title: Error In Runtime From Terser During Build --prod
body: <p>I have updated everything Angular and am now getting the error below (4x) when I<br>
  "Build --prod"</p>
  
  <p>No errors if I remove --prod</p>
  
  <p>I have no real code in this app. It is just a starter shell.</p>
  
  <p>Any suggestions on what to look into?</p>
  
  <pre><code>ERROR in runtime.82c6613acef8f7246fe8.js from Terser
  TypeError: Cannot read property 'minify' of undefined
      at minify (/Users/puser/Dropbox/AngularApps/GenesisFYI-v06/node_modules/terser-webpack-plugin/dist/minify.js:175:23)
      at module.exports (/Users/puser/Dropbox/AngularApps/GenesisFYI-v06/node_modules/terser-webpack-plugin/dist/worker.js:13:40)
      at handle (/Users/puser/Dropbox/AngularApps/GenesisFYI-v06/node_modules/worker-farm/lib/child/index.js:44:8)
      at process.&lt;anonymous&gt; (/Users/puser/Dropbox/AngularApps/GenesisFYI-v06/node_modules/worker-farm/lib/child/index.js:51:3)
      at process.emit (events.js:197:13)
      at emit (internal/child_process.js:828:12)
      at processTicksAndRejections (internal/process/next_tick.js:76:17)
  </code></pre>
  
  <hr>
  
  <p>My current Version</p>
  
  <pre><code>Angular CLI: 7.3.0  
  Node: 11.8.0  
  OS: darwin x64  
  Angular: 7.2.3  
  ... animations, common, compiler, compiler-cli, core, forms  
  ... http, language-service, platform-browser  
  ... platform-browser-dynamic, router, service-worker  
  
  Package                           Version  
  -----------------------------------------------------------  
  @angular-devkit/architect         0.13.0  
  @angular-devkit/build-angular     0.13.0  
  @angular-devkit/build-optimizer   0.13.0  
  @angular-devkit/build-webpack     0.13.0  
  @angular-devkit/core              0.6.8  
  @angular-devkit/schematics        0.6.8  
  @angular/cli                      7.3.0  
  @angular/pwa                      0.6.8  
  @ngtools/webpack                  7.3.0  
  @schematics/angular               0.6.8  
  @schematics/update                0.13.0  
  rxjs                              6.4.0  
  typescript                        3.2.4  
  webpack                           4.29.0  
  </code></pre>