title: Angular build for production fails
body: <p>When I try to build for production my angular application with the following command <code>ng build --prod --build-optimizer</code> I get the following output:</p>
  
  <pre><code>Date: 2019-01-29T08:39:12.193Z
  Hash: 05648c76cf91b1245f68
  Time: 27920ms
  chunk {0} runtime.1eee2a92f0ed121267d0.js (runtime) 2.22 kB [entry] [rendered]
  chunk {1} 1.71c6b320e46d84e7f880.js () 88.8 kB  [rendered]
  chunk {2} main.058aa675d38205a01c2e.js (main) 1.65 MB [initial] [rendered]
  chunk {3} polyfills.6226af78bf8dfb509e3e.js (polyfills) 61.7 kB [initial] [rendered]
  chunk {4} styles.dec6a5db702d518085c9.css (styles) 61.2 kB [initial] [rendered]
  chunk {5} 5.639dab8d0d9c763ecce1.js () 639 kB  [rendered]
  chunk {6} 6.eeb0ec1b5f6ee2bc4225.js () 130 kB  [rendered]
  
  ERROR in 5.639dab8d0d9c763ecce1.js from Terser
  --&gt; Unexpected token: punc ()) [5.639dab8d0d9c763ecce1.js:4086,34] &lt;--
  npm ERR! code ELIFECYCLE
  npm ERR! errno 1
  npm ERR! second-frontend@0.0.0 build_prod: `ng build --prod --build-optimizer`
  npm ERR! Exit status 1
  npm ERR! 
  npm ERR! Failed at the second-frontend@0.0.0 build_prod script.
  npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
  </code></pre>
  
  <p>Building for development and serve the application works fine so I suspect it might be related to the uglify process. The angular json configuration for production is as follows:</p>
  
  <pre><code>"production": {
    "fileReplacements": [
      {
        "replace": "src/environments/environment.ts",
        "with": "src/environments/environment.prod.ts"
      }
    ],
    "optimization": true,
    "outputHashing": "all",
    "sourceMap": false,
    "extractCss": true,
    "namedChunks": false,
    "aot": true,
    "extractLicenses": true,
    "vendorChunk": false,
    "buildOptimizer": true
  },
  </code></pre>
  
  <p>and the angular version and packages are:</p>
  
  <pre><code>Angular CLI: 7.2.3
  Node: 11.1.0
  OS: win32 x64
  Angular: 7.2.0
  ... animations, common, compiler, compiler-cli, core, forms
  ... http, language-service, platform-browser
  ... platform-browser-dynamic, router
  
  Package                           Version
  -----------------------------------------------------------
  @angular-devkit/architect         0.12.1
  @angular-devkit/build-angular     0.12.1
  @angular-devkit/build-optimizer   0.12.1
  @angular-devkit/build-webpack     0.12.1
  @angular-devkit/core              7.2.1
  @angular-devkit/schematics        7.2.3
  @angular/cdk                      7.2.1
  @angular/cli                      7.2.3
  @angular/flex-layout              7.0.0-beta.23
  @angular/material                 7.2.1
  @ngtools/webpack                  7.2.1
  @schematics/angular               7.2.3
  @schematics/update                0.12.3
  rxjs                              6.3.3
  typescript                        3.2.2
  webpack                           4.23.1
  </code></pre>
  
  <p>finally, the tsconfig.json file has the following content:</p>
  
  <pre><code>{
    "compileOnSave": false,
    "compilerOptions": {
      "baseUrl": "./",
      "paths": {
        "@app/*": ["src/app/*"],
        "@env/*": ["src/environments/*"]
      },
      "outDir": "./dist/out-tsc",
      "sourceMap": true,
      "declaration": false,
      "moduleResolution": "node",
      "emitDecoratorMetadata": true,
      "experimentalDecorators": true,
      "target": "es5",
      "typeRoots": [
        "node_modules/@types"
      ],
      "lib": [
        "es2017",
        "dom"
      ]
    }
  }
  </code></pre>
  
  <p>If I change angular.json "SourceMap" option from false to true and try to execute the production build it builds without throwing any error:</p>
  
  <pre><code>Date: 2019-01-29T08:47:50.705Z
  Hash: 369c42b07abe57a96302
  Time: 42331ms
  chunk {0} runtime.90bf2a53d53699d5ef63.js, runtime.90bf2a53d53699d5ef63.js.map (runtime) 2.28 kB [entry] [rendered]
  chunk {1} 1.9ac663afcd9a15f9ad98.js, 1.9ac663afcd9a15f9ad98.js.map () 88.9 kB  [rendered]
  chunk {2} main.e3c4184e7cbc49903adc.js, main.e3c4184e7cbc49903adc.js.map (main) 1.65 MB [initial] [rendered]
  chunk {3} polyfills.6c3e7ecffd41b4bb0d68.js, polyfills.6c3e7ecffd41b4bb0d68.js.map (polyfills) 61.7 kB [initial] [rendered]
  chunk {4} styles.cb7c8ca5b54a30c69879.css, styles.cb7c8ca5b54a30c69879.css.map (styles) 61.2 kB [initial] [rendered]
  chunk {5} 5.72034e2cb610bc9b5476.js, 5.72034e2cb610bc9b5476.js.map () 251 kB  [rendered]
  chunk {6} 6.45111c2fd642148bbdd3.js, 6.45111c2fd642148bbdd3.js.map () 131 kB  [rendered]
  
  Process finished with exit code 0
  </code></pre>
  
  <p>Any suggestion?</p>
  
  <p><strong>EDIT:</strong><br>
  running <code>ng build --prod --optimization=false</code> compiles perfectly</p>