From a4c53b4346776b7a83d6ce50d68934ea7a1f3dde Mon Sep 17 00:00:00 2001
From: cheatfate <eugene.kabanov@status.im>
Date: Thu, 11 Apr 2019 00:24:37 +0300
Subject: [PATCH] Fix Windows compilation error.

---
 eth/async_utils.nim | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/eth/async_utils.nim b/eth/async_utils.nim
index 964bb6b..baabb85 100644
--- a/eth/async_utils.nim
+++ b/eth/async_utils.nim
@@ -9,9 +9,10 @@ proc catchOrQuit(error: Exception) =
     quit 1
 
 proc traceAsyncErrors*(fut: FutureBase) =
-  fut.addCallback do (arg: pointer):
+  proc continuation(arg: pointer) {.gcsafe.} =
     if not fut.error.isNil:
       catchOrQuit fut.error[]
+  fut.addCallback continuation
 
 template traceAwaitErrors*(fut: FutureBase) =
   let f = fut