angular-cli: @ngtools/webpack above 1.8.0 is not working because of removing the decorators

Versions

Not using ng, just using @ngtools/webpack with webpack.

Repro steps

tsconfig.aot.json

{
  "compilerOptions": {
    "skipLibCheck": true,
    "outDir": "build/aot",
    "target": "es5",
    "module": "commonjs",
    "moduleResolution": "node",
    "sourceMap": false,
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "noImplicitAny": true,
    "suppressImplicitAnyIndexErrors": true,
    "lib": [
      "es5",
      "es6",
      "dom",
      "es2015.collection",
      "es2015.promise",
      "es2015.core",
      "es2016",
      "es2017"
    ]
  },
  "includes": [
    "src/angular/**/*",
    "test/angular-webpack/**/*"
  ],
  "exclude": [
    "node_modules",
    "src/angular/boot.ts",
    "test/angular-webpack/angular/boot.ts",
    "build/browser"
  ],
  "angularCompilerOptions": {
    "annotationsAs": "decorators",
    "preserveWhitespaces": false
  }
}

Observed behavior

ERROR in Error: TypeError: Cannot read property 'getTsProgram' of undefined
  at AngularCompilerPlugin._getTsProgram (/home/patrikx3/Projects/patrikx3/corifeus/corifeus-web/node_modules/@ngtools/webpack/src/angular_compiler_plugin.js:186:62)
  at getTypeChecker (/home/patrikx3/Projects/patrikx3/corifeus/corifeus-web/node_modules/@ngtools/webpack/src/angular_compiler_plugin.js:487:43)
  at ast_helpers_1.collectDeepNodes.filter (/home/patrikx3/Projects/patrikx3/corifeus/corifeus-web/node_modules/@ngtools/webpack/src/transformers/remove_decorators.js:14:60)
  at Array.filter (<anonymous>:null:null)
  at standardTransform (/home/patrikx3/Projects/patrikx3/corifeus/corifeus-web/node_modules/@ngtools/webpack/src/transformers/remove_decorators.js:14:14)
  at transformer (/home/patrikx3/Projects/patrikx3/corifeus/corifeus-web/node_modules/@ngtools/webpack/src/transformers/make_transform.js:14:25)
  at /home/patrikx3/Projects/patrikx3/corifeus/corifeus-web/node_modules/typescript/lib/typescript.js:2492:86
  at reduceLeft (/home/patrikx3/Projects/patrikx3/corifeus/corifeus-web/node_modules/typescript/lib/typescript.js:2188:30)
  at /home/patrikx3/Projects/patrikx3/corifeus/corifeus-web/node_modules/typescript/lib/typescript.js:2492:42
  at transformRoot (/home/patrikx3/Projects/patrikx3/corifeus/corifeus-web/node_modules/typescript/lib/typescript.js:63602:82)
  at Object.map (/home/patrikx3/Projects/patrikx3/corifeus/corifeus-web/node_modules/typescript/lib/typescript.js:1696:29)
  at Object.transformNodes (/home/patrikx3/Projects/patrikx3/corifeus/corifeus-web/node_modules/typescript/lib/typescript.js:63590:30)
  at Object.emitFiles (/home/patrikx3/Projects/patrikx3/corifeus/corifeus-web/node_modules/typescript/lib/typescript.js:66273:28)
  at emitWorker (/home/patrikx3/Projects/patrikx3/corifeus/corifeus-web/node_modules/typescript/lib/typescript.js:69725:33)
  at /home/patrikx3/Projects/patrikx3/corifeus/corifeus-web/node_modules/typescript/lib/typescript.js:69687:66
  at runWithCancellationToken (/home/patrikx3/Projects/patrikx3/corifeus/corifeus-web/node_modules/typescript/lib/typescript.js:69779:24)
  at Object.emit (/home/patrikx3/Projects/patrikx3/corifeus/corifeus-web/node_modules/typescript/lib/typescript.js:69687:20)
  at defaultEmitCallback (/home/patrikx3/Projects/patrikx3/corifeus/corifeus-web/node_modules/@angular/compiler-cli/src/transformers/program.js:33:20)
  at AngularCompilerProgram.emit (/home/patrikx3/Projects/patrikx3/corifeus/corifeus-web/node_modules/@angular/compiler-cli/src/transformers/program.js:242:30)
  at AngularCompilerPlugin._emit (/home/patrikx3/Projects/patrikx3/corifeus/corifeus-web/node_modules/@ngtools/webpack/src/angular_compiler_plugin.js:717:49)
  at Promise.resolve.then.then.then (/home/patrikx3/Projects/patrikx3/corifeus/corifeus-web/node_modules/@ngtools/webpack/src/angular_compiler_plugin.js:553:54)
  at <anonymous>:null:null
  at process._tickCallback (internal/process/next_tick.js:188:7)

Desired behavior

With Angular 5.0.1 it was working.

Mention any other details that might be useful (optional)

Is @ngtools/webpack behind with Angular 5.0.2 ?