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-rw-r--r--synapse/util/caches/descriptors.py4
1 files changed, 2 insertions, 2 deletions
diff --git a/synapse/util/caches/descriptors.py b/synapse/util/caches/descriptors.py
index 4bbb16ed3c..5be4097279 100644
--- a/synapse/util/caches/descriptors.py
+++ b/synapse/util/caches/descriptors.py
@@ -311,12 +311,12 @@ class CacheListDescriptor(object):
 
                 try:
                     res = cache.get(tuple(key))
-                    if not res.called:
+                    if not res.has_succeeded():
                         res = res.observe()
                         res.addCallback(lambda r, arg: (arg, r), arg)
                         cached_defers[arg] = res
                     else:
-                        results[arg] = res.result
+                        results[arg] = res.get_result()
                 except KeyError:
                     missing.append(arg)