ng build --aot not reporting where the errors are

🐞 Bug report

Command (mark with an x)

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

Is this a regression?

No

Description

ng build --aot reports an error in a html template, but does not state in which template file

🔬 Minimal Reproduction

I have created the sample project here

clone and run ng bulid --aot

🔥 Exception or Error

Expected output when running ng bulid --aot

...
chunk {styles} styles.js, styles.js.map (styles) 16.3 kB [initial] [rendered]

ERROR in : 'test-component' is not a known element:
1. If 'test-component' is an Angular component, then verify that it is part of this module.
2. If 'test-component' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas' of this component to suppress this message. ("<div style="text-align:center">
  [ERROR ->]<test-component></test-component>
</div>")

test-component is part of the test-module which is not imported in the app module, the error is correct but nowhere in the error states that the problem is in app.component.html:3

In a project with dozen of template files is quite hard to pinpoint where the error is.

🌍 Your Environment

Angular CLI: 7.3.9
Node: 10.14.2
OS: win32 x64
Angular: 7.2.15
... animations, common, compiler, compiler-cli, core, forms
... language-service, platform-browser, platform-browser-dynamic
... router

Package                           Version
-----------------------------------------------------------
@angular-devkit/architect         0.13.9
@angular-devkit/build-angular     0.13.9
@angular-devkit/build-optimizer   0.13.9
@angular-devkit/build-webpack     0.13.9
@angular-devkit/core              7.3.9
@angular-devkit/schematics        7.3.9
@angular/cli                      7.3.9
@ngtools/webpack                  7.3.9
@schematics/angular               7.3.9
@schematics/update                0.13.9
rxjs                              6.3.3
typescript                        3.2.4
webpack                           4.29.0

Anything else relevant? running ng build in git bash for windows

[mgechev]

Looks like this is a compiler issue. @alan-agius4 / @clydin we should probably transfer to angular/angular?

[pakopa]

info like app.component.html:3 should be useful too

I submitted this issue because I think this information is also crucial. Now it is only reporting the kind of error (that part is correct and with a great level of detail) but not where that error is. If I am using a custom component across dozens of templates, locating the one producing the error requires searching the output text across the whole project (current workaround). The build tools should make our life easier, not harder.

BTW, thank you for testing and confirming that this happens in v8 too