TypeError : meta is undefined, @angular-devkit/build-angular: 0.800.3 => 0.800.4

[cedx]

🐞 Bug report

Command (mark with an x)

- [ ] new
- [ ] build
- [ ] serve
- [x] test
- [ ] e2e
- [ ] generate
- [ ] add
- [ ] update
- [ ] lint
- [ ] xi18n
- [ ] run
- [ ] config
- [ ] help
- [ ] version
- [ ] doc

Is this a regression?

Yes, the previous version in which this bug was not present was:
@angular-devkit/build-angular: 0.800.3

Description

This project : https://github.com/cedx/ngx-core.js
has tests that worked fine until I upgraded @angular-devkit/build-angular to version 0.800.4 (i.e. if I revert this package, and only this package, to version 0.800.3, everything is OK).

🔬 Minimal Reproduction

I have absolutely no idea how to reproduce this bug. The stack trace is unreadable for me, so I don't know where and how to start investigations.

🔥 Exception or Error

TypeError: meta is undefined in http://localhost:9876/_karma_webpack_/vendor.js (line 38610)
	error properties: Object({ ngDebugContext: DebugContext_({ view: Object({ def: Object({ factory: Function, nodeFlags: 33603585, rootNodeFlags: 33554433, nodeMatchedQueries: 0, flags: 0, nodes: [ Object({ nodeIndex: 0, parent: null, renderParent: null, bindingIndex: 0, outputIndex: 0, checkIndex: 0, flags: 33554433, childFlags: 49152, directChildFlags: 49152, childMatchedQueries: 0, matchedQueries: Object({  }), matchedQueryIds: 0, references: Object({  }), ngContentIndex: null, childCount: 1, bindings: [  ], bindingFlags: 0, outputs: [  ], element: Object({ ns: '', name: 'test-component', attrs: [  ], template: null, componentProvider: Object({ nodeIndex: 1, parent: , renderParent: , bindingIndex: 0, outputIndex: 0, checkIndex: 1, flags: 49152, childFlags: 0, directChildFlags: 0, childMatchedQueries: 0, matchedQueries: Object, matchedQueryIds: 0, references: Object, ngContentIndex: -1, childCount: 0, bindings: Array, bindingFlags: 0, outputs: Array ...
	injectArgs@http://localhost:9876/_karma_webpack_/vendor.js:38610:21
	convertInjectableProviderToFactory/<@http://localhost:9876/_karma_webpack_/vendor.js:39201:27
	_callFactory@http://localhost:9876/_karma_webpack_/vendor.js:61211:20
	_createProviderInstance@http://localhost:9876/_karma_webpack_/vendor.js:61154:26
	resolveNgModuleDep@http://localhost:9876/_karma_webpack_/vendor.js:61113:17
	get@http://localhost:9876/_karma_webpack_/vendor.js:62206:16
	resolveDep@http://localhost:9876/_karma_webpack_/vendor.js:62736:45
	createClass@http://localhost:9876/_karma_webpack_/vendor.js:62580:29
	createDirectiveInstance@http://localhost:9876/_karma_webpack_/vendor.js:62400:22
	createViewNodes@http://localhost:9876/_karma_webpack_/vendor.js:73006:38
	createRootView@http://localhost:9876/_karma_webpack_/vendor.js:72878:5
	callWithDebugContext@http://localhost:9876/_karma_webpack_/vendor.js:74407:27
	debugCreateRootView@http://localhost:9876/_karma_webpack_/vendor.js:73644:12
	create@http://localhost:9876/_karma_webpack_/vendor.js:61542:31
	initComponent@http://localhost:9876/_karma_webpack_/vendor.js:78325:51
	./node_modules/zone.js/dist/zone.js/
	runInTestZone/

🌍 Your Environment

Angular CLI: 8.0.4
Node: 12.4.0
OS: linux x64
Angular: 8.0.2
... common, compiler, compiler-cli, core, language-service
... platform-browser, platform-browser-dynamic, router

Package                            Version
------------------------------------------------------------
@angular-devkit/architect          0.800.4
@angular-devkit/build-angular      0.800.4
@angular-devkit/build-ng-packagr   0.800.4
@angular-devkit/build-optimizer    0.800.4
@angular-devkit/build-webpack      0.800.4
@angular-devkit/core               8.0.4
@angular-devkit/schematics         8.0.4
@angular/cli                       8.0.4
@ngtools/json-schema               1.1.0
@ngtools/webpack                   8.0.4
@schematics/angular                8.0.4
@schematics/update                 0.800.4
ng-packagr                         5.3.0
rxjs                               6.5.2
typescript                         3.4.5
webpack                            4.30.0

Anything else relevant?

Using Chrome instead of Firefox does not change anything: the error is still raised.

The tests (https://github.com/cedx/ngx-core.js/blob/master/test/directives/document_title_test.ts) involve a directive (https://github.com/cedx/ngx-core.js/blob/master/src/directives/document_title.ts#L27) that depends on a service (https://github.com/cedx/ngx-core.js/blob/master/src/services/application.ts#L64) that uses the Meta service.

I rely on the error message: meta is undefined. But again, I have absolutely no idea of the origin of the error.

EDIT : https://travis-ci.com/cedx/ngx-core.js/builds/116878254, if it helps.

[alan-agius4]

Possibly related to #14888

[cedx]

After upgrading to Angular v8.1.0 and @angular-devkit/build-angular v0.801.0, the error is gone 😄
I think we can say that the issue has been fixed.

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