From b9746ec6776fbfb497a9a612a66c35fa4b4d61ff Mon Sep 17 00:00:00 2001
From: Israel Lot <israel.lot@gmail.com>
Date: Tue, 12 Mar 2019 18:11:12 -0500
Subject: [PATCH] Don't call sdscmp() with shared.maxstring or shared.minstring

---
 src/t_zset.c | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/src/t_zset.c b/src/t_zset.c
index cc6e440e..a5d82d90 100644
--- a/src/t_zset.c
+++ b/src/t_zset.c
@@ -523,12 +523,12 @@ int zslParseLexRangeItem(robj *item, sds *dest, int *ex) {
     switch(c[0]) {
     case '+':
         if (c[1] != '\0') return C_ERR;
-        *ex = 0;
+        *ex = 1;
         *dest = shared.maxstring;
         return C_OK;
     case '-':
         if (c[1] != '\0') return C_ERR;
-        *ex = 0;
+        *ex = 1;
         *dest = shared.minstring;
         return C_OK;
     case '(':
@@ -601,9 +601,8 @@ int zslIsInLexRange(zskiplist *zsl, zlexrangespec *range) {
     zskiplistNode *x;
 
     /* Test for ranges that will always be empty. */
-    if (sdscmplex(range->min,range->max) > 1 ||
-            (sdscmp(range->min,range->max) == 0 &&
-            (range->minex || range->maxex)))
+	int cmp = sdscmplex(range->min,range->max);
+	if (cmp > 0 || (cmp == 0 && (range->minex || range->maxex)))
         return 0;
     x = zsl->tail;
     if (x == NULL || !zslLexValueGteMin(x->ele,range))
@@ -876,9 +875,8 @@ int zzlIsInLexRange(unsigned char *zl, zlexrangespec *range) {
     unsigned char *p;
 
     /* Test for ranges that will always be empty. */
-    if (sdscmplex(range->min,range->max) > 1 ||
-            (sdscmp(range->min,range->max) == 0 &&
-            (range->minex || range->maxex)))
+	int cmp = sdscmplex(range->min,range->max);
+	if (cmp > 0 || (cmp == 0 && (range->minex || range->maxex)))
         return 0;
 
     p = ziplistIndex(zl,-2); /* Last element. */