 				return
 
 			if isFunction xthen
-				if isLongStackTrace
-					p[$prePromise] = x
-
 				settleXthen p, x, xthen
 			else
 				# 2.3.3.4

				str

		stack = if reason
			format(reason.stack) or reason
		else
			reason


	 * @return {Function} `(value) -> undefined` A resolve or reject function.
	###
	genSettler = (self, state) -> (value) ->
		settlePromise self, state, value

	###*
