State sometimes does not match state of last build

[ellert]

The state reported for a package in a release is sometimes different from the state reported for the last build. E.g.

Here the result of the last build is reported as a failed, but the state is reported as ok:

Here the result of the last build is reported as ok, but the state is reported as failing.

[mizdebsk]

Confirmed, there is inconsistency in database.
Package state should always be equal to state of the latest build.

For performance package state is stored in database as denormalized field, which may outdated as the following query shows:

koschei=> select count(*) from package p join build b on b.id=p.last_build_id where p.last_complete_build_state<>b.state;
 count 
-------
    25
(1 row)

The count is changing quite often (several times per minute).
This needs further investigation.