Webpack suddenly broke

Question

A week ago it was working fine. Now, without any changes (same PC and exactly same files - no diff against repo), after npm install it is no longer working and crashing with following error:

user@machine:~/workspace/work/project$ npm run build

> [email protected] build /some_outer_path/some_path/workspace/work/project
> rimraf dist && webpack --progress --profile --bail

 10% building modules 3/12 modules 9 active ...h-fe/node_modules/quill/dist/quill.jsModuleNotFoundError: Module not found: Error: Can't resolve 'css' in '/some_outer_path/some_path/workspace/work/project'
    at /some_outer_path/some_path/workspace/work/project/node_modules/webpack/lib/Compilation.js:232:38
    at onDoneResolving (/some_outer_path/some_path/workspace/work/project/node_modules/webpack/lib/NormalModuleFactory.js:40:20)
    at /some_outer_path/some_path/workspace/work/project/node_modules/webpack/lib/NormalModuleFactory.js:159:21
    at /some_outer_path/some_path/workspace/work/project/node_modules/webpack/node_modules/async/dist/async.js:3853:9
    at /some_outer_path/some_path/workspace/work/project/node_modules/webpack/node_modules/async/dist/async.js:484:16
    at iteratorCallback (/some_outer_path/some_path/workspace/work/project/node_modules/webpack/node_modules/async/dist/async.js:1082:13)
    at /some_outer_path/some_path/workspace/work/project/node_modules/webpack/node_modules/async/dist/async.js:988:16
    at /some_outer_path/some_path/workspace/work/project/node_modules/webpack/node_modules/async/dist/async.js:3850:13
    at apply (/some_outer_path/some_path/workspace/work/project/node_modules/webpack/node_modules/async/dist/async.js:41:25)
    at /some_outer_path/some_path/workspace/work/project/node_modules/webpack/node_modules/async/dist/async.js:76:12
    at /some_outer_path/some_path/workspace/work/project/node_modules/webpack/node_modules/async/dist/async.js:484:16
    at /some_outer_path/some_path/workspace/work/project/node_modules/webpack/node_modules/async/dist/async.js:1161:9
    at /some_outer_path/some_path/workspace/work/project/node_modules/webpack/node_modules/async/dist/async.js:484:16
    at iteratorCallback (/some_outer_path/some_path/workspace/work/project/node_modules/webpack/node_modules/async/dist/async.js:1082:13)
    at /some_outer_path/some_path/workspace/work/project/node_modules/webpack/node_modules/async/dist/async.js:988:16
    at /some_outer_path/some_path/workspace/work/project/node_modules/webpack/node_modules/async/dist/async.js:1158:13
    at /some_outer_path/some_path/workspace/work/project/node_modules/webpack/lib/NormalModuleFactory.js:216:19
    at onResolved (/some_outer_path/some_path/workspace/work/project/node_modules/enhanced-resolve/lib/Resolver.js:70:11)
    at loggingCallbackWrapper (/some_outer_path/some_path/workspace/work/project/node_modules/enhanced-resolve/lib/createInnerCallback.js:31:19)
    at afterInnerCallback (/some_outer_path/some_path/workspace/work/project/node_modules/enhanced-resolve/lib/Resolver.js:138:10)
    at loggingCallbackWrapper (/some_outer_path/some_path/workspace/work/project/node_modules/enhanced-resolve/lib/createInnerCallback.js:31:19)
    at Resolver.applyPluginsAsyncSeriesBailResult1 (/some_outer_path/some_path/workspace/work/project/node_modules/tapable/lib/Tapable.js:108:46)
    at innerCallback (/some_outer_path/some_path/workspace/work/project/node_modules/enhanced-resolve/lib/Resolver.js:125:19)
    at loggingCallbackWrapper (/some_outer_path/some_path/workspace/work/project/node_modules/enhanced-resolve/lib/createInnerCallback.js:31:19)
    at /some_outer_path/some_path/workspace/work/project/node_modules/tapable/lib/Tapable.js:210:15
    at /some_outer_path/some_path/workspace/work/project/node_modules/enhanced-resolve/lib/UnsafeCachePlugin.js:39:4
    at loggingCallbackWrapper (/some_outer_path/some_path/workspace/work/project/node_modules/enhanced-resolve/lib/createInnerCallback.js:31:19)
    at afterInnerCallback (/some_outer_path/some_path/workspace/work/project/node_modules/enhanced-resolve/lib/Resolver.js:138:10)
    at loggingCallbackWrapper (/some_outer_path/some_path/workspace/work/project/node_modules/enhanced-resolve/lib/createInnerCallback.js:31:19)
    at Resolver.applyPluginsAsyncSeriesBailResult1 (/some_outer_path/some_path/workspace/work/project/node_modules/tapable/lib/Tapable.js:108:46)
resolve 'css' in '/some_outer_path/some_path/workspace/work/project'
  Parsed request is a module
  using description file: /some_outer_path/some_path/workspace/work/project/package.json (relative path: .)
  after using description file: /some_outer_path/some_path/workspace/work/project/package.json (relative path: .)
    resolve as module
      /some_outer_path/some_path/workspace/work/node_modules doesn't exist or is not a directory
      /some_outer_path/some_path/workspace/node_modules doesn't exist or is not a directory
      /some_outer_path/some_path/node_modules doesn't exist or is not a directory
      /some_outer_path/node_modules doesn't exist or is not a directory
      /mnt/node_modules doesn't exist or is not a directory
      /node_modules doesn't exist or is not a directory
      looking for modules in /some_outer_path/some_path/workspace/work/project/node_modules
        using description file: /some_outer_path/some_path/workspace/work/project/package.json (relative path: ./node_modules)
        after using description file: /some_outer_path/some_path/workspace/work/project/package.json (relative path: ./node_modules)
          using description file: /some_outer_path/some_path/workspace/work/project/package.json (relative path: ./node_modules/css)
            as directory
              /some_outer_path/some_path/workspace/work/project/node_modules/css doesn't exist
            no extension
              /some_outer_path/some_path/workspace/work/project/node_modules/css doesn't exist
            .js
              /some_outer_path/some_path/workspace/work/project/node_modules/css.js doesn't exist
            .json
              /some_outer_path/some_path/workspace/work/project/node_modules/css.json doesn't exist

