From 7659619824755b929251faff457d3873b9742f2b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=90=83=E7=8A=B6=E9=97=AA=E7=94=B5?= <zwkno1@gmail.com>
Date: Tue, 12 Jun 2018 15:28:28 +0800
Subject: [PATCH 1/3] Update geohash.c

fix geohasEncode bug when step > 31
---
 src/geohash.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/geohash.c b/src/geohash.c
index 1ae7a7e0..b40282e7 100644
--- a/src/geohash.c
+++ b/src/geohash.c
@@ -144,8 +144,8 @@ int geohashEncode(const GeoHashRange *long_range, const GeoHashRange *lat_range,
         (longitude - long_range->min) / (long_range->max - long_range->min);
 
     /* convert to fixed point based on the step size */
-    lat_offset *= (1 << step);
-    long_offset *= (1 << step);
+    lat_offset *= (1ULL << step);
+    long_offset *= (1ULL << step);
     hash->bits = interleave64(lat_offset, long_offset);
     return 1;
 }

From 963002d71e64ffd1491b398eea3f57a34d928464 Mon Sep 17 00:00:00 2001
From: "zhaozhao.zz" <zhaozhao.zz@alibaba-inc.com>
Date: Wed, 13 Jun 2018 20:35:40 +0800
Subject: [PATCH 2/3] optimize reply list memory usage

---
 src/networking.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/networking.c b/src/networking.c
index 00558974..02e77307 100644
--- a/src/networking.c
+++ b/src/networking.c
@@ -247,7 +247,7 @@ void _addReplyStringToList(client *c, const char *s, size_t len) {
 
         /* Append to this object when possible. If tail == NULL it was
          * set via addDeferredMultiBulkLength(). */
-        if (tail && sdslen(tail)+len <= PROTO_REPLY_CHUNK_BYTES) {
+        if (tail && (sdsavail(tail) >= len || sdslen(tail)+len <= PROTO_REPLY_CHUNK_BYTES)) {
             tail = sdscatlen(tail,s,len);
             listNodeValue(ln) = tail;
             c->reply_bytes += len;

From 2ffa533f8556b3c642b1099b98ba8b59889b1250 Mon Sep 17 00:00:00 2001
From: "zhaozhao.zz" <zhaozhao.zz@alibaba-inc.com>
Date: Thu, 14 Jun 2018 01:30:07 +0800
Subject: [PATCH 3/3] fix exists command on slave

---
 src/db.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/db.c b/src/db.c
index 16928aa0..3307cdee 100644
--- a/src/db.c
+++ b/src/db.c
@@ -467,8 +467,7 @@ void existsCommand(client *c) {
     int j;
 
     for (j = 1; j < c->argc; j++) {
-        expireIfNeeded(c->db,c->argv[j]);
-        if (dbExists(c->db,c->argv[j])) count++;
+        if (lookupKeyRead(c->db,c->argv[j])) count++;
     }
     addReplyLongLong(c,count);
 }