Entry component has no internal name when imported via module file

[CrispyBacon12]

Versions

Angular CLI: 1.6.3
Node: 8.9.4
OS: win32 x64
Angular: 5.2.0
... animations, common, compiler, compiler-cli, core, forms
... http, language-service, platform-browser
... platform-browser-dynamic, router

@angular/cli: 1.6.3
@angular-devkit/build-optimizer: 0.0.37
@angular-devkit/core: 0.0.24
@angular-devkit/schematics: 0.0.45
@ngtools/json-schema: 1.1.0
@ngtools/webpack: 1.9.3
@schematics/angular: 0.1.12
typescript: 2.4.2
webpack: 3.10.0

Repro steps

sample repo: https://github.com/CrispyBacon12/has-no-internal-name

• Create a new app
• Create a new module, with a component
• Define the component as an entryComponent in the module, and export it from that same module file
• Import the component via the module file and utilise it
  (import { NavigatorComponent } from './navigator/navigator.module')
• npm run build

Observed behavior

ERROR in chunk main [initial]
[name].[chunkhash:20].bundle.js
The export "NavigatorComponent" in "C:/Users/Chris/Web/GitHub/repro/src/app/navigator/navigator.module.ts" has no internal name
Error: The export "NavigatorComponent" in "C:/Users/Chris/Web/GitHub/repro/src/app/navigator/navigator.module.ts" has no internal name
    at getFinalName (C:\Users\Chris\Web\GitHub\repro\node_modules\webpack\lib\optimize\ConcatenatedModule.js:60:13)
    at info.globalScope.through.forEach.reference (C:\Users\Chris\Web\GitHub\repro\node_modules\webpack\lib\optimize\ConcatenatedModule.js:582:25)
    at Array.forEach (<anonymous>)
    at modulesWithInfo.forEach.info (C:\Users\Chris\Web\GitHub\repro\node_modules\webpack\lib\optimize\ConcatenatedModule.js:569:30)
    at Array.forEach (<anonymous>)
    at ConcatenatedModule.source (C:\Users\Chris\Web\GitHub\repro\node_modules\webpack\lib\optimize\ConcatenatedModule.js:567:19)
    at ModuleTemplate.render (C:\Users\Chris\Web\GitHub\repro\node_modules\webpack\lib\ModuleTemplate.js:14:31)
    at C:\Users\Chris\Web\GitHub\repro\node_modules\webpack\lib\Template.js:116:28
    at Function.from (native)
    at Chunk.mapModules (C:\Users\Chris\Web\GitHub\repro\node_modules\webpack\lib\Chunk.js:163:16)
    at ChunkTemplate.renderChunkModules (C:\Users\Chris\Web\GitHub\repro\node_modules\webpack\lib\Template.js:113:26)
    at ChunkTemplate.render (C:\Users\Chris\Web\GitHub\repro\node_modules\webpack\lib\ChunkTemplate.js:16:30)
    at Compilation.createChunkAssets (C:\Users\Chris\Web\GitHub\repro\node_modules\webpack\lib\Compilation.js:1397:35)
    at sealPart2 (C:\Users\Chris\Web\GitHub\repro\node_modules\webpack\lib\Compilation.js:655:10)
    at next (C:\Users\Chris\Web\GitHub\repro\node_modules\tapable\lib\Tapable.js:202:11)
    at Compilation.compilation.plugin (C:\Users\Chris\Web\GitHub\repro\node_modules\webpack\lib\ProgressPlugin.js:111:6)

Desired behavior

Expected build not to fail under these conditions

Mention any other details that might be useful (optional)

• This only occurs when using both --prod and AoT. Doing ng build --prod --aot false succeeds.
• Either importing the component directly, or via a separate barrel file, does not cause an error. Only when importing via the same module file that it is being declared in.
• No cyclic dependency warnings are shown, if that's the problem?
• Thanks

[filipesilva]

I think this is a simple counting bug. On AOT we elide (remove) unused imports when transforming files, and I think on the exports case we're counting times used wrong.