`InternalServerError` when trying to coalesce with an existing link property value about edgedb HOT 2 CLOSED

@raddevon The issue was with the [], please explicitly type your empty arrays for now.

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I have found the following workaround for this issue. In order to either add Doc to the queue at position 2 or add position 2 to his positions if he is already in the queue (clone the Doc!), you can do this:

with 
doc := assert_single((
  select Person
  filter .name = 'Doc'
)),
queue := (
  select Queue {
    id,
    doc_position := (
      select .people {
        ps := (@position, Queue.id)
      }
      filter .id = doc.id 
    )
  }
  filter .id = <uuid>$queue_id
),
ps := assert_single(queue.doc_position.ps.0) ?? [],
result := (update queue
set {
  people += (
    select doc {
      @position := ps ++ [2]
    }
  )
})
select assert_single(result)

I think it is rather noisy so if you have a better solution, please post!
Also I do not really understand why I get additional results from other Queues if I do not add the Queue.id to the tuple (and later throw it away by only using .0). If someone could explain this, that would also be great!

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