From d51e841de09d234a64d0dfadd2305596979559da Mon Sep 17 00:00:00 2001
From: Tao Wen <taowen@gmail.com>
Date: Wed, 28 Feb 2018 20:29:23 +0800
Subject: [PATCH] fix build on 1.8

---
 config.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/config.go b/config.go
index b69cdbf..4bdb820 100644
--- a/config.go
+++ b/config.go
@@ -104,7 +104,7 @@ func (cfg *frozenConfig) getEncoderFromCache(cacheKey uintptr) ValEncoder {
 	return nil
 }
 
-var cfgCache = &sync.Map{}
+var cfgCache = concurrent.NewMap()
 
 func getFrozenConfigFromCache(cfg Config) *frozenConfig {
 	obj, found := cfgCache.Load(cfg)