From f8818e5b75237e6a8ee715bd4c215de5691a5714 Mon Sep 17 00:00:00 2001
From: yihaoDeng <luomoxyz@126.com>
Date: Thu, 16 Jul 2020 19:33:26 +0000
Subject: [PATCH] coverity issue

---
 src/util/src/tutil.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/util/src/tutil.c b/src/util/src/tutil.c
index c8df34e1cd..3764df4afc 100644
--- a/src/util/src/tutil.c
+++ b/src/util/src/tutil.c
@@ -239,7 +239,10 @@ char* strntolower(char *dst, const char *src, int32_t n) {
   char quote = 0, *p = dst, c;
 
   assert(dst != NULL);
-
+  if (n == 0) {
+    *p = 0;
+    return dst;
+  } 
   for (c = *src++; n-- > 0; c = *src++) {
     if (esc) {
       esc = 0;
-- 
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