This was originally added when we first added a `MemoryHandler` to the default
log config back in https://github.com/matrix-org/synapse/pull/8040, to ensure
that we didn't explode with an infinite loop if there was an error formatting
the logs.

Since then, we made additional improvements to logging which make this
workaround redundant. In particular:

 * we no longer attempt to log un-UTF8-decodable byte sequences, which were the
   most likely cause of an error in the first place.

 * https://github.com/matrix-org/synapse/pull/8268 ensures that in the unlikely
   case that there *is* an error, it won't cause an infinite loop.

* Allow unused ignores in "bleeding edge" CI

Where "bleeding edge" means the Twisted Trunk and Latest Deps jobs.

Follow up from #12531.
Resolves #12574.

* Use `--extras all` in latest deps mypy CI

Twisted trunk job already does this.

Missed in #12531.

* changelog

The status code of requests must always be set, regardless of client
disconnection, otherwise they will always be logged as 200!.

Broken for `respond_with_json` in
f48792ee.
Broken for `respond_with_json_bytes` in
3e58ce72.
Broken for `respond_with_html_bytes` in
ea26e9a9.

Signed-off-by: Sean Quah <seanq@element.io>

This reverts commit 5a320baa.
This reverts commit f282d5fc.
This reverts commit ce6ecdd4.

Twisted trunk job already does this.

Missed in #12531.

Where "bleeding edge" means the Twisted Trunk and Latest Deps jobs.

Follow up from #12531.
Resolves #12574.

When configuring the return values of mocks, prefer awaitables from
`make_awaitable` over `defer.succeed`. `Deferred`s are only awaitable
once, so it is inappropriate for a mock to return the same `Deferred`
multiple times.

Also update `run_in_background` to support functions that return
arbitrary awaitables.

Signed-off-by: Sean Quah <seanq@element.io>

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

Not enforced in config yet. One day.

Over time we've begun to use newer versions of mypy, typeshed, stub
packages---and of course we've improved our own annotations. This makes
some type ignore comments no longer necessary. I have removed them.

There was one exception: a module that imports `select.epoll`. The
ignore is redundant on Linux, but I've kept it ignored for those of us
who work on the source tree using not-Linux. (#11771)

I'm more interested in the config line which enforces this. I want
unused ignores to be reported, because I think it's useful feedback when
annotating to know when you've fixed a problem you had to previously
ignore.

* Installing extras before typechecking

Lacking an easy way to install all extras generically, let's bite the bullet and
make install the hand-maintained `all` extra before typechecking.

Now that https://github.com/matrix-org/backend-meta/pull/6 is merged to
the release/v1 branch.

Co-authored-by: Brad Murray <bradtgmurray@gmail.com>
Co-authored-by: Andrew Morgan <andrewm@element.io>

Synapse 1.58.0rc2 (2022-04-26)
==============================

This release candidate fixes bugs related to Synapse 1.58.0rc1's logic for handling device list updates.

Bugfixes
--------

- Fix a bug introduced in Synapse 1.58.0rc1 where the main process could consume excessive amounts of CPU and memory while handling sentry logging failures. ([\#12554](https://github.com/matrix-org/synapse/issues/12554))
- Fix a bug introduced in Synapse 1.58.0rc1 where opentracing contexts were not correctly sent to whitelisted remote servers with device lists updates. ([\#12555](https://github.com/matrix-org/synapse/issues/12555))

Internal Changes
----------------

- Reduce unnecessary work when handling remote device list updates. ([\#12557](https://github.com/matrix-org/synapse/issues/12557))

Co-authored-by: David Robertson <davidr@element.io>

This seems to make dch happy when we prepare the release.

Poetry now manages the project version in pyproject.toml.

Try to avoid an OOM by checking fewer extremities.

Generally this is a big rewrite of _maybe_backfill, to try and fix some of the TODOs and other problems in it. It's best reviewed commit-by-commit.

* Update config_documentation.md

Multiple calls to `EventsWorkerStore._get_events_from_cache_or_db` can
reuse the same database fetch, which is initiated by the first call.
Ensure that cancelling the first call doesn't cancel the other calls
sharing the same database fetch.

Signed-off-by: Sean Quah <seanq@element.io>

Signed-off-by: Sami Olmari <sami@olmari.fi>