Check whether prev_content or prev_sender is set before trying to rollback state
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@ -357,14 +357,19 @@ class SyncRestServlet(RestServlet):
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if prev_event_id is None:
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del result[event_key]
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else:
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result[event_key] = FrozenEvent({
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"type": timeline_event.type,
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"state_key": timeline_event.state_key,
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"content": timeline_event.unsigned['prev_content'],
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"sender": timeline_event.unsigned['prev_sender'],
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"event_id": prev_event_id,
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"room_id": timeline_event.room_id,
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})
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prev_content = timeline_event.unsigned.get('prev_content')
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prev_sender = timeline_event.unsigned.get('prev_sender')
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if prev_content and prev_sender:
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result[event_key] = FrozenEvent({
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"type": timeline_event.type,
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"state_key": timeline_event.state_key,
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"content": prev_content,
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"sender": prev_sender,
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"event_id": prev_event_id,
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"room_id": timeline_event.room_id,
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})
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else:
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del result[event_key]
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logger.debug("New value: %r", result.get(event_key))
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return result
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