Merge commit '6a8fd03ac' into anoa/dinsic_release_1_21_x

* commit '6a8fd03ac':
  1.21.0rc2
  1.21.0rc2
  Fix bug in remote thumbnail search (#8438)
  Fix DB query on startup for negative streams. (#8447)
  Convert additional templates to Jinja (#8444)
  Fix malformed log line in new federation "catch up" logic (#8442)
  Do not expose the experimental appservice login flow to clients. (#8440)
  update changelog
  fix a logging error in thumbnailer (#8435)
  changelog fixes
  fix version number

1 files changed, 1 insertions, 1 deletions

diff --git a/synapse/federation/sender/per_destination_queue.py b/synapse/federation/sender/per_destination_queue.py

index 2657767fd1..bc99af3fdd 100644
--- a/synapse/federation/sender/per_destination_queue.py
+++ b/synapse/federation/sender/per_destination_queue.py
@@ -490,7 +490,7 @@ class PerDestinationQueue:
                 )
 
             if logger.isEnabledFor(logging.INFO):
-                rooms = (p.room_id for p in catchup_pdus)
+                rooms = [p.room_id for p in catchup_pdus]
                 logger.info("Catching up rooms to %s: %r", self._destination, rooms)
 
             success = await self._transaction_manager.send_new_transaction(