🐞 bug report

Affected Package

packages/core/src/linker/ng_module_factory_registration.ts

export function registerNgModuleType(ngModuleType: NgModuleType) {
 // If id emod is undefined an error is thrown.
 if (ngModuleType.ɵmod.id !== null) {

Is this a regression?

No

Description

This line:

ngModuleType.ɵmod.id !== null

Results in this:

Uncaught TypeError: Cannot read property 'id' of undefined
    at registerNgModuleType (core.js:36228)
    at core.js:36246
    at Array.forEach (<anonymous>)
    at registerNgModuleType (core.js:36242)
    at core.js:36246
    at Array.forEach (<anonymous>)
    at registerNgModuleType (core.js:36242)
    at new NgModuleFactory$1 (core.js:36407)
    at compileNgModuleFactory__POST_R3__ (core.js:42296)
    at PlatformRef.bootstrapModule (core.js:42663)

Would be nice to catch the error and tell the user which module is failing.

This was failing in the MatPaginator module. It is probably an incorrect import but not sure yet.

I've written an article on the journey to determine root cause.

🌍 Your Environment

Angular Version:

Angular CLI: 9.1.8
Node: 12.18.0
OS: win32 x64

Angular: 9.1.11
... animations, common, compiler, compiler-cli, core, forms
... language-service, platform-browser, platform-browser-dynamic
... router
Ivy Workspace: Yes

Package                            Version
------------------------------------------------------------
@angular-devkit/architect          0.901.8
@angular-devkit/build-angular      0.901.8
@angular-devkit/build-ng-packagr   0.901.8
@angular-devkit/build-optimizer    0.901.8
@angular-devkit/build-webpack      0.901.8
@angular-devkit/core               9.1.8
@angular-devkit/schematics         9.1.8
@angular/cdk                       9.2.4
@angular/cli                       9.1.8
@angular/material                  9.2.4
@ngtools/webpack                   9.1.8
@schematics/angular                9.1.8
@schematics/update                 0.901.8
ng-packagr                         9.1.5
rxjs                               6.5.5
typescript                         3.7.5
webpack                            4.42.0

Anything else relevant?

No