.first() emits more than one value

[danrasmuson]

RxJS version:
Test on rxjs@5.0.0-beta. 8 - 11

Code to reproduce:

var x = Rx.Observable.from(new Rx.Subject());
var z = x.filter((num) => num === 3);

z.take(1).subscribe(()=>{
  console.log('take1')
  z.next(3)
})

z.first().subscribe(()=>{
  console.log('first')
  // z.next(3) // <-- infinite loop
})

z.next(3)

Expected behavior:
I would expect .take(1) and .first() to behave the same.

Actual behavior:
.take(1) only accepts one item from the emitted stream. While .first() will accept values if the emitter is within the on subscribe function.

[kwonoj]

It seems dupe of #1759 - @danielrasmuson , would you able to confirm if this is same case? (comment #1759 (comment) / #1759 (comment) as well)

[danrasmuson]

👍 Yes it does look like a dupe.

[lock]

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