/some_outer_path/some_path/workspace/work/project/node_modules/webpack/lib/Compilation.js:197
                        _this.errors.push(err);
        ^
TypeError: Cannot read property 'errors' of null
    at errorAndCallback (/some_outer_path/some_path/workspace/work/project/node_modules/webpack/lib/Compilation.js:197:9)
    at errorOrWarningAndCallback (/some_outer_path/some_path/workspace/work/project/node_modules/webpack/lib/Compilation.js:228:13)
    at /some_outer_path/some_path/workspace/work/project/node_modules/webpack/lib/Compilation.js:232:12
    at onDoneResolving (/some_outer_path/some_path/workspace/work/project/node_modules/webpack/lib/NormalModuleFactory.js:40:20)
    at /some_outer_path/some_path/workspace/work/project/node_modules/webpack/lib/NormalModuleFactory.js:159:21
    at /some_outer_path/some_path/workspace/work/project/node_modules/webpack/node_modules/async/dist/async.js:3853:9
    at /some_outer_path/some_path/workspace/work/project/node_modules/webpack/node_modules/async/dist/async.js:484:16
    at iteratorCallback (/some_outer_path/some_path/workspace/work/project/node_modules/webpack/node_modules/async/dist/async.js:1082:13)
    at /some_outer_path/some_path/workspace/work/project/node_modules/webpack/node_modules/async/dist/async.js:988:16
    at /some_outer_path/some_path/workspace/work/project/node_modules/webpack/node_modules/async/dist/async.js:3850:13
    at apply (/some_outer_path/some_path/workspace/work/project/node_modules/webpack/node_modules/async/dist/async.js:41:25)
    at /some_outer_path/some_path/workspace/work/project/node_modules/webpack/node_modules/async/dist/async.js:76:12
    at /some_outer_path/some_path/workspace/work/project/node_modules/webpack/node_modules/async/dist/async.js:484:16
    at /some_outer_path/some_path/workspace/work/project/node_modules/webpack/node_modules/async/dist/async.js:1161:9
    at /some_outer_path/some_path/workspace/work/project/node_modules/webpack/node_modules/async/dist/async.js:484:16
    at iteratorCallback (/some_outer_path/some_path/workspace/work/project/node_modules/webpack/node_modules/async/dist/async.js:1082:13)
    at /some_outer_path/some_path/workspace/work/project/node_modules/webpack/node_modules/async/dist/async.js:988:16
    at /some_outer_path/some_path/workspace/work/project/node_modules/webpack/node_modules/async/dist/async.js:1158:13
    at /some_outer_path/some_path/workspace/work/project/node_modules/webpack/lib/NormalModuleFactory.js:216:19
    at onResolved (/some_outer_path/some_path/workspace/work/project/node_modules/enhanced-resolve/lib/Resolver.js:70:11)
    at loggingCallbackWrapper (/some_outer_path/some_path/workspace/work/project/node_modules/enhanced-resolve/lib/createInnerCallback.js:31:19)
    at afterInnerCallback (/some_outer_path/some_path/workspace/work/project/node_modules/enhanced-resolve/lib/Resolver.js:138:10)
    at loggingCallbackWrapper (/some_outer_path/some_path/workspace/work/project/node_modules/enhanced-resolve/lib/createInnerCallback.js:31:19)
    at Resolver.applyPluginsAsyncSeriesBailResult1 (/some_outer_path/some_path/workspace/work/project/node_modules/tapable/lib/Tapable.js:108:46)
    at innerCallback (/some_outer_path/some_path/workspace/work/project/node_modules/enhanced-resolve/lib/Resolver.js:125:19)
    at loggingCallbackWrapper (/some_outer_path/some_path/workspace/work/project/node_modules/enhanced-resolve/lib/createInnerCallback.js:31:19)
    at /some_outer_path/some_path/workspace/work/project/node_modules/tapable/lib/Tapable.js:210:15
    at /some_outer_path/some_path/workspace/work/project/node_modules/enhanced-resolve/lib/UnsafeCachePlugin.js:39:4
    at loggingCallbackWrapper (/some_outer_path/some_path/workspace/work/project/node_modules/enhanced-resolve/lib/createInnerCallback.js:31:19)
    at afterInnerCallback (/some_outer_path/some_path/workspace/work/project/node_modules/enhanced-resolve/lib/Resolver.js:138:10)

