message: Add diagnostic log to catch events without an ID
  This adds some temporary logging to investigate
diff: @@ -495,6 +495,12 @@ module.exports = createReactClass({
  return null;
  }
  const eventId = this.props.mxEvent.getId();
  + if (!eventId) {
  + // XXX: Temporary diagnostic logging for https://github.com/vector-im/riot-web/issues/11120
  + console.error("EventTile attempted to get relations for an event without an ID");
  + // Use event's special `toJSON` method to log key data.
  + console.log(JSON.stringify(this.props.mxEvent, null, 4));
  + }
  return this.props.getRelationsForEvent(eventId, "m.annotation", "m.reaction");
  },
  