diff options
| -rw-r--r-- | changelog.d/16949.bugfix | 1 | ||||
| -rw-r--r-- | synapse/handlers/sync.py | 11 |
2 files changed, 10 insertions, 2 deletions
diff --git a/changelog.d/16949.bugfix b/changelog.d/16949.bugfix new file mode 100644 index 0000000000..99ed435d75 --- /dev/null +++ b/changelog.d/16949.bugfix @@ -0,0 +1 @@ +Fix various long-standing bugs which could cause incorrect state to be returned from `/sync` in certain situations. diff --git a/synapse/handlers/sync.py b/synapse/handlers/sync.py index 08fe4eb3b3..0aedb37f16 100644 --- a/synapse/handlers/sync.py +++ b/synapse/handlers/sync.py @@ -2837,7 +2837,7 @@ class SyncResultBuilder: if self.since_token: for joined_sync in self.joined: it = itertools.chain( - joined_sync.timeline.events, joined_sync.state.values() + joined_sync.state.values(), joined_sync.timeline.events ) for event in it: if event.type == EventTypes.Member: @@ -2849,13 +2849,20 @@ class SyncResultBuilder: newly_joined_or_invited_or_knocked_users.add( event.state_key ) + # If the user left and rejoined in the same batch, they + # count as a newly-joined user, *not* a newly-left user. + newly_left_users.discard(event.state_key) else: prev_content = event.unsigned.get("prev_content", {}) prev_membership = prev_content.get("membership", None) if prev_membership == Membership.JOIN: newly_left_users.add(event.state_key) + # If the user joined and left in the same batch, they + # count as a newly-left user, not a newly-joined user. + newly_joined_or_invited_or_knocked_users.discard( + event.state_key + ) - newly_left_users -= newly_joined_or_invited_or_knocked_users return newly_joined_or_invited_or_knocked_users, newly_left_users |