npm ERR! Linux 4.4.0-45-generic
npm ERR! argv "/usr/local/bin/node" "/usr/local/bin/npm" "run" "build"
npm ERR! node v6.8.1
npm ERR! npm  v3.10.8
npm ERR! code ELIFECYCLE
npm ERR! [email protected] build: `rimraf dist && webpack --progress --profile --bail`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the [email protected] build script 'rimraf dist && webpack --progress --profile --bail'.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the project package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     rimraf dist && webpack --progress --profile --bail
npm ERR! You can get information on how to open an issue for this project with:
npm ERR!     npm bugs project
npm ERR! Or if that isn't available, you can get their info via:
npm ERR!     npm owner ls project
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR!     /some_outer_path/some_path/workspace/work/project/npm-debug.log

webpack.config.js (mostly from this seed - https://github.com/preboot/angular2-webpack/):

// Helper: root() is defined at the bottom
var path = require('path');
var webpack = require('webpack');

// Webpack Plugins
var CommonsChunkPlugin = webpack.optimize.CommonsChunkPlugin;
var autoprefixer = require('autoprefixer');
var HtmlWebpackPlugin = require('html-webpack-plugin');
var ExtractTextPlugin = require('extract-text-webpack-plugin');
var CopyWebpackPlugin = require('copy-webpack-plugin');
var DashboardPlugin = require('webpack-dashboard/plugin');
var ForkCheckerPlugin = require('awesome-typescript-loader').ForkCheckerPlugin;

/**
 * Env
 * Get npm lifecycle event to identify the environment
 */
var ENV = process.env.npm_lifecycle_event;
var isTestWatch = ENV === 'test-watch';
var isTest = ENV === 'test' || isTestWatch;
var isProd = ENV === 'build';

module.exports = function makeWebpackConfig() {
  /**
   * Config
   * Reference: http://webpack.github.io/docs/configuration.html
   * This is the object where all configuration gets set
   */
  var config = {};

  /**
   * Devtool
   * Reference: http://webpack.github.io/docs/configuration.html#devtool
   * Type of sourcemap to use per build type
   */
  if (isProd) {
    config.devtool = 'source-map';
  }
  else if (isTest) {
    config.devtool = 'inline-source-map';
  }
  else {
    config.devtool = 'eval-source-map';
  }

  /**
   * Entry
   * Reference: http://webpack.github.io/docs/configuration.html#entry
   */
  config.entry = isTest ? {} : {
    'polyfills': './src/polyfills.ts',
    'vendor': './src/vendor.ts',
    'app': './src/main.ts' // our angular app
  };

