[Sqlalchemy-tickets] Issue #3124: Infinite loop when using create_all() on an Enum(metadata=...) in SQLite (zzzeek/sqlalchemy)

[eevee <iss...@bi...>]

New issue 3124: Infinite loop when using create_all() on an Enum(metadata=...) in SQLite
https://bitbucket.org/zzzeek/sqlalchemy/issue/3124/infinite-loop-when-using-create_all-on-an

eevee:

Reported here, but seen someone else experience it too: http://stackoverflow.com/q/24720380/17875

My diagnosis from figuring it out with the someone else on IRC:

    18:43 <!eevee> somehow calling self._on_metadata_create within the metadata's create event is adding itself as an event listener again
    18:44 <!eevee> because, i think, it re-creates a dialect-specific enum with the same args...
    18:44 <!eevee> looks pretty clearly like a bug wow
    18:44 <@Zhorken> it specifically hangs with SQLite
    18:44 <@Zhorken> or at least, not with Postgres
    18:45 <!eevee> ah, postgres has a real enum type; sqlite doesn't so it gets a fallback