Merge remote-tracking branch 'origin/develop' into rav/federation_client_async

synapse/events/__init__.py

@@ -189,8 +189,14 @@ class EventBase(object):
     redacts = _event_dict_property("redacts", None)
     room_id = _event_dict_property("room_id")
     sender = _event_dict_property("sender")
+    state_key = _event_dict_property("state_key")
+    type = _event_dict_property("type")
     user_id = _event_dict_property("sender")
 
+    @property
+    def event_id(self) -> str:
+        raise NotImplementedError()
+
     @property
     def membership(self):
         return self.content["membership"]
@@ -281,10 +287,7 @@ class FrozenEvent(EventBase):
         else:
             frozen_dict = event_dict
 
-        self.event_id = event_dict["event_id"]
-        self.type = event_dict["type"]
-        if "state_key" in event_dict:
-            self.state_key = event_dict["state_key"]
+        self._event_id = event_dict["event_id"]
 
         super(FrozenEvent, self).__init__(
             frozen_dict,
@@ -294,6 +297,10 @@ class FrozenEvent(EventBase):
             rejected_reason=rejected_reason,
         )
 
+    @property
+    def event_id(self) -> str:
+        return self._event_id
+
     def __str__(self):
         return self.__repr__()
 
@@ -332,9 +339,6 @@ class FrozenEventV2(EventBase):
             frozen_dict = event_dict
 
         self._event_id = None
-        self.type = event_dict["type"]
-        if "state_key" in event_dict:
-            self.state_key = event_dict["state_key"]
 
         super(FrozenEventV2, self).__init__(
             frozen_dict,

synapse/util/async_helpers.py

@@ -73,6 +73,10 @@ class ObservableDeferred(object):
         def errback(f):
             object.__setattr__(self, "_result", (False, f))
             while self._observers:
+                # This is a little bit of magic to correctly propagate stack
+                # traces when we `await` on one of the observer deferreds.
+                f.value.__failure__ = f
+
                 try:
                     # TODO: Handle errors here.
                     self._observers.pop().errback(f)