  /**
   * Output
   * Reference: http://webpack.github.io/docs/configuration.html#output
   */
  config.output = isTest ? {} : {
    path: root('dist'),
    publicPath: isProd ? '/' : 'http://localhost:8080/',
    filename: isProd ? 'js/[name].[hash].js' : 'js/[name].js',
    chunkFilename: isProd ? '[id].[hash].chunk.js' : '[id].chunk.js'
  };

  /**
   * Resolve
   * Reference: http://webpack.github.io/docs/configuration.html#resolve
   */
  config.resolve = {
    // only discover files that have those extensions
    extensions: ['.ts', '.js', '.json', '.css', '.scss', '.html'],
  };

  var atlOptions = '';
  if (isTest && !isTestWatch) {
    // awesome-typescript-loader needs to output inlineSourceMap for code coverage to work with source maps.
    atlOptions = 'inlineSourceMap=true&sourceMap=false';
  }

  /**
   * Loaders
   * Reference: http://webpack.github.io/docs/configuration.html#module-loaders
   * List: http://webpack.github.io/docs/list-of-loaders.html
   * This handles most of the magic responsible for converting modules
   */
  config.module = {
    rules: [
      // Support for .ts files.
      {
        test: /\.ts$/,
        loaders: ['awesome-typescript-loader?' + atlOptions, 'angular2-template-loader', '@angularclass/hmr-loader'],
        exclude: [isTest ? /\.(e2e)\.ts$/ : /\.(spec|e2e)\.ts$/, /node_modules\/(?!(ng2-.+))/]
      },

      // copy those assets to output
      {
        test: /\.(png|jpe?g|gif|svg|woff|woff2|ttf|eot|ico)(\?v=[0-9]\.[0-9]\.[0-9])?$/,
        loader: 'file?name=fonts/[name].[hash].[ext]?'
      },

      // Support for *.json files.
      {test: /\.json$/, loader: 'json'},

      // Support for CSS as raw text
      // use 'null' loader in test mode (https://github.com/webpack/null-loader)
      // all css in src/style will be bundled in an external css file
      {
        test: /\.css$/,
        exclude: root('src', 'app'),
        loader: isTest ? 'null' : ExtractTextPlugin.extract({
          fallbackLoader: 'style-loader',
          loader: ['css', 'postcss']
        })
      },
      // all css required in src/app files will be merged in js files
      {test: /\.css$/, include: root('src', 'app'), loader: 'raw!postcss'},

      // support for .scss files
      // use 'null' loader in test mode (https://github.com/webpack/null-loader)
      // all css in src/style will be bundled in an external css file
      {
        test: /\.(scss|sass)$/,
        exclude: root('src', 'app'),
        loader: isTest ? 'null' : ExtractTextPlugin.extract({
          fallbackLoader: 'style-loader',
          loader: ['css', 'postcss', 'sass']
        })
      },
      // all css required in src/app files will be merged in js files
      {test: /\.(scss|sass)$/, exclude: root('src', 'style'), loader: 'raw!postcss!sass'},

      // support for .html as raw text
      // todo: change the loader to something that adds a hash to images
      {test: /\.html$/, loader: 'raw', exclude: root('src', 'public')}
    ]
  };

  if (isTest && !isTestWatch) {
    // instrument only testing sources with Istanbul, covers ts files
    config.module.rules.push({
      test: /\.ts$/,
      enforce: 'post',
      include: path.resolve('src'),
      loader: 'istanbul-instrumenter-loader',
      exclude: [/\.spec\.ts$/, /\.e2e\.ts$/, /node_modules/]
    });
  }

  // if (!isTest || !isTestWatch) {
  //   // tslint support
  //   config.module.rules.push({
  //     test: /\.ts$/,
  //     enforce: 'pre',
  //     loader: 'tslint'
  //   });
  // }

  /**
   * Plugins
   * Reference: http://webpack.github.io/docs/configuration.html#plugins
   * List: http://webpack.github.io/docs/list-of-plugins.html
   */
  config.plugins = [
    // Define env variables to help with builds
    // Reference: https://webpack.github.io/docs/list-of-plugins.html#defineplugin
    new webpack.DefinePlugin({
      // Environment helpers
      'process.env': {
        ENV: JSON.stringify(ENV)
      }
    }),

    // Workaround needed for angular 2 angular/angular#11580
    new webpack.ContextReplacementPlugin(
      // The (\\|\/) piece accounts for path separators in *nix and Windows
      /angular(\\|\/)core(\\|\/)(esm(\\|\/)src|src)(\\|\/)linker/,
      root('./src') // location of your src
    ),

