"Unexpected Token" for async arrow IIFE

[spalger]

Using eslint 4.1.7 I am getting a syntax error with this code:

(async () => {

}());

Unexpected token at line 3 col 2

[spalger]

This only occurs on arrow functions. (async function () {}()); works fine.

[jmm]

I don't think that input is valid. AsyncArrowFunction is an AssignmentExpression like ArrowFunction and this is a syntax error:

() => {}();

It has to be

(() => {})();

There was a bug in Babel 5.x that allowed the former, but apparently it doesn't extend to async arrows.

[spalger]

hmm, interesting