💻

• Would you like to work on a fix?

How are you using Babel?

@babel/cli

Input code

const v0 = [
    {
        5: 'foo',
        v20(val, x) {
            let v1 = {};
            v4(8, 'a', 7, 3, 'a');
            (() => {
                array[args]++;
                return f2[v14(10, true).attr.v6 - 2](y[2].attr);
            })().map(c, v0).map++;
        },
        null: 'a'
    },
    {
        name: 'Hugo',
        age: 8
    },
    {
        name: 'Sunny',
        age: 1
    }
];

Here is the REPL

Configuration file name

babel.config.json

Configuration

{
  "sourceType": "unambiguous",
  "presets": ["@babel/preset-env"],
  "plugins": [
    "@babel/plugin-transform-runtime"
  ]
}

Current and expected behavior

There is an error about self-executing function with arrow function transformed by babel.
Specifically, the original code can be run by node correctly, but there is an error transformed by babel as follows when run by node

function () {
    ^^^^^^^^

SyntaxError: Function statements require a function name

Environment

• babel
• • ├── @babel/cli@7.17.0=6
• • ├── @babel/generator@7.17.3
• • ├── @babel/plugin-transform-runtime@7.17.0
• • ├── @babel/preset-env@7.16.11
• Node: [v17.3.0]
• npm version [8.5.2]
• os [ubuntu 20.04]

Possible solution

No response

Additional context

No response