feat: reproduced the error ... Yeah! :-)

Author: dherges

package.json

@@ -27,7 +27,7 @@
     "zone.js": "0.8.14"
   },
   "devDependencies": {
-    "@angular/cli": "1.3.0-rc.1",
+    "@angular/cli": "1.3.0-rc.2",
     "@angular/compiler-cli": "4.2.6",
     "@angular/language-service": "4.2.6",
     "@types/jasmine": "2.5.38",

src/app/app.component.ts

@@ -1,6 +1,6 @@
 import { Component, OnInit } from '@angular/core';
-import { Observable } from 'rxjs/Observable';
-import 'rxjs/add/observable/of';
+import { Observable } from 'rxjs/Rx';
+import 'rxjs/add/observable/of'
 
 @Component({
   selector: 'app-root',

yarn.lock

@@ -17,13 +17,13 @@
   dependencies:
     tslib "^1.7.1"
 
-"@angular/[email protected].1":
-  version "1.3.0-rc.1"
-  resolved "https://registry.yarnpkg.com/@angular/cli/-/cli-1.3.0-rc.1.tgz#b4b94d99e154a6cc8fe90e85de537b81529c9fd7"
+"@angular/[email protected].2":
+  version "1.3.0-rc.2"
+  resolved "https://registry.yarnpkg.com/@angular/cli/-/cli-1.3.0-rc.2.tgz#9caa80549f386f14cab65fc6ac18d50101ee1553"
   dependencies:
     "@angular-devkit/build-optimizer" "0.0.3"
     "@ngtools/json-schema" "1.1.0"
-    "@ngtools/webpack" "1.6.0-rc.1"
+    "@ngtools/webpack" "1.6.0-rc.2"
     autoprefixer "^6.5.3"
     chalk "^2.0.1"
     circular-dependency-plugin "^3.0.0"
@@ -48,7 +48,6 @@
     inquirer "^3.0.0"
     isbinaryfile "^3.0.0"
     istanbul-instrumenter-loader "^2.0.0"
-    json-loader "^0.5.4"
     karma-source-map-support "^1.2.0"
     less "^2.7.2"
     less-loader "^4.0.5"
@@ -78,7 +77,7 @@
     typescript ">=2.0.0 <2.5.0"
     url-loader "^0.5.7"
     walk-sync "^0.3.1"
-    webpack "~3.3.0"
+    webpack "3.3.0"
     webpack-dev-middleware "^1.11.0"
     webpack-dev-server "~2.5.1"
     webpack-merge "^4.1.0"
@@ -156,9 +155,9 @@
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/@ngtools/json-schema/-/json-schema-1.1.0.tgz#c3a0c544d62392acc2813a42c8a0dc6f58f86922"
 
-"@ngtools/[email protected].1":
-  version "1.6.0-rc.1"
-  resolved "https://registry.yarnpkg.com/@ngtools/webpack/-/webpack-1.6.0-rc.1.tgz#70cd8b08da5782322eb10f9e922cd3c59b18dfde"
+"@ngtools/[email protected].2":
+  version "1.6.0-rc.2"
+  resolved "https://registry.yarnpkg.com/@ngtools/webpack/-/webpack-1.6.0-rc.2.tgz#e74e2fc09e53337e1c2693ba0d22ad2023314d31"
   dependencies:
     enhanced-resolve "3.3.0"
     loader-utils "^1.0.2"
@@ -5559,7 +5558,7 @@ webpack-sources@^1.0.1:
     source-list-map "^2.0.0"
     source-map "~0.5.3"
 
-webpack@~3.3.0:
+[email protected]:
   version "3.3.0"
   resolved "https://registry.yarnpkg.com/webpack/-/webpack-3.3.0.tgz#ce2f9e076566aba91f74887133a883fd7da187bc"
   dependencies: