🐞 bug report

Affected Package

@angular/compiler-cli

Is this a regression?

Yes

Description

The NGCC incorrectly compiles the @ngxs/router-plugin as UMD.

🔬 Minimal Reproduction

https://github.com/arturovt/ivy-ngxs-router-plugin-umd-repro

• clone and install dependencies
• check the postinstall script

Or open the node_modules/@ngxs/router-plugin/bundles/ngxs-router-plugin.umd file in your IDE and see the generated code at the end of the factory(....) function. This has to be something like global...modules.ngxsFeature.module.

Providing screenshot below (this is how it looks like on my PC):

🌍 Your Environment

Angular Version:

Angular CLI: 9.0.0-rc.4
Node: 12.11.1
OS: linux x64

Angular: 9.0.0-rc.4
... animations, cli, common, compiler, compiler-cli, core, forms
... platform-browser, platform-browser-dynamic, router
Ivy Workspace: Yes

Package                           Version
-----------------------------------------------------------
@angular-devkit/architect         0.900.0-rc.4
@angular-devkit/build-angular     0.900.0-rc.4
@angular-devkit/build-optimizer   0.900.0-rc.4
@angular-devkit/build-webpack     0.900.0-rc.4
@angular-devkit/core              9.0.0-rc.4
@angular-devkit/schematics        9.0.0-rc.4
@ngtools/webpack                  9.0.0-rc.4
@schematics/angular               9.0.0-rc.4
@schematics/update                0.900.0-rc.4
rxjs                              6.5.3
typescript                        3.6.4
webpack                           4.41.2

---

UPD

I could guess that it emits such code due to the inability to compile this package at all. The compiler behaves differently, because:

• in 80% of cases it compiles without errors and generates such code
• in 20% of cases it throws during compilation with:

Error: Error on worker #1: Error: Failed to compile entry-point @ngxs/router-plugin due to compilation errors:
node_modules/@ngxs/router-plugin/bundles/ngxs-router-plugin.umd.js(1034,34): error TS-991010: Value at position 0 in the NgModule.imports of NgxsRouterPluginModule is not a reference: [object Object]