Child directive does not inherit parent directive's click handler

[g1shin]

I'm submitting a...

[ ] Regression (a behavior that used to work and stopped working in a new release)
[x] Bug report  
[ ] Feature request
[ ] Documentation issue or request
[ ] Support request => Please do not submit support request here, instead see https://github.com/angular/angular/blob/master/CONTRIBUTING.md#question

Current behavior

Child directive does not inherit parent directive's click handler.

Expected behavior

Child directive should inherit parent directive's click handler.

Minimal reproduction of the problem with instructions

http://plnkr.co/edit/6Q74FAmo9XkfIlYGaGt9?p=preview
Clicking on the base button logs 'click' on console, but clicking on the child button that extends the base button does not log 'click' on console.

What is the motivation / use case for changing the behavior?

Environment

Angular version: X.Y.Z


Browser:
- [x] Chrome (desktop) version XX
- [ ] Chrome (Android) version XX
- [ ] Chrome (iOS) version XX
- [ ] Firefox version XX
- [ ] Safari (desktop) version XX
- [ ] Safari (iOS) version XX
- [ ] IE version XX
- [ ] Edge version XX
 
For Tooling issues:
- Node version: XX  
- Platform:  

Others:

[trotyl]

This is the expected behavior according to the semantics described here:

only use the last decorator of each kind (e.g. @component / ...)

The entire @Directive metadata on base class will be overwritten by @Directive defined in derived class.

When changing to @HostListener('click') it will work as expected since it's a property decorator and didn't get overwritten.

"Fixing" this would be a breaking change for existing inheritance behavior.

[pkozlowski-opensource]

This works as expected in Angular v9 with ivy enabled: https://ng-run.com/edit/8KIr8DNkj82a7Fbj3Eyv

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