purge_history API is broken

[4nd3r]

ran 3 times:

curl -X POST 'http://localhost:8008/_matrix/client/r0/admin/purge_history/!xyz:example.com/$xyz:example.com?access_token=xyz'

after that:

# grep -F 'events before cutoff' /var/log/matrix-synapse/homeserver.log | awk '{print $13}' 
1152
1152
1152

looks like purge doesn't work, because every run finds same amount of events for purge.

[4nd3r]

ok, looks like events are still purged for regular rooms, but not for e2e rooms.

[4nd3r]

apparently it's still broken for all rooms, because search still finds older events which should be purged.