navigateToRoute can't be awaited in activate method

[tomschluter]

I'm submitting a bug report

• Library Version:
  major.minor.patch-pre

Please tell us about your environment:

• Operating System:
  Windows 10

• Node Version:
  8.11.3

• NPM Version:
  6.3.0

• JSPM OR Webpack AND Version
  webpack 4.1.1

• Browser:
  Chrome 69 | Firefox 61

• Language:
  TypeScript 2.9.2 - 3.0.3

Current behavior:
Even though navigateToRoute returns a promise, I can't seem to await it in the activate method. I can await it in any other function and it works perfectly, but when awaiting navigateToRoute in the activate method it hangs.

Expected/desired behavior:
Our TSLint expects all promises to be handled accordingly, so I figured I should be able to await it, like I do in other functions.

I have recreated the bug in a small project:
https://github.com/tomschluter/await-navigate-to-route

async activate() { await this.router.navigateToRoute('Contact'); }

The above is pretty much what causes the application to hang.

• What is the motivation / use case for changing the behavior?
  Unless it is intended, it currently isn't working how it should be.

[bigopon]

I think this may not be a good feature, since it could lead to unresolved promise.
cc @davismj