My current Angular 2 project started before Angular supported the AOT feature. Now, I’m trying to get it to work. I'm receiving the following error and I've no clue what this means and where I can start to debug the issue:
ERROR in Error: Internal error: unknown identifier undefined
at Object.importExpr$$1 [as importExpr] (...\node_modules\@angular\compiler\bundles\compiler.umd.js:24211:23)
at tokenExpr (...\node_modules\@angular\compiler\bundles\compiler.umd.js:18577:39)
at providerDef (...\node_modules\@angular\compiler\bundles\compiler.umd.js:18480:20)
at ...\node_modules\@angular\compiler\bundles\compiler.umd.js:18697:77
at Array.map (<anonymous>)
at NgModuleCompiler.compile (...\node_modules\@angular\compiler\bundles\compiler.umd.js:18697:44)
at AotCompiler._compileModule (...\node_modules\@angular\compiler\bundles\compiler.umd.js:24144:32)
at ...\node_modules\@angular\compiler\bundles\compiler.umd.js:24056:66
at Array.forEach (<anonymous>)
at AotCompiler._compileImplFile (...\node_modules\@angular\compiler\bundles\compiler.umd.js:24056:19)
at ...\node_modules\@angular\compiler\bundles\compiler.umd.js:23969:87
at Array.map (<anonymous>)
at AotCompiler.emitAllImpls (...\node_modules\@angular\compiler\bundles\compiler.umd.js:23969:52)
at CodeGenerator.emit (...\node_modules\@angular\compiler-cli\src\codegen.js:42:46)
at ...\node_modules\@angular\compiler-cli\src\codegen.js:33:61
at <anonymous>
at process._tickCallback (internal/process/next_tick.js:188:7)
Dependencies
"@angular/animations": "^4.4.4",
"@angular/common": "^4.4.4",
"@angular/compiler": "^4.4.4",
"@angular/core": "^4.4.4",
"@angular/forms": "^4.4.4",
"@angular/platform-browser": "^4.4.4",
"@angular/platform-browser-dynamic": "^4.4.4",
"@angular/router": "^4.4.4",
"@ngx-translate/core": "^8.0.0",
"@ngx-translate/http-loader": "^2.0.0",
"core-js": "^2.5.1",
"font-awesome": "^4.7.0",
"primeng": "^4.2.1",
"quill": "^1.3.2",
"rxjs": "^5.4.3",
"zone.js": "^0.8.18"
Has anyone an idea why this error occurs?
I faced the same error in my Angular 6 project.
when you run "ng build --prod", read the warning messages carefully. In which file it throws warning message (for eg:dataservice.ts).
then go to that (dataService.ts) file and remove the @Injectable.
@Injectable({
providedIn: 'root'
})
Then try to build again. It works for me.