Hello,
I have compiled Dovecot  2.3.3 from sources but I have problems with authentication.
I tried to rebuild Dovecot 2.3.2.1 but the error persists.
I attach a .txt file with the information requested to report a bug.
My main mail server is fallen, (the same for the test server) I will send the report from a Gmail address.
If you need additional information I will be at your disposal.