Actually fetch state for new backwards extremeties when backfilling.

1 files changed, 5 insertions, 1 deletions

diff --git a/synapse/federation/federation_client.py b/synapse/federation/federation_client.py

index 4b3bf97835..6febc8618c 100644
--- a/synapse/federation/federation_client.py
+++ b/synapse/federation/federation_client.py
@@ -168,7 +168,11 @@ class FederationClient(FederationBase):
         for i, pdu in enumerate(pdus):
             pdus[i] = yield self._check_sigs_and_hash(pdu)
 
-            # FIXME: We should handle signature failures more gracefully.
+        # FIXME: We should handle signature failures more gracefully.
+        pdus[:] = yield defer.gatherResults(
+            [self._check_sigs_and_hash(pdu) for pdu in pdus],
+            consumeErrors=True,
+        ).addErrback(unwrapFirstError)
 
         defer.returnValue(pdus)