New submission from Tuure Laurinolli <>:

If there are no challengers registered, PAM throws an exception when doing
string formatting on line 'logger and'challengers registered: %s' %
candidates)' in challenge(). If there are no challengers, candidates will be an
empty tuple, which causes the formatting to fail.

messages: 290
nosy: tazle
priority: bug
status: unread
title: PluggableAuthenticationMiddleware throws exception on challenge()

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