    // Tslint configuration for webpack 2
    new webpack.LoaderOptionsPlugin({
      options: {
        /**
         * Apply the tslint loader as pre/postLoader
         * Reference: https://github.com/wbuchwalter/tslint-loader
         */
        tslint: {
          emitErrors: false,
          failOnHint: false
        },
        /**
         * Sass
         * Reference: https://github.com/jtangelder/sass-loader
         * Transforms .scss files to .css
         */
        sassLoader: {
          //includePaths: [path.resolve(__dirname, "node_modules/foundation-sites/scss")]
        },
        /**
         * PostCSS
         * Reference: https://github.com/postcss/autoprefixer-core
         * Add vendor prefixes to your css
         */
        postcss: [
          autoprefixer({
            browsers: ['last 2 version']
          })
        ]
      }
    })

    // new webpack.ProvidePlugin({Quill: 'Quill'})
  ];

  if (!isTest && !isProd) {
    config.plugins.push(new DashboardPlugin());
  }

  if (!isTest && !isTestWatch) {
    config.plugins.push(
      new ForkCheckerPlugin(),

      // Generate common chunks if necessary
      // Reference: https://webpack.github.io/docs/code-splitting.html
      // Reference: https://webpack.github.io/docs/list-of-plugins.html#commonschunkplugin
      new CommonsChunkPlugin({
        name: ['vendor', 'polyfills']
      }),

      // Inject script and link tags into html files
      // Reference: https://github.com/ampedandwired/html-webpack-plugin
      new HtmlWebpackPlugin({
        template: './src/public/index.html',
        chunksSortMode: 'dependency'
      }),

      // Extract css files
      // Reference: https://github.com/webpack/extract-text-webpack-plugin
      // Disabled when in test mode or not in build mode
      new ExtractTextPlugin({filename: 'css/[name].[hash].css', disable: !isProd})
    );
  }

  // Add build specific plugins
  if (isProd) {
    config.plugins.push(
      // Reference: http://webpack.github.io/docs/list-of-plugins.html#noerrorsplugin
      // Only emit files when there are no errors
      new webpack.NoErrorsPlugin(),

      // // Reference: http://webpack.github.io/docs/list-of-plugins.html#dedupeplugin
      // // Dedupe modules in the output
      // new webpack.optimize.DedupePlugin(),

      // Reference: http://webpack.github.io/docs/list-of-plugins.html#uglifyjsplugin
      // Minify all javascript, switch loaders to minimizing mode
      new webpack.optimize.UglifyJsPlugin({sourceMap: true, mangle: {keep_fnames: true}}),

      // Copy assets from the public folder
      // Reference: https://github.com/kevlened/copy-webpack-plugin
      new CopyWebpackPlugin([{
        from: root('src/public')
      }])
    );
  }

  /**
   * Dev server configuration
   * Reference: http://webpack.github.io/docs/configuration.html#devserver
   * Reference: http://webpack.github.io/docs/webpack-dev-server.html
   */
  config.devServer = {
    contentBase: './src/public',
    historyApiFallback: true,
    quiet: true,
    stats: 'minimal' // none (or false), errors-only, minimal, normal (or true) and verbose
  };

  return config;
}();

// Helper functions
function root(args) {
  args = Array.prototype.slice.call(arguments, 0);
  return path.join.apply(path, [__dirname].concat(args));
}

Any idea what could broke and why? How to fix it?

Edit1: webpack version is 2.1.0-beta.25 2.1.0-beta.26 (Edit3)

Edit2: The seed is not working as well (just to be crystal clear - it was working fine a week ago too). It is crashing with this error:

ERROR in ./src/polyfills.ts
Module build failed: TypeError: Can't add property fileName, object is not extensible
    at Object.Linter (/some_outer_path/some_path/workspace/work/angular2-webpack-official/node_modules/tslint/lib/tslint.js:12:23)

ERROR in ./src/vendor.ts
Module build failed: TypeError: Can't add property fileName, object is not extensible
    at Object.Linter (/some_outer_path/some_path/workspace/work/angular2-webpack-official/node_modules/tslint/lib/tslint.js:12:23)

ERROR in ./src/main.ts
Module build failed: TypeError: Can't add property fileName, object is not extensible
    at Object.Linter (/some_outer_path/some_path/workspace/work/angular2-webpack-official/node_modules/tslint/lib/tslint.js:12:23)

It is a same error I get if I allow ts-lint in my project. But I think ts-lint is just crashing on wrong input (something else in a chain broke it earlier).

