Possible bug with lowercasing of email address on signup

[alexwlchan]

I've had an email from somebody about a possible bug with signup.

Their steps:

1. Register with email address PyConUK@{name}.fastmail.co.uk.
2. They received a confirmation email at pyconuk@{name}.fastmail.co.uk – note the lowercasing.
3. Trying to log in with PyConUK@{name}.fastmail.co.uk and their password failed, but logging in with the lowercased address and the same password succeeded.

Email addresses should be case sensitive, so it shouldn't behave this way.

I’ve been unable to reproduce the error, but my original signup was with an all-lowercased email address. If I change the email address in my profile to PyConUK@{myname}.fastmail.co.uk, I can still log in with the mixed case version.

I can't see anywhere obvious where we're lowercasing the addresses, but raising here just in case – the person was pretty confident in what they’d seen. Even if we can't find the bug, it's useful to know in case somebody else has the same login problems.

[inglesp]

I can't reproduce this. Through the sign-up page, I created a new user with a mixed-case email address, and that email address was persisted to the database unchanged.