Hash of keyword is different between runtimes

[skydread1]

Problem

The Clojure function related to the error is the following:

(defn valid-cards-ids
  "Returns a list of all the valid cards ids."
  [deck-id & [uuid]] 
  (->> (full-deck deck-id true uuid)
       (map :id)
       set))

The error is actually due to the :id as a function in (map :id)

Calling the function from Unity:

Clojure.GetVar("clojure.core", "map")
    .invoke(RT.keyword(null, "id"), fullDeck)
// => {ChunkedCons}[nil nil nil nil nil nil ...]

In fact, looking at the valAt C# code:

public object valAt(object _param1, object _param2)
{
  object o = _param1;
  switch (Util.hash(o) & 3)
  {
    case 0:
      if (o == (object) Keyword.intern((string) null, "id"))
        return this.id;
      break;
    case 1:
      if (o == (object) Keyword.intern((string) null, "num"))
        return this.num;
      break;
    case 2:
      if (o == (object) Keyword.intern((string) null, "suit"))
        return this.suit;
      break;
    case 3:
      if (o == (object) Keyword.intern((string) null, "deck-id"))
        return this.deck\u002Did;
      break;
  }
  return RT.get(this.__extmap, _param1, _param2);
}

When :id is called, the hash is 1 not 0 as shown above.

So the hash of the keyword :id is different between compiling the valAt of PokerCard and the rumtime calculation.

I directly copied Clojure.dll and Magic.Runtime from my Nostrand to unity assets and got the same results.

So the difference is caused by the different dotnet runtimes.