newest asyncdispatch recursion

[cheatfate]

With latest changes to asyncdispatch this small piece of code causes Stack overflow.

import asyncdispatch

proc someProc(): Future[int] {.async.} =
  return 1

proc otherProc() {.async.} =
  var i = 0
  while i < 10_000:
    var c = await someProc()

when isMainModule:
  var t = otherProc()
  asyncCheck(t)

Traceback (most recent call last)
asyncrec.nim(12)         asyncrec
asyncmacro.nim(387)      otherProc
asyncmacro.nim(41)       cb
asyncfutures.nim(212)    callback=
asyncfutures.nim(191)    addCallback
asyncfutures.nim(53)     callSoon
asyncmacro.nim(41)       cb
asyncfutures.nim(212)    callback=
asyncfutures.nim(191)    addCallback
asyncfutures.nim(53)     callSoon
asyncmacro.nim(41)       cb
asyncfutures.nim(212)    callback=
asyncfutures.nim(191)    addCallback
asyncfutures.nim(53)     callSoon
asyncmacro.nim(41)       cb
asyncfutures.nim(212)    callback=
asyncfutures.nim(191)    addCallback
asyncfutures.nim(53)     callSoon
asyncmacro.nim(41)       cb
asyncfutures.nim(212)    callback=
asyncfutures.nim(191)    addCallback
asyncfutures.nim(53)     callSoon
asyncmacro.nim(41)       cb
asyncfutures.nim(212)    callback=
asyncfutures.nim(191)    addCallback
asyncfutures.nim(53)     callSoon
asyncmacro.nim(41)       cb
asyncfutures.nim(212)    callback=
asyncfutures.nim(191)    addCallback
asyncfutures.nim(53)     callSoon
asyncmacro.nim(41)       cb
(1874 calls omitted) ...
asyncfutures.nim(53)     callSoon
asyncmacro.nim(41)       cb
asyncfutures.nim(212)    callback=
asyncfutures.nim(191)    addCallback
asyncfutures.nim(53)     callSoon
asyncmacro.nim(41)       cb
asyncfutures.nim(212)    callback=
asyncfutures.nim(191)    addCallback
asyncfutures.nim(53)     callSoon
asyncmacro.nim(41)       cb
asyncfutures.nim(212)    callback=
asyncfutures.nim(191)    addCallback
asyncfutures.nim(53)     callSoon
asyncmacro.nim(41)       cb
asyncfutures.nim(212)    callback=
asyncfutures.nim(191)    addCallback
asyncfutures.nim(53)     callSoon
asyncmacro.nim(41)       cb
asyncfutures.nim(212)    callback=
asyncfutures.nim(191)    addCallback
asyncfutures.nim(53)     callSoon
asyncmacro.nim(41)       cb
asyncfutures.nim(212)    callback=
asyncfutures.nim(191)    addCallback
asyncfutures.nim(53)     callSoon
asyncmacro.nim(41)       cb
asyncfutures.nim(212)    callback=
asyncfutures.nim(191)    addCallback
asyncfutures.nim(53)     callSoon
asyncmacro.nim(41)       cb
asyncfutures.nim(212)    callback=
asyncfutures.nim(191)    addCallback
asyncfutures.nim(53)     callSoon
asyncmacro.nim(41)       cb
asyncfutures.nim(212)    callback=
asyncfutures.nim(191)    addCallback
asyncfutures.nim(53)     callSoon
asyncmacro.nim(41)       cb
asyncfutures.nim(212)    callback=
asyncfutures.nim(191)    addCallback
asyncfutures.nim(53)     callSoon
asyncmacro.nim(41)       cb
asyncfutures.nim(212)    callback=
asyncfutures.nim(191)    addCallback
asyncfutures.nim(53)     callSoon
asyncmacro.nim(41)       cb
asyncfutures.nim(212)    callback=
asyncfutures.nim(191)    addCallback
asyncfutures.nim(53)     callSoon
asyncmacro.nim(41)       cb
asyncfutures.nim(212)    callback=
asyncfutures.nim(191)    addCallback
asyncfutures.nim(53)     callSoon
asyncmacro.nim(41)       cb
asyncfutures.nim(212)    callback=
asyncfutures.nim(191)    addCallback
asyncfutures.nim(53)     callSoon
asyncmacro.nim(41)       cb
asyncfutures.nim(212)    callback=
asyncfutures.nim(191)    addCallback
asyncfutures.nim(53)     callSoon
asyncmacro.nim(41)       cb
asyncfutures.nim(212)    callback=
asyncfutures.nim(191)    addCallback
asyncfutures.nim(53)     callSoon
asyncmacro.nim(41)       cb
asyncfutures.nim(212)    callback=
asyncfutures.nim(191)    addCallback
asyncfutures.nim(53)     callSoon
asyncmacro.nim(41)       cb
asyncfutures.nim(212)    callback=
asyncfutures.nim(191)    addCallback
asyncfutures.nim(53)     callSoon
asyncmacro.nim(41)       cb
asyncfutures.nim(212)    callback=
asyncfutures.nim(191)    addCallback
asyncfutures.nim(53)     callSoon
asyncmacro.nim(34)       cb
asyncrec.nim(9)          otherProcIter
asyncrec.nim(3)          someProc
asyncfutures.nim(61)     newFuture
gc.nim(618)              growObj
gc.nim(563)              growObj
alloc.nim(583)           rawAlloc
avltree.nim(67)          add
avltree.nim(67)          add
avltree.nim(67)          add
avltree.nim(67)          add
avltree.nim(67)          add
avltree.nim(67)          add
avltree.nim(67)          add
avltree.nim(67)          add
avltree.nim(67)          add
avltree.nim(67)          add
avltree.nim(67)          add
avltree.nim              add
Stack overflow

[dom96]

Yes, we discussed this in the PR. You need to initialize the event loop.

[cheatfate]

Just to be sure, you don't forget to fix it.

[cheatfate]

Also if i understand PR correctly you introduced this bug again, to allow developers use Futures without Dispatcher. Earlier this use-case was prohibited, but with newest PR its possible again.
So this is an issue for new use-case of Futures usage.