ngc 5.X.X generates unused imports

[paulsouche]

Bug Report or Feature Request (mark with an x)

- [x] bug report -> please search issues before submitting
- [ ] feature request

Versions.

@angular/compiler-cli 5.0.0
node 8.6.0
npm 5.5.1
yarn 1.2.1
windows 10
ubuntu 17.10

Repro steps.

Use my repo

The log given by the failure.

No failure but problem with webpack later in the assets

Desired functionality.

ngc should not generate typings imports

Mention any other details that might be useful.

Hi,

I've noticed that since @angular/compiler 5.0.0 unused imports are generated.

Let's say I have a module 'my-module/types' exporting only interfaces and I import this module in an angular library. Previously in 4.X.X import {whatever} from 'my-module/types' were not generated by ngc. But now in 5.X.X, this is generated and unused. I don't think it's a typescript issue because if I run tsc compilation, it does not generate these imports.

ngc does not fail but I've issues when I import my module in webpack.

You can reproduce with my repo

Thanks anyway for the great job

EDIT

I have edited my repo and if we transpile like in angular@4 with annotationAs flags, imports are not generated. Hope it helps...

[alan-agius4]

Duplicate of angular/angular#21280

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