AOT Build silent fail using scss file templates named 'xxxx.TS.scss' #8904

Versions

Angular CLI: 1.6.1
Node: 8.9.1
OS: win32 x64
Angular: 5.1.1
... animations, common, compiler, compiler-cli, core, forms
... http, language-service, platform-browser
... platform-browser-dynamic, router

@angular/cli: 1.6.1
@angular-devkit/build-optimizer: 0.0.36
@angular-devkit/core: 0.0.22
@angular-devkit/schematics: 0.0.42
@ngtools/json-schema: 1.1.0
@ngtools/webpack: 1.9.1
@schematics/angular: 0.1.11
@schematics/schematics: 0.0.11
typescript: 2.4.2
webpack: 3.10.0

Repro steps

Run command

ng new tsbug --style=scss
cd tsbug
mv src/app/app.component.scss src/app/app.component.ts.scss
sed -i 's/.scss/.ts.scss/g' src/app/app.component.ts
ng build --aot

(it just creates a new ng app using scss file named app.component.ts.scss, then AOT-builds it)

=> AOT build fails silently

nb1: ng build without --aot works like a charm.

nb2: this only happens when file is named xxx.TS.scss, see details below

nb3: this only happens with files that require a loader (not on html, or css ... i originally had this because i use a loader for .pug template files) and not only for styleUrls, but also templateUrl

Observed behavior

AOT build fails silently

Desired behavior

I would expect it to build, or at least yield a build error

Mention any other details that might be useful (optional)

Everything works fine with loaders, as long as your file names do not contain .ts

See app.component.ts

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html'
  styleUrls: ['./app.component.ts.scss'],  // <==== this one fails silently on ng build --aot
//  styleUrls: ['./app.component.scss'] // <==== this one is OK
})
export class AppComponent {
}

i assume there must be somewhere in the cli a /\.ts/.test(filename) that requires a $, or something of that kind ?