The `expire_access_token` didn't do what it sounded like it should do. What it
actually did was make Synapse enforce the 'time' caveat on macaroons used as
access tokens, but since our access token macaroons never contained such a
caveat, it was always a no-op.
(The code to add 'time' caveats was removed back in v0.18.5, in #1656)
Annoyingly, `current_state_events` table can include rejected events,
in which case the membership column will be null. To work around this
lets just always filter out null membership for now.
There was some inconsistent behaviour in the caching layer around how
exceptions were handled - particularly synchronously-thrown ones.
This seems to be most easily handled by pushing the creation of
ObservableDeferreds down from CacheDescriptor to the Cache.
This is a prerequisite for cross-signing, as it allows us to create other things
that live within the device namespace, so they can be used for signatures.
--------
- Fix a regression introduced in v1.2.0rc1 which led to incorrect labels on some prometheus metrics. ([\#5734](https://github.com/matrix-org/synapse/issues/5734))
-----BEGIN PGP SIGNATURE-----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=+JBn
-----END PGP SIGNATURE-----
Merge tag 'v1.2.0rc2' into develop
Bugfixes
--------
- Fix a regression introduced in v1.2.0rc1 which led to incorrect labels on some prometheus metrics. ([\#5734](https://github.com/matrix-org/synapse/issues/5734))
`None` is not a valid event id, so queuing up a database fetch for it seems
like a silly thing to do.
I considered making `get_event` return `None` if `event_id is None`, but then
its interaction with `allow_none` seemed uninituitive, and strong typing ftw.
* Fix servlet metric names
Co-Authored-By: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>
* Remove redundant check
* Cover all return paths
