🐞 bug report

Affected Package

ng2-charts https://github.com/valor-software/ng2-charts

Is this a regression?

Angular 8.2.6 works
Angular 9.0.0-next.5 fails

Description

Everything works as expected with 8.2.6
Upgrading to 9.0.0-next.5 fails to build (Ivy disabled, aot enabled)

🔬 Minimal Reproduction

I created a repository: https://github.com/whyboris/angular-ivy-problem-2

It was created with npm install -g @angular/cli@next and ng new angular-ivy-problem-2 which runs.

But simply adding ng2-charts fails compilation; see PR:
https://github.com/whyboris/angular-ivy-problem-2/pull/1/files

It is easy to fix, by simply downgrading from angular 9 to angular 8; see PR:
https://github.com/whyboris/angular-ivy-problem-2/pull/2/files

Another fix is to upgrade from ng2-charts version 1.6.0 to latest (2.3.0), see PR:
https://github.com/whyboris/angular-ivy-problem-2/pull/3/files

🔥 Exception or Error

ERROR in node_modules/ng2-charts/charts/charts.d.ts:53:22 - error TS-996002: Appears in the NgModule.imports of AppModule, but could not be resolved to an NgModule class

53 export declare class ChartsModule {
                        ~~~~~~~~~~~~
src/app/app.component.html:413:25 - error TS8002: 'ngSwitch' is not a valid property of 
.

413   

                            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  src/app/app.component.ts:5:16
    5   templateUrl: './app.component.html',
                     ~~~~~~~~~~~~~~~~~~~~~~
    Error occurs in the template of component AppComponent.
src/app/app.component.html:531:1 - error TS8001: 'router-outlet' is not a valid HTML element.

531 
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  src/app/app.component.ts:5:16
    5   templateUrl: './app.component.html',
                     ~~~~~~~~~~~~~~~~~~~~~~
    Error occurs in the template of component AppComponent.

** Angular Live Development Server is listening on localhost:4200, open your browser on http://localhost:4200/ **
ℹ ｢wdm｣: Failed to compile.
ℹ ｢wdm｣: Compiling...
95% emitting CopyPlugin    
    ERROR in node_modules/ng2-charts/charts/charts.d.ts(53,22): error TS-996002: Appears in the NgModule.imports of AppModule, but could not be resolved to an NgModule class
    src/app/app.component.html(413,25): error TS8002: 'ngSwitch' is not a valid property of 
.
    src/app/app.component.html(531,1): error TS8001: 'router-outlet' is not a valid HTML element.

🌍 Your Environment

Angular Version:

Angular CLI: 9.0.0-next.4
Node: 12.10.0
OS: darwin x64
Angular: 9.0.0-next.6
... animations, common, compiler, compiler-cli, core, forms
... language-service, platform-browser, platform-browser-dynamic
... router

Package                           Version
-----------------------------------------------------------
@angular-devkit/architect         0.900.0-next.4
@angular-devkit/build-angular     0.900.0-next.4
@angular-devkit/build-optimizer   0.900.0-next.4
@angular-devkit/build-webpack     0.900.0-next.4
@angular-devkit/core              9.0.0-next.4
@angular-devkit/schematics        9.0.0-next.4
@angular/cli                      9.0.0-next.4
@ngtools/webpack                  9.0.0-next.4
@schematics/angular               9.0.0-next.4
@schematics/update                0.900.0-next.4
rxjs                              6.4.0
typescript                        3.5.3
webpack                           4.39.3

Anything else relevant?
Very similar to another issue I opened: #32729

I think it's acceptable to expect users of Angular to upgrade external libraries they use (e.g. ng2-charts), but I wanted to note this since the original intention behind Angular 9 was that it would work out of the box for all users with minimal changes 🤷‍♂

Please keep up the wonderful work ❤️ 🙇 I love working with Angular and with the Angular team (the few times I have interacted) 🙌