Problem with semicolons

1.md

Given code:

const bowerJSONPath = path.join(process.cwd(), 'bower.json')
const packageJSONPath = path.join(process.cwd(), 'package.json')

[bowerJSONPath, packageJSONPath].forEach((packagePath) => {/* */})

… generates such output:

'use strict';

var bowerJSONPath = path.join(process.cwd(), 'bower.json');
var packageJSONPath = path.join(process.cwd(), 'package.json')[(bowerJSONPath, packageJSONPath)].forEach(function (packagePath) {/* */});

Problem is here: