flatMapLatest behaves differently from other flatMap* for synchronous Properties

[Matti Lankinen]

flatMapLatest seems to change the flatMap'ed Property to async whereas other flatMap* series keep the property synchronous.

For example code:

const Bacon = require("baconjs")  // baconjs@2.0.7
const flatMapP = Bacon.later(1, 1)
  .toProperty(0)
  .flatMap(x => Bacon.once(x))

const flatMapLatestP = Bacon.later(1, 1)
  .toProperty(0)
  .flatMapLatest(x => Bacon.once(x))

console.log(
  "properties?",
  flatMapP instanceof Bacon.Property,
  flatMapLatestP instanceof Bacon.Property,
)
flatMapP.log("flatMap")
flatMapLatestP.log("flatMapLatest")
console.log("sync")

Produces output:

properties? true true
flatMap 0
sync
flatMap 1
flatMap <end>
flatMapLatest 0
flatMapLatest 1
flatMapLatest <end>

Which one is correct or should they actually behave differently?

[Matthias Seemann]

Looks like a bug in .flatMapLatest.

[Juha Paananen]

Fixed in 2.0.9