diff options
| -rw-r--r-- | synapse/util/caches/descriptors.py | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/synapse/util/caches/descriptors.py b/synapse/util/caches/descriptors.py index 83bfec2f02..362944bc51 100644 --- a/synapse/util/caches/descriptors.py +++ b/synapse/util/caches/descriptors.py @@ -293,7 +293,7 @@ class CacheListDescriptor(object): # we can insert the new deferred into the cache. for arg in missing: observer = ret_d.observe() - observer.addCallback(lambda r, arg: r[arg], arg) + observer.addCallback(lambda r, arg: r.get(arg, None), arg) observer = ObservableDeferred(observer) |