This is not true.

Symfony has a lot of custom exceptions which can have another signature than the default Exception class of PHP. The UsernameNotFoundException is one of those: public __construct($message, $extraInformation = null, $code, Exception $previous = null)

well something is wrong.

FatalErrorException: Error: Wrong parameters for Exception([string $exception [, long $code [, Exception $previous = NULL]]]) in /path/to/AccountRepository.php line 68

where line 68 is
throw new UsernameNotFoundException(sprintf('Unable to find an active user object identified by "%s".', $username), null, 0, $e);

@wouterj : actually it changed in in commit: symfony/symfony@694c47c

which makes my PR wrong for 2.0

EDIT: which makes this a bug in the docs.. or a bug in symfony. Which is it?

This actually changed in master. See symfony/symfony#4935 and https://github.com/symfony/symfony/pull/4935/files#diff-3.

So this PR is correct, but it should be pointed to the master branch. :)

k thanks.. will do.