From 00fbc9246ea033469d50e3ad06f47e4209703c13 Mon Sep 17 00:00:00 2001
From: Dmitriy Ryajov <dryajov@gmail.com>
Date: Tue, 7 Apr 2020 09:49:56 -0600
Subject: [PATCH] fix nil condition

---
 libp2p/transports/tcptransport.nim | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libp2p/transports/tcptransport.nim b/libp2p/transports/tcptransport.nim
index f2af4da..cbd2985 100644
--- a/libp2p/transports/tcptransport.nim
+++ b/libp2p/transports/tcptransport.nim
@@ -57,7 +57,7 @@ method close*(t: TcpTransport): Future[void] {.async, gcsafe.} =
   await procCall Transport(t).close() # call base
 
   # server can be nil
-  if isNil(t.server):
+  if not isNil(t.server):
     t.server.stop()
     t.server.close()
     await t.server.join()