CdkPortalOutlet hasAttached not called when using attachComponentPortal

[probert94]

Bug, feature request, or proposal:

Bug report

What is the expected behavior?

When I attach a Component or a Template to a CdkPortalOutlet using attachComponentPortal or attachTemplatePortal, I expect that hasAttached returns true.

What is the current behavior?

hasAttached always returns false, except, when using the cdkPortalOutlet-input t oset the portal.

What are the steps to reproduce?

1. Create a Component, which contains a cdkPortalOutlet.
2. Get a reference to the CdkPortalOutlet-Directive using @ViewChild(CdkPortalOutlet).
3. Attach a Template to it, using attachTemplatePortal.
4. Call hasAttached() which should return false.

Which versions of Angular, Material, OS, TypeScript, browsers are affected?

I am using Angular Material+CDK version 5.0.0-rc.1 as awell as Angular version 5.0.3

Is there anything else we should know?

The problem is in portal-directives.ts#L114 and portal-directives.ts#L129, where this._portal = portal should probably be this.portal = portal, so that the setter is called and updates the _attachedPortal of the super-class.

[angular-automatic-lock-bot]

This issue has been automatically locked due to inactivity.
Please file a new issue if you are encountering a similar or related problem.

Read more about our automatic conversation locking policy.

_{This action has been performed automatically by a bot.}