Angular 7-Prod内置编译错误-ERROR in：错误：内部错误：未知标识符未定义

Question

我一直在尝试使用npm命令ng build --configuration = prod在prod模式下构建angular 7应用并生成错误。使用ng build运行时，一切都很好。

我没有看到关于我们编写的组件\服务的任何具体信息。这是错误消息的副本。有没有办法获得真实的信息，或者是否有任何明显的我想念的东西。

ERROR in : Error: Internal error: unknown identifier undefined
    at Object.importExpr$$1 [as importExpr] (C:\ui\TestOptimization.UI\client\node_modules\@angular\compiler\bundles\compiler.umd.js:24170:27)
    at tokenExpr (C:\ui\TestOptimization.UI\client\node_modules\@angular\compiler\bundles\compiler.umd.js:19863:43)
    at providerDef (C:\ui\TestOptimization.UI\client\node_modules\@angular\compiler\bundles\compiler.umd.js:19789:24)
    at C:\ui\TestOptimization.UI\client\node_modules\@angular\compiler\bundles\compiler.umd.js:19959:81
    at Array.map (<anonymous>)
    at NgModuleCompiler.compile (C:\ui\TestOptimization.UI\client\node_modules\@angular\compiler\bundles\compiler.umd.js:19959:48)
    at AotCompiler._compileModule (C:\ui\TestOptimization.UI\client\node_modules\@angular\compiler\bundles\compiler.umd.js:24115:36)
    at C:\ui\TestOptimization.UI\client\node_modules\@angular\compiler\bundles\compiler.umd.js:24034:70
    at Array.forEach (<anonymous>)
    at AotCompiler._compileImplFile (C:\ui\TestOptimization.UI\client\node_modules\@angular\compiler\bundles\compiler.umd.js:24034:23)
    at C:\ui\TestOptimization.UI\client\node_modules\@angular\compiler\bundles\compiler.umd.js:24024:74
    at Array.map (<anonymous>)
    at AotCompiler.emitAllImpls (C:\ui\TestOptimization.UI\client\node_modules\@angular\compiler\bundles\compiler.umd.js:24024:39)
    at AngularCompilerProgram.generateFilesForEmit (C:\ui\TestOptimization.UI\client\node_modules\@angular\compiler-cli\src\transformers\program.js:620:46)
    at AngularCompilerProgram._emitRender2 (C:\ui\TestOptimization.UI\client\node_modules\@angular\compiler-cli\src\transformers\program.js:266:47)
    at AngularCompilerProgram.emit (C:\ui\TestOptimization.UI\client\node_modules\@angular\compiler-cli\src\transformers\program.js:201:22)