takeUntil doesn't work with ignoreElements

[ghost]

RxJS version:
5.5.2

Code to reproduce:

const { Observable } = require( 'rxjs' );

const done = Observable.timer( 1000 ).ignoreElements();

done
.subscribe(
    console.log.bind( console, 'done next' ),
    console.log.bind( console, 'done error' ),
    console.log.bind( console, 'done complete' )
);

Observable.timer( 0, 100 )
.takeUntil( done )
.subscribe(
    console.log.bind( console, 'next' ),
    console.log.bind( console, 'error' ),
    console.log.bind( console, 'complete' )
);

Expected behavior:
Timer completes when done completes.

Actual behavior:
Done completes, but timer continues to emit items.

Additional information:
According to http://reactivex.io/documentation/operators/takeuntil.html:

The TakeUntil subscribes and begins mirroring the source Observable. It also monitors a second Observable that you provide. If this second Observable emits an item or sends a termination notification, the Observable returned by TakeUntil stops mirroring the source Observable and terminates.

[ghost]

Just noticed this is a duplicate of #2160.

[benlesh]

Yeah.. this is to be expected.

complete isn't a single that you have something to use... it's a signal that you're not going to get anything to use. We really just need the docs to be updated, I think.

[lock]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.