From 1e680c7a8b9fc264adb60b6dc11b65eb5dbdb312 Mon Sep 17 00:00:00 2001
From: John <john@johng.cn>
Date: Fri, 14 Jun 2019 10:44:56 +0800
Subject: [PATCH] fix issue in gcache

---
 g/os/gcache/gcache_mem_cache.go | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/g/os/gcache/gcache_mem_cache.go b/g/os/gcache/gcache_mem_cache.go
index 3de2d5071..f46461898 100644
--- a/g/os/gcache/gcache_mem_cache.go
+++ b/g/os/gcache/gcache_mem_cache.go
@@ -91,8 +91,13 @@ func (c *memCache) getExpireSet(expire int64) (expireSet *gset.Set) {
 // It creates and returns a new set for <expire> if it does not exist.
 func (c *memCache) getOrNewExpireSet(expire int64) (expireSet *gset.Set) {
     if expireSet = c.getExpireSet(expire); expireSet == nil {
-        c.expireSetMu.Lock()
-	    c.expireSets[expire] = gset.New()
+	    expireSet = gset.New()
+	    c.expireSetMu.Lock()
+	    if es, ok := c.expireSets[expire]; ok {
+		    expireSet = es
+	    } else {
+		    c.expireSets[expire] = expireSet
+	    }
         c.expireSetMu.Unlock()
     }
     return