Simple ReactiveCoffee app leaks as well as Knockout version. Moreover due to its internal design it leaks pretty fast and just like knockout app it doesn't look suspicious at all.
This app leaks incredible fast: click several times on 'add' button, few times on 'inc' button and then on 'clear' button and repeat the process. You'll see that the number of subscriptions only increases and does it fast.
CoffeeScript
bind = rx.bind
rxt.importTags()
adds = 0
handlers = rx.cell(0)
driver = rx.cell(0)
items = rx.array()
clear = (list) ->
while list.raw().length!=0
list.remove(list.raw()[0])
$ ->
$('.coffee').prepend(
div [
div bind -> ["Number of subscriptions to 'driver': #{handlers.get()}"]
div [
button {
click: ->
driver.set(driver.get()+1)
handlers.set(driver.onSet.subs.length)
}, "inc"
button {
click: ->
offset = adds++
item = bind -> driver.get() + offset
items.push(item)
handlers.set(driver.onSet.subs.length)
}, "add"
button {
click: ->
clear(items)
handlers.set(driver.onSet.subs.length)
}, "clear"
div items.map (item) ->
div bind -> ["#{item.get()}"]
]
]
)