Weird compilation errors during the update from Angular 8.3.15 to Angular 9 RC7

Affected Package

Not sure

Is this a regression?

Yes, everything was working fine in Angular 8.3.15

Description

After I executed ng update @angular/cli @angular/core --next I got the following errors:

    Error: error TS100: Error during template compile of 'RoutingHelper'
      Function calls are not supported in decorators but 'RestaurantManagerRoutingConstants' was called.
    error TS100: Error during template compile of 'RoutingHelper'
      Function calls are not supported in decorators but 'RestaurantManagerRoutingConstants' was called.
    error TS100: Error during template compile of 'RoutingHelper'
      Function calls are not supported in decorators but 'RestaurantManagerRoutingConstants' was called.
    error TS100: Error during template compile of 'RoutingHelper'
      Function calls are not supported in decorators but 'RestaurantManagerRoutingConstants' was called.
    error TS100: Error during template compile of 'RoutingHelper'
      Function calls are not supported in decorators but 'RestaurantManagerRoutingConstants' was called.
    error TS100: Error during template compile of 'RoutingHelper'
      Function calls are not supported in decorators but 'RestaurantManagerRoutingConstants' was called.
    error TS100: Error during template compile of 'RoutingHelper'
      Function calls are not supported in decorators but 'RestaurantManagerRoutingConstants' was called.
    error TS100: Error during template compile of 'RoutingHelper'
      Function calls are not supported in decorators but 'RestaurantManagerRoutingConstants' was called.
    error TS100: Error during template compile of 'RoutingHelper'
      Function calls are not supported in decorators but 'RestaurantManagerRoutingConstants' was called.
    error TS100: Unexpected value 'OrderlyWebComponentsModule in E:/.../orderly-web-apps/dist/orderly-web-components/lib/orderly-web-components.module.d.ts' imported by the module 'AppModule in E:/.../orderly-web-apps/projects/restaurant-admin-web/src/app/app.module.ts'. Please add a @NgModule annotation.
    error TS100: UpdateUserProfileComponent cannot be used as an entry component.

First, there are no details about these errors:

    error TS100: Error during template compile of 'RoutingHelper'
      Function calls are not supported in decorators but 'RestaurantManagerRoutingConstants' was called.

I have no idea why it stopped compiling. It would be great to get at least file name where this error happened.

Second, all my modules are attributed with @NgModule. OrderlyWebComponentsModule is a separate library with commonly used components and is also decorated as following:

@NgModule({
            declarations: [
              ...
              UpdateUserProfileComponent,
              ...
            ],
            imports: [ ... ],
            exports: [
              ...
              UpdateUserProfileComponent,
              ...
            ]
          })
export class OrderlyWebComponentsModule {}

public-api.ts file contains following references

...
export * from './lib/update-user-profile/update-user-profile.component';
...
export * from './lib/orderly-web-components.module';

Therefore the last error doesn’t make any sense:

error TS100: Unexpected value 'OrderlyWebComponentsModule in E:/PROJECTS/Orderly/Orderly.AngularClient/AngularApps/orderly-web-apps/dist/orderly-web-components/lib/orderly-web-components.module.d.ts' imported by the module 'AppModule in E:/PROJECTS/Orderly/Orderly.AngularClient/AngularApps/orderly-web-apps/projects/restaurant-admin-web/src/app/app.module.ts'. Please add a @NgModule annotation.

🔬 Minimal Reproduction

Still not sure what causes this behavior. In my case I just have one local library that is imported into a project.

🌍 Your Environment

Angular Version:

Angular CLI: 9.0.0-rc.7
Node: 10.16.3
OS: win32 x64

Angular: 9.0.0-rc.7
... animations, cli, common, compiler, compiler-cli, core, forms
... language-service, platform-browser, platform-browser-dynamic
... router
Ivy Workspace: Yes

Package                            Version
------------------------------------------------------------
@angular-devkit/architect          0.900.0-rc.7
@angular-devkit/build-angular      0.900.0-rc.7
@angular-devkit/build-ng-packagr   0.900.0-rc.7
@angular-devkit/build-optimizer    0.900.0-rc.7
@angular-devkit/build-webpack      0.900.0-rc.7
@angular-devkit/core               9.0.0-rc.7
@angular-devkit/schematics         9.0.0-rc.7
@ngtools/webpack                   9.0.0-rc.7
@schematics/angular                9.0.0-rc.7
@schematics/update                 0.900.0-rc.7
ng-packagr                         9.0.0-rc.3
rxjs                               6.5.3
typescript                         3.6.4
webpack                            4.41.2

[mrtungdev]

@usarskyy aren’t entryComponents deprecated in NG9 ?

Yes, more deprecated detail: https://next.angular.io/guide/deprecations

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