I am pretty sure I did not change node or npm. I really don't have a clue. Here are project dependencies:

  "dependencies": {
    "@angular/common": "2.1.0",
    "@angular/compiler": "2.1.0",
    "@angular/core": "2.1.0",
    "@angular/forms": "2.1.0",
    "@angular/http": "2.1.0",
    "@angular/platform-browser": "2.1.0",
    "@angular/platform-browser-dynamic": "2.1.0",
    "@angular/router": "3.1.0",
    "@ngrx/core": "^1.2.0",
    "@ngrx/effects": "^2.0.0",
    "@ngrx/router-store": "^1.2.5",
    "@ngrx/store": "^2.2.1",
    "@ngrx/store-devtools": "^3.2.1",
    "angular2-google-maps": "^0.15.0",
    "angular2-recaptcha": "^0.3.2",
    "core-js": "^2.4.1",
    "lodash": "^4.16.4",
    "ng2-translate": "^3.1.3",
    "primeng": "^1.0.0-rc.3",
    "quill": "^1.1.3",
    "ramda": "^0.22.1",
    "reflect-metadata": "^0.1.3",
    "rxjs": "5.0.0-beta.12",
    "tsmonad": "^0.6.1",
    "zone.js": "^0.6.21"
  },
  "devDependencies": {
    "@angularclass/hmr": "^1.0.1",
    "@angularclass/hmr-loader": "^3.0.2",
    "@types/core-js": "^0.9.0",
    "@types/jasmine": "^2.2.29",
    "@types/node": "^6.0.38",
    "@types/protractor": "^1.5.16",
    "@types/selenium-webdriver": "2.44.26",
    "angular2-template-loader": "^0.4.0",
    "autoprefixer": "^6.3.2",
    "awesome-typescript-loader": "^2.2.4",
    "codelyzer": "0.0.26",
    "copy-webpack-plugin": "^3.0.0",
    "css-loader": "^0.25.0",
    "extract-text-webpack-plugin": "^2.0.0-beta.4",
    "file-loader": "^0.9.0",
    "html-loader": "^0.4.0",
    "html-webpack-plugin": "^2.8.1",
    "istanbul-instrumenter-loader": "^0.2.0",
    "jasmine-core": "^2.3.4",
    "jasmine-spec-reporter": "^2.4.0",
    "json-loader": "^0.5.3",
    "karma": "1.3.0",
    "karma-chrome-launcher": "^2.0.0",
    "karma-coverage": "^1.0.0",
    "karma-jasmine": "^1.0.2",
    "karma-mocha-reporter": "^2.0.3",
    "karma-phantomjs-launcher": "^1.0.0",
    "karma-remap-istanbul": "0.2.1",
    "karma-sourcemap-loader": "^0.3.7",
    "karma-webpack": "1.8.0",
    "node-sass": "^3.4.2",
    "null-loader": "0.1.1",
    "phantomjs-prebuilt": "^2.1.4",
    "postcss-loader": "^0.13.0",
    "protractor": "^3.1.1",
    "raw-loader": "0.5.1",
    "remap-istanbul": "^0.6.4",
    "rimraf": "^2.5.1",
    "sass-loader": "^4.0.0",
    "shelljs": "^0.7.0",
    "style-loader": "^0.13.0",
    "ts-helpers": "^1.1.1",
    "tslint": "^3.4.0",
    "tslint-loader": "^2.1.0",
    "typedoc": "^0.4.4",
    "typescript": "2.0.3",
    "url-loader": "^0.5.6",
    "webpack": "^2.1.0-beta.25",
    "webpack-dashboard": "^0.1.8",
    "webpack-dev-server": "2.1.0-beta.9"
  }

Answer 1

Are you sure you're not running beta26? If you ran npm install in the last 8 hours you could have got the new release with breaking changes how loaders are resolved

Run
./node_modules/.bin/webpack -v

With beta26 or higher you need to append "-loader" to every loader name or add "-loader" the resolveLoader.moduleExtions

In youre case i would change file to file-loader loader: 'file-loader?name=fonts/[name].[hash].[ext]?

You can also opt-in the old way by specifying moduleExtensions explicitly on the resolveLoader object

resolveLoader: {
    moduleExtensions: ['-loader']
}

I just had this similar problem myself

Webpack v2.1.0-beta.26 release notes

Breaking Changes:

-loader is no longer automatically added when resolving loaders

This was removed because it often lead to problems.

You can still opt-in to the old behavior with the resolveLoader.moduleExtensions configuration option.