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Diffstat (limited to 'synapse/handlers/directory.py')
| -rw-r--r-- | synapse/handlers/directory.py | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/synapse/handlers/directory.py b/synapse/handlers/directory.py index 2ea52257cb..d31b0fbb17 100644 --- a/synapse/handlers/directory.py +++ b/synapse/handlers/directory.py @@ -485,7 +485,8 @@ class DirectoryHandler: ) ) if canonical_alias: - room_aliases.append(canonical_alias) + # Ensure we do not mutate room_aliases. + room_aliases = room_aliases + [canonical_alias] if not self.config.roomdirectory.is_publishing_room_allowed( user_id, room_id, room_aliases |