message: turn NPE into a throw
diff: @@ -239,9 +239,13 @@ export function makeUserPermalink(userId) {
  export function makeRoomPermalink(roomId) {
  const permalinkBase = `${baseUrl}/#/${roomId}`;
  + if (!roomId) {
  + throw new Error("can't permalink a falsey roomId");
  + }
  +
  // If the roomId isn't actually a room ID, don't try to list the servers.
  // Aliases are already routable, and don't need extra information.
  - if (!roomId || roomId[0] !== '!') return permalinkBase;
  + if (roomId[0] !== '!') return permalinkBase;
  const client = MatrixClientPeg.get();
  const room = client.getRoom(roomId);
  