Django fails to show non-latin exception messages from PostgreSQL running on FastCGI

[Loststylus]

Run django via FastCGI (used nginx 0.6.x to deploy) with PosgreSQL. Try to execute some query, that will produce an error. If the error returned by PosgreSQL is not latin (Russian in my case), django tries to render an error page, but fails. nginx return a page with "Unhandled exception"

If you turn on debug in flup, you will see the traceback, that shows that django tries to force_unicode the error message and fails with UnicodeDecodeError, so the user cannot determine the problem.

I'll attach a flup error page with stack trace.

[Loststylus]

Flup stack trace for the django's debug system unicode decode error

[Aymeric Augustin]

Change UI/UX from NULL to False.

[Aymeric Augustin]

Change Easy pickings from NULL to False.

[Claude Paroz]

For better readability, here is the traceback contained in the attached html error page:

Traceback (most recent call last):
	  File "/var/lib/python-support/python2.6/flup/server/fcgi_base.py", line 558, in run
	    protocolStatus, appStatus = self.server.handler(self)
	  File "/var/lib/python-support/python2.6/flup/server/fcgi_base.py", line 1116, in handler
	    result = self.application(environ, start_response)
	  File "/usr/local/lib/python2.6/dist-packages/django/core/handlers/wsgi.py", line 239, in __call__
	    response = self.get_response(request)
	  File "/usr/local/lib/python2.6/dist-packages/django/core/handlers/base.py", line 128, in get_response
	    return self.handle_uncaught_exception(request, resolver, exc_info)
	  File "/usr/local/lib/python2.6/dist-packages/django/core/handlers/base.py", line 148, in handle_uncaught_exception
	    return debug.technical_500_response(request, *exc_info)
	  File "/usr/local/lib/python2.6/dist-packages/django/views/debug.py", line 39, in technical_500_response
	    html = reporter.get_traceback_html()
	  File "/usr/local/lib/python2.6/dist-packages/django/views/debug.py", line 97, in get_traceback_html
	    'exception_value': smart_unicode(self.exc_value, errors='replace'),
	  File "/usr/local/lib/python2.6/dist-packages/django/utils/encoding.py", line 35, in smart_unicode
	    return force_unicode(s, encoding, strings_only, errors)
	  File "/usr/local/lib/python2.6/dist-packages/django/utils/encoding.py", line 70, in force_unicode
	    raise DjangoUnicodeDecodeError(s, *e.args)
	DjangoUnicodeDecodeError: 'ascii' codec can't decode byte 0xd0 in position 0: ordinal not in range(128).
        You passed in ProgrammingError('\xd0\x92\xd1\x8b\xd1\x80\xd0\xb0\xd0\xb6\xd0\xb5\xd0\xbd\xd0\xb8\xd1\x8f SELECT DISTINCT ON \xd0\xb4\xd0\xbe\xd0\xbb\xd0\xb6\xd0\xbd\xd1\x8b \xd1\x81\xd0\xbe\xd0\xb2\xd0\xbf\xd0\xb0\xd0\xb4\xd0\xb0\xd1\x82\xd1\x8c \xd1\x81 \xd0\xb8\xd0\xb7\xd0\xbd\xd0\xb0\xd1\x87\xd0\xb0\xd0\xbb\xd1\x8c\xd0\xbd\xd1\x8b\xd0\xbc\xd0\xb8 \xd0\xb2\xd1\x8b\xd1\x80\xd0\xb0\xd0\xb6\xd0\xb5\xd0\xbd\xd0\xb8\xd1\x8f\xd0\xbc\xd0\xb8 ORDER BY\n',) (<class 'psycopg2.ProgrammingError'>)

[Claude Paroz]

This is quite certainly a duplicate of #12302, which should be fixed.