Missing support for immediately invoked function expressions (IIFE)

[encody]

Just playing around with the playground, this code fails to run:

const f = (() => {})();

return <></>;

With this error:

Execution error:
Unsupported member type: 'ArrowFunctionExpression'
Error: Unsupported member type: 'ArrowFunctionExpression'
    at t.value (https://near.org/_next/static/chunks/f3857751.16e15a3bc421ed0c.js:1:141230)
    at t.value (https://near.org/_next/static/chunks/f3857751.16e15a3bc421ed0c.js:1:142716)
    at t.value (https://near.org/_next/static/chunks/f3857751.16e15a3bc421ed0c.js:1:128336)
    at https://near.org/_next/static/chunks/f3857751.16e15a3bc421ed0c.js:1:149725
    at Array.forEach (<anonymous>)
    at t.value (https://near.org/_next/static/chunks/f3857751.16e15a3bc421ed0c.js:1:149584)
    at t.value (https://near.org/_next/static/chunks/f3857751.16e15a3bc421ed0c.js:1:150144)
    at t.value (https://near.org/_next/static/chunks/f3857751.16e15a3bc421ed0c.js:1:158210)
    at t.value (https://near.org/_next/static/chunks/f3857751.16e15a3bc421ed0c.js:1:157614)
    at https://near.org/_next/static/chunks/f3857751.16e15a3bc421ed0c.js:1:164529
    at uI (https://near.org/_next/static/chunks/framework-c16fc4c01675a4d8.js:9:84130)
    at uY (https://near.org/_next/static/chunks/framework-c16fc4c01675a4d8.js:9:90512)
    at e (https://near.org/_next/static/chunks/framework-c16fc4c01675a4d8.js:9:111124)
    at https://near.org/_next/static/chunks/framework-c16fc4c01675a4d8.js:9:111135
    at oI (https://near.org/_next/static/chunks/framework-c16fc4c01675a4d8.js:9:111647)
    at oS (https://near.org/_next/static/chunks/framework-c16fc4c01675a4d8.js:9:95017)
    at x (https://near.org/_next/static/chunks/framework-c16fc4c01675a4d8.js:33:1373)
    at MessagePort.T (https://near.org/_next/static/chunks/framework-c16fc4c01675a4d8.js:33:1903)

This code also fails:

const f = (function () {})();

return <></>;

The error is similar:

Execution error:
Unsupported member type: 'FunctionExpression'
Error: Unsupported member type: 'FunctionExpression'
    at t.value (https://near.org/_next/static/chunks/f3857751.16e15a3bc421ed0c.js:1:141230)
    at t.value (https://near.org/_next/static/chunks/f3857751.16e15a3bc421ed0c.js:1:142716)
    at t.value (https://near.org/_next/static/chunks/f3857751.16e15a3bc421ed0c.js:1:128336)
    at https://near.org/_next/static/chunks/f3857751.16e15a3bc421ed0c.js:1:149725
    at Array.forEach (<anonymous>)
    at t.value (https://near.org/_next/static/chunks/f3857751.16e15a3bc421ed0c.js:1:149584)
    at t.value (https://near.org/_next/static/chunks/f3857751.16e15a3bc421ed0c.js:1:150144)
    at t.value (https://near.org/_next/static/chunks/f3857751.16e15a3bc421ed0c.js:1:158210)
    at t.value (https://near.org/_next/static/chunks/f3857751.16e15a3bc421ed0c.js:1:157614)
    at https://near.org/_next/static/chunks/f3857751.16e15a3bc421ed0c.js:1:164529
    at uI (https://near.org/_next/static/chunks/framework-c16fc4c01675a4d8.js:9:84130)
    at uY (https://near.org/_next/static/chunks/framework-c16fc4c01675a4d8.js:9:90512)
    at e (https://near.org/_next/static/chunks/framework-c16fc4c01675a4d8.js:9:111124)
    at https://near.org/_next/static/chunks/framework-c16fc4c01675a4d8.js:9:111135
    at oI (https://near.org/_next/static/chunks/framework-c16fc4c01675a4d8.js:9:111647)
    at oS (https://near.org/_next/static/chunks/framework-c16fc4c01675a4d8.js:9:95017)
    at x (https://near.org/_next/static/chunks/framework-c16fc4c01675a4d8.js:33:1373)
    at MessagePort.T (https://near.org/_next/static/chunks/framework-c16fc4c01675a4d8.js:33:1903)

Curiously, giving the function a name and immediately executing it does not render the same error, though it theoretically is logically equivalent:

let f;
{
  const g = () => {};
  f = g();
}

return <></>;