Map.get() does not play well with Map of optional types

[hasanaburayyan]

I tried this:

let m = MutMap<str?>{ };
m.set("a", nil);
let b = m.get("a");

assert(b == nil);

This happened:

ERROR: Map does not contain key: "a"

test/target/app.main.wsim.537045.tmp/.wing/preflight.js:9
       super(scope, id);
       const m = ({"a": "azz"});
>>     const b = ((obj, key) => { if (obj["key"] === undefined) throw new Error(`Map does not contain key: "${key}"`); return obj["key"]; })(m, "a");
     }
   }

I expected this:

b == nil

Is there a workaround?

No response

Component

Compiler

Wing Version

No response

Node.js Version

No response

Platform(s)

No response

Anything else?

Perhaps we might be able to change the output js to null instead of undefined?

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[hasanaburayyan]

closing as this is fixed #4523 (comment)