From 163982bc6ea96171bc1d500cb54434d25ef83d9f Mon Sep 17 00:00:00 2001
From: cheatfate <ka@hardcore.kiev.ua>
Date: Sat, 27 Oct 2018 20:08:19 +0300
Subject: [PATCH] Add assert on callSoon(nil)

---
 asyncdispatch2/asyncloop.nim | 1 +
 1 file changed, 1 insertion(+)

diff --git a/asyncdispatch2/asyncloop.nim b/asyncdispatch2/asyncloop.nim
index 7301355..e88a010 100644
--- a/asyncdispatch2/asyncloop.nim
+++ b/asyncdispatch2/asyncloop.nim
@@ -745,6 +745,7 @@ include asyncmacro2
 proc callSoon(cbproc: CallbackFunc, data: pointer = nil) =
   ## Schedule `cbproc` to be called as soon as possible.
   ## The callback is called when control returns to the event loop.
+  assert cbproc != nil
   let acb = AsyncCallback(function: cbproc, udata: data)
   getGlobalDispatcher().callbacks.addLast(acb)