Using publish() inside a pipe doesn't return a right type

[Pittan]

RxJS version:
6.0.0-uncanny-rc.7

Code to reproduce:
https://stackblitz.com/edit/rxjs6-publish-and-connect

Expected behavior:
It should be no error for TS compiler.

Actual behavior:
TS compiler outputs error, even when I added ConnectableObservable<any> to variable.

Additional information:

[evertbouw]

According to the TypeScript definition of pipe the output of an operator is always an Observable, but this is not the case with publish. To work around this, you can apply the operator outside of pipe:

import { interval } from 'rxjs';
import { filter, publish } from 'rxjs/operators';

const source = interval(400);

const observable = publish()(source.pipe(
  filter(x => x % 2 === 0),
));

observable.connect();

See also #2995

[Pittan]

@evertbouw
Looks weird to me... but it worked perfectly! Thank you!

[lock]

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