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TypeError: Cannot read property 'ngModule' of undefined

See original GitHub issue

🐞 bug report

Affected Package

The issue is caused by package @angular/core

Is this a regression?

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

i am not sure.

Description

A clear and concise description of the problem...

when i run ng test, the some unit case fail for this reason:

TypeError: Cannot read property 'ngModule' of undefined

TypeError: Cannot read property 'ngModule' of undefined
    at isModuleWithProviders (http://localhost:9876/_karma_webpack_/node_modules/@angular/core/__ivy_ngcc__/fesm2015/core.js:26229:18)
    at map (http://localhost:9876/_karma_webpack_/node_modules/@angular/core/__ivy_ngcc__/fesm2015/core.js:26223:9)
    at <Jasmine>
    at Function.get (http://localhost:9876/_karma_webpack_/node_modules/@angular/core/__ivy_ngcc__/fesm2015/core.js:25879:26)
    at getNgModuleDef (http://localhost:9876/_karma_webpack_/node_modules/@angular/core/__ivy_ngcc__/fesm2015/core.js:1853:29)
    at isNgModule (http://localhost:9876/_karma_webpack_/node_modules/@angular/core/__ivy_ngcc__/fesm2015/core.js:26232:14)
    at forEach (http://localhost:9876/_karma_webpack_/node_modules/@angular/core/__ivy_ngcc__/fesm2015/core.js:26174:14)
    at <Jasmine>
    at transitiveScopesFor (http://localhost:9876/_karma_webpack_/node_modules/@angular/core/__ivy_ngcc__/fesm2015/core.js:26172:32)
    at forEach (http://localhost:9876/_karma_webpack_/node_modules/@angular/core/__ivy_ngcc__/fesm2015/core.js:26179:31)
    at <Jasmine>
    at transitiveScopesFor (http://localhost:9876/_karma_webpack_/node_modules/@angular/core/__ivy_ngcc__/fesm2015/core.js:26172:32)
    at forEach (http://localhost:9876/_karma_webpack_/node_modules/@angular/core/__ivy_ngcc__/fesm2015/core.js:26179:31)
    at <Jasmine>
    at transitiveScopesFor (http://localhost:9876/_karma_webpack_/node_modules/@angular/core/__ivy_ngcc__/fesm2015/core.js:26172:32)

🔬 Minimal Reproduction

https://stackblitz.com/...

this is the private code. so i can not show the all code. I can only share the simplest case. ts code

import { ChangeDetectionStrategy, Component, Input } from '@angular/core';

@Component({
	selector: 'slate-initials-user-icon',
	templateUrl: './initials-user-icon.component.html',
	styleUrls: ['./initials-user-icon.component.scss'],
	changeDetection: ChangeDetectionStrategy.OnPush
})
export class InitialsUserIconComponent {
	@Input()
	public initials;
}

html

<p>
  {{ initials }}
</p>

test code

import { waitForAsync, ComponentFixture, TestBed } from '@angular/core/testing';

import { InitialsUserIconComponent } from './initials-user-icon.component';

describe('InitialsUserIconComponent', () => {
	let component: InitialsUserIconComponent;
	let fixture: ComponentFixture<InitialsUserIconComponent>;

	beforeEach(
		waitForAsync(() => {
			TestBed.configureTestingModule({
				declarations: [InitialsUserIconComponent]
			}).compileComponents();
		})
	);

	beforeEach(() => {
		fixture = TestBed.createComponent(InitialsUserIconComponent);
		component = fixture.componentInstance;
		fixture.detectChanges();
	});

	it('should create', () => {
		expect(component).toBeTruthy();
	});
});

🔥 Exception or Error




TypeError: Cannot read property 'ngModule' of undefined
    at isModuleWithProviders (http://localhost:9876/_karma_webpack_/node_modules/@angular/core/__ivy_ngcc__/fesm2015/core.js:26229:18)
    at map (http://localhost:9876/_karma_webpack_/node_modules/@angular/core/__ivy_ngcc__/fesm2015/core.js:26223:9)
    at <Jasmine>
    at Function.get (http://localhost:9876/_karma_webpack_/node_modules/@angular/core/__ivy_ngcc__/fesm2015/core.js:25879:26)
    at getNgModuleDef (http://localhost:9876/_karma_webpack_/node_modules/@angular/core/__ivy_ngcc__/fesm2015/core.js:1853:29)
    at isNgModule (http://localhost:9876/_karma_webpack_/node_modules/@angular/core/__ivy_ngcc__/fesm2015/core.js:26232:14)
    at forEach (http://localhost:9876/_karma_webpack_/node_modules/@angular/core/__ivy_ngcc__/fesm2015/core.js:26174:14)
    at <Jasmine>
    at transitiveScopesFor (http://localhost:9876/_karma_webpack_/node_modules/@angular/core/__ivy_ngcc__/fesm2015/core.js:26172:32)
    at forEach (http://localhost:9876/_karma_webpack_/node_modules/@angular/core/__ivy_ngcc__/fesm2015/core.js:26179:31)
    at <Jasmine>
    at transitiveScopesFor (http://localhost:9876/_karma_webpack_/node_modules/@angular/core/__ivy_ngcc__/fesm2015/core.js:26172:32)
    at forEach (http://localhost:9876/_karma_webpack_/node_modules/@angular/core/__ivy_ngcc__/fesm2015/core.js:26179:31)
    at <Jasmine>
    at transitiveScopesFor (http://localhost:9876/_karma_webpack_/node_modules/@angular/core/__ivy_ngcc__/fesm2015/core.js:26172:32)

🌍 Your Environment

Angular Version:




Angular CLI: 10.2.0
Node: 12.16.2
OS: darwin x64

Angular: 10.2.2
... animations, common, compiler, compiler-cli, core, forms
... language-service, localize, platform-browser
... platform-browser-dynamic, platform-server, router
... service-worker
Ivy Workspace: Yes

Package                            Version
------------------------------------------------------------
@angular-devkit/architect          0.1002.0
@angular-devkit/build-angular      0.1002.0
@angular-devkit/core               10.2.0
@angular-devkit/schematics         10.2.0
@angular/cdk                       10.2.7
@angular/cli                       10.2.0
@angular/fire                      6.0.4
@angular/flex-layout               10.0.0-beta.32
@angular/material                  10.2.7
@angular/material-moment-adapter   10.2.7
@schematics/angular                10.2.0
@schematics/update                 0.1002.0
rxjs                               6.6.3
typescript                         3.9.7

Anything else relevant?

Chrome version: Version 86.0.4240.183 (Official Build) (x86_64)

Issue Analytics

State:
Created 3 years ago
Comments:8 (6 by maintainers)

Top GitHub Comments

3reactions

damingerdaicommented, Nov 5, 2020

it looks like the circular dependency issue. when i fixed the circular dependency issue, this error has not exist. so i have an another question: how to throw error instead of circular dependency warning when building?

1reaction

JoostKcommented, Nov 5, 2020

In this case the circular dep must have occurred in user code, as the compiler refrains from introducing new cycles. So I don’t think that #38211 is relevant here.

I believe it’s not possible to error for circular deps; they aren’t always a problem. It may be possible for the runtime JIT logic to detect an undefined NgModule import and produce a more helpful error.