Unable to debug the app: Webpack & ES2015 (ES6)

[vucalur]

Debugging doesn't stop at any breakpoint in transpiled sources.
Tested on Chromium (Chrome Dev Tools) and Firefox (Firebug).

.yo-rc.json:

{
  "generator-fountain-angular1": {
    "version": "0.7.2",
    "props": {
      "framework": "angular1",
      "modules": "webpack",
      "js": "babel",
      "ci": [],
      "css": "scss",
      "resolved": "/home/vucalur/npm/lib/node_modules/generator-fountain-webapp/node_modules/generator-fountain-angular1/generators/app/index.js",
      "namespace": "fountain-angular1",
      "argv": {
        "remain": [],
        "cooked": [],
        "original": []
      },
      "sample": "todoMVC",
      "router": "uirouter"
    }
  }
}

I was able to reproduce it for "framework": "angular2" as well.
Was happening on generator's 0.6.0 version too.

Even inserting debugger; statement doesn't work properly:
Unlike with inserting a breakpoint in dev tools, execution stops at debugger;.
However, it looks like source map is screwed and you don't see the actual line with the statement.

Here how it looks on todoMVC:

• debugger; statement is the 1st line of handleSave() in Header.js?eb22.
• Execution stops at some weird place in some ?d41d auxiliary file.
• Scope and the method name at the top of the Call Stack (handleSave) are ok though.

For following choices (.yo-rc.json) debugging works fine - tested myself:

• bower, Pure old JavaScript
• webpack, Pure old JavaScript
• webpack, TypeScript
• systemJS, ES2015

[vucalur]

Fix - short

Just change devtool: 'cheap-module-eval-source-map' to devtool: 'source-map' in 2 files:

• conf/webpack.conf.js
• conf/webpack-test.conf.js

Fix - long

I was already able to figure it out by myself.
Posting the solution anyway - I hope I'll save you some hours.

Here's the commit fixing this: FountainJS/generator-fountain-webpack@04809fe
The fix is just 3 days old, so you'll have to apply it manually, since it's not included in any release yet.

For an app in typescript ("js": "typescript" in .yo-rc.json) config files also contain infamous devtool: 'cheap-module-eval-source-map', however debugging works ok.
I advise applying the fix for TS anyway.