From efc98098b42e2ba2474cba015eabc7272378e6a8 Mon Sep 17 00:00:00 2001
From: Kenneth Shaw <kenneth.shaw@knq.io>
Date: Wed, 22 Feb 2017 15:27:38 +0700
Subject: [PATCH] Fixing panic on Pool.Release

---
 pool.go | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/pool.go b/pool.go
index 18eed24..5a0dc63 100644
--- a/pool.go
+++ b/pool.go
@@ -145,7 +145,10 @@ type Res struct {
 func (r *Res) Release() error {
 	r.cancel()
 
-	err := r.c.Wait()
+	var err error
+	if r.c != nil {
+		err = r.c.Wait()
+	}
 
 	defer r.p.debugf("pool released %d", r.port)