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Fix bug in EventContext.deserialize. (#7393)

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This caused `prev_state_ids` to be incorrect if the state event was not
replacing an existing state entry.
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Erik Johnston 2020-05-05 14:17:27 +01:00 • committed by GitHub
parent 9858d5c362
commit 7941a70fa8
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4 changed files with 126 additions and 8 deletions
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7
synapse/events/snapshot.py
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@ -322,11 +322,14 @@ class _AsyncEventContextImpl(EventContext):
self._current_state_ids = yield self._storage.state.get_state_ids_for_group(
self.state_group
)
if self._prev_state_id and self._event_state_key is not None:
if self._event_state_key is not None:
self._prev_state_ids = dict(self._current_state_ids)
key = (self._event_type, self._event_state_key)
self._prev_state_ids[key] = self._prev_state_id
if self._prev_state_id:
self._prev_state_ids[key] = self._prev_state_id
else:
self._prev_state_ids.pop(key, None)
else:
self._prev_state_ids = self._current_state_ids