關於angular5的惰性加載報錯問題

之前為了測試一個模塊優化問題，於是用angular-cli快速搭建了個ng5的腳手架demo，在應用惰性加載功能的時候發現瀏覽器報錯如下：

ERROR Error: Uncaught (in promise): TypeError: __webpack_require__.e is not a function
TypeError: __webpack_require__.e is not a function
    at webpackAsyncContext (eval at ./src/$$_lazy_route_resource lazy recursive (main.bundle.js:13), :15:29)
    at SystemJsNgModuleLoader.loadAndCompile (core.js:6554)
    at SystemJsNgModuleLoader.load (core.js:6538)
    at RouterConfigLoader.loadModuleFactory (router.js:4543)
    at RouterConfigLoader.load (router.js:4523)
    at MergeMapSubscriber.eval [as project] (router.js:2015)
    at MergeMapSubscriber._tryNext (mergeMap.js:128)
    at MergeMapSubscriber._next (mergeMap.js:118)
    at MergeMapSubscriber.Subscriber.next (Subscriber.js:92)
    at ScalarObservable._subscribe (ScalarObservable.js:51)
    at webpackAsyncContext (eval at ./src/$$_lazy_route_resource lazy recursive (main.bundle.js:13), :15:29)
    at SystemJsNgModuleLoader.loadAndCompile (core.js:6554)
    at SystemJsNgModuleLoader.load (core.js:6538)
    at RouterConfigLoader.loadModuleFactory (router.js:4543)
    at RouterConfigLoader.load (router.js:4523)
    at MergeMapSubscriber.eval [as project] (router.js:2015)
    at MergeMapSubscriber._tryNext (mergeMap.js:128)
    at MergeMapSubscriber._next (mergeMap.js:118)
    at MergeMapSubscriber.Subscriber.next (Subscriber.js:92)
    at ScalarObservable._subscribe (ScalarObservable.js:51)
    at resolvePromise (zone.js:809)
    at resolvePromise (zone.js:775)
    at eval (zone.js:858)
    at ZoneDelegate.invokeTask (zone.js:421)
    at Object.onInvokeTask (core.js:4736)
    at ZoneDelegate.invokeTask (zone.js:420)
    at Zone.runTask (zone.js:188)
    at drainMicroTaskQueue (zone.js:595)
    at ZoneTask.invokeTask [as invoke] (zone.js:500)
    at invokeTask (zone.js:1517)

於是再次確認了幾遍特性模塊的配置，發現沒問題，於是就開始發動搜商尋找bug源，這里不得不吐槽下國內的技術社區原創性太少，往往一個問題搜索下，搜索引擎前幾頁都是同一個人解答的復制黏貼版，國內搜索無果，不得不翻出去找找，最終在stackoverflow上發現了一個方案，及降低angular/cli一個小版本，如下：

npm remove -g @angular/cli
npm install -g @angular/cli@1.7.2
npm remove @angular/cli
npm add @angular/cli@1.7.2 --save-dev

操作后是ok的，但是后面的問題就不得解了，我在此將版本升級到@angular/cli@1.7.3（全局和本地）后，再運行后發現之前的問題不再出現了（在此希望有哪位兄弟幫忙解釋下）！！！！！