Not aware of an open ticket for this.
I came across it when I accidentally broke the feature even more (as
part of another piece of work),
then discovered there weren't tests for this.
So this is overall a low-priority drive-by fix.
Requires a fix to SyTest https://github.com/matrix-org/sytest/pull/1426
(as it depended on the bug).
<ol>
<li>
Add a test for purging rooms with `delete_local_events=False` \
Parameterised by room version, this test currently succeeds
on v2 but fails on v12.
This is because the condition checking for local events relies
on the old event ID format, which has not been used since v2.
</li>
<li>
Fix delete_local_events=False for room versions above v2 \
The event ID format changing means that we have to rely on `sender`
to know the origin of an event
</li>
</ol>
---------
Signed-off-by: Olivier 'reivilibre <oliverw@matrix.org>
Olivier 'reivilibre
2d06667661