Error when using exported interface

[slubowsky]

🐞 Bug report

Command (mark with an x)

- [ ] new
- [ ] build
- [x] serve
- [ ] test
- [ ] e2e
- [ ] generate
- [ ] add
- [ ] update
- [ ] lint
- [ ] xi18n
- [ ] run
- [ ] config
- [ ] help
- [ ] version
- [ ] doc

Is this a regression?

Yes, the previous version in which this bug was not present was: 8.0.3

(See "anything else relevant" section, exact bug has appeared and been fixed before)

Description

A clear and concise description of the problem...

Using an exported interface produces an error, app is not served.

🔬 Minimal Reproduction

export an interface:

export interface AppConfig {..}
export let APP_CONFIG = new InjectionToken<AppConfig>('app.config');

Import it elsewhere:
import { APP_CONFIG, AppConfig } from '../app.config';
Use it:

export class MyService {
  constructor(@Inject(APP_CONFIG) config: AppConfig,...
  ...
}

🔥 Exception or Error

ng serve

ERROR in ./src/app/shared/my.service.ts 20:12-21
"export 'AppConfig' was not found in '../app.config'

App is not served. Havent tried build.

🌍 Your Environment

Angular CLI: 8.0.4
Node: 12.4.0
OS: win32 x64
Angular: 8.0.2
... animations, common, compiler, compiler-cli, core, forms
... language-service, platform-browser, platform-browser-dynamic
... router, service-worker

Package                           Version
-----------------------------------------------------------
@angular-devkit/architect         0.800.4
@angular-devkit/build-angular     0.800.4
@angular-devkit/build-optimizer   0.800.4
@angular-devkit/build-webpack     0.800.4
@angular-devkit/core              8.0.4
@angular-devkit/schematics        8.0.4
@angular/cli                      8.0.4
@angular/pwa                      0.800.4
@ngtools/webpack                  8.0.4
@schematics/angular               8.0.4
@schematics/update                0.800.4
rxjs                              6.5.2
typescript                        3.4.5
webpack                           4.30.0

Anything else relevant?
Had this exact issue almost 3 years ago - #2034 (comment). That issue has so many comments that I forget exactly how it was actually resolved, but it was, and warning eventually went away. Now its back.
At that time it was a warning and was ignorable. This time its an error and app is not served...

[mlc-mlapis]

We have the same problem after upgrading to CLI 8.0.4. The files are imported correctly and are on correct paths, but ng serve still reports that DataFilters are not found in dataFilters.interface.

ERROR in ./src/app/modules/homepage/components/homepage/classes/profileHelpers.class.ts 25:12-23
"export 'DataFilters' was not found in '../../../interfaces/dataFilters.interface'

[ICesarI]

We have a similar issue too. Our pipeline was installing Ng CLI 8.0.4 instead of 8.0.0 so when executing the tests the 'MatDialog' were failing showing the error: Failed: DialogData is not defined
Look a similar example at Dialog

[martinbu]

Same issue here. It seems that the issue was introduced with version 0.800.4 of the @angular-devkit/build-angular as already stated. If I explicitly install version 0.800.3 my application compiles with no error.

For everyone who needs a temporary solution npm install @angular-devkit/build-angular@0.800.3 should fix the problem for now.

[dottodot]

I've seeing the same issue reverting back to build-angular@0.800.3 resolves it.

[alfaproject]

Same problem here. Adding a comment for awareness. ):

[peter-poki]

Same problem here but downgrade back to build-angular@0.800.3 resolves it.