticket URL: <https://code.djangoproject.com/ticket/34691>
Django <https://code.djangoproject.com/>
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