Symfony version(s) affected: 5.2.0
5.2-RC2 was not affected

Description

Using the new authenticator-based security,
and a custom authenticator (which extends AbstractAuthenticator),
users get this error after login: Call to a member function getUserLoader() on null

This is caused by PasswordMigratingListener, being triggered automatically since #39213, to assume than every Passport contains an UserBadge. This is nor documented (here) nor enforced by UserPassportInterface, so I believe it should be tested.

How to reproduce

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Possible Solution

PR coming soon