From 546cc36d79d0ed104b95304922cf331fd0ca2f4b Mon Sep 17 00:00:00 2001
From: Dmitriy Ryajov <dryajov@gmail.com>
Date: Tue, 24 Dec 2019 13:23:45 -0600
Subject: [PATCH] fix: avoid completing future twise

---
 chronos/asyncloop.nim | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/chronos/asyncloop.nim b/chronos/asyncloop.nim
index 68cd5417..6fee7045 100644
--- a/chronos/asyncloop.nim
+++ b/chronos/asyncloop.nim
@@ -855,7 +855,7 @@ proc wait*[T](fut: Future[T], timeout = InfiniteDuration): Future[T] =
 
   proc continuation(udata: pointer) {.gcsafe.} =
     if not(retFuture.finished()):
-      if isNil(udata):
+      if not(fut.finished()):
         # Timer exceeded first.
         fut.removeCallback(continuation)
         fut.cancel()