debounceTime dropping values received in subscription

[maxkostow]

RxJS version: 5.4.2

Code to reproduce:

const s = new Subject()
s.debounceTime(0).subscribe(n => {
    if (n === 1) {
        s.next(2)
    }
    console.log(n)
})
s.next(1)

Expected behavior:
Should output -1-2

Actual behavior:
Output: -1

Additional information:
lastValue/hasValue are cleared out after _next is called synchronously.
https://github.com/ReactiveX/rxjs/blob/master/src/operator/debounceTime.ts#L98-L102

[kwonoj]

#2155 (comment)

Basically Rx v5 doesn't guarantee reentrancy by default. If you explicitly observe in different scheduler like .observeOn(Rx.Scheduler.asap) then you can see it's not trapped anymore.

[maxkostow]

Cool, thanks that's exactly the workaround I came up with.

[lock]

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