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Fixed
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* No longer clear the ``RequestCache`` during the exception-handling phase (wait until response phase)
* It turns out all the ``process_exception`` methods get called until one returns a response, and only *then* do the ``process_response`` methods start getting called. The result was that on exception, some middlewares were unable to use RequestCache'd values in their response phase.
Updated
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* Replaced usage of 'django.conf.urls' with 'django.urls'