acorn.js parser error when building for web frontend via webpack

FYI, if fails building via webpack (both when piping or not piping it through babel).

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 14.04.3 LTS
Release:    14.04
Codename:   trusty

$ node -v
v6.9.1

$ npm -v webpack
3.10.8

'use strict';

import p2 from 'p2'; // eslint-disable-line no-unused-vars

class TestPhysicsP2 {
  constructor () {
    console.log('Hello to TestPhysicsP2');
  }
}

export default TestPhysicsP2;

Building via webpack throws error

ERROR in ./~/p2/package.json
Module parse failed: /path/to/the/project/node_modules/p2/package.json Unexpected token (2:9)
You may need an appropriate loader to handle this file type.
SyntaxError: Unexpected token (2:9)
    at Parser.pp$4.raise (/path/to/the/project/node_modules/webpack/node_modules/acorn/dist/acorn.js:2221:15)
    at Parser.pp.unexpected (/path/to/the/project/node_modules/webpack/node_modules/acorn/dist/acorn.js:603:10)
    at Parser.pp.semicolon (/path/to/the/project/node_modules/webpack/node_modules/acorn/dist/acorn.js:581:61)
    at Parser.pp$1.parseExpressionStatement (/path/to/the/project/node_modules/webpack/node_modules/acorn/dist/acorn.js:966:10)
    at Parser.pp$1.parseStatement (/path/to/the/project/node_modules/webpack/node_modules/acorn/dist/acorn.js:730:24)
    at Parser.pp$1.parseBlock (/path/to/the/project/node_modules/webpack/node_modules/acorn/dist/acorn.js:981:25)
    at Parser.pp$1.parseStatement (/path/to/the/project/node_modules/webpack/node_modules/acorn/dist/acorn.js:709:33)
    at Parser.pp$1.parseTopLevel (/path/to/the/project/node_modules/webpack/node_modules/acorn/dist/acorn.js:638:25)
    at Parser.parse (/path/to/the/project/node_modules/webpack/node_modules/acorn/dist/acorn.js:516:17)
    at Object.parse (/path/to/the/project/node_modules/webpack/node_modules/acorn/dist/acorn.js:3098:39)
 @ ./~/p2/src/p2.js 48:13-39

Currently as a super quick fix I just include the prebuilt

import p2 from 'p2/build/p2.js';

I don't have time to investigate further the reasons, but first thing that vas visible is that you are using node 4.2.2 (it is LTS), there were quite a lot changes to the newest LTS (v6) see plan, and I remember already fighting some acorn errors due to that some time ago.

Not breaking, but as said - FYI :)

schteppe / p2.js

acorn.js parser error when building for web frontend via webpack #269