From 4c64a2f2a1b1caab0e482041da316cb74f7c9cd4 Mon Sep 17 00:00:00 2001
From: Axel Kohlmeyer <akohlmey@gmail.com>
Date: Tue, 30 Aug 2022 14:27:28 -0400
Subject: [PATCH] fix out-of-range memory access in sort function

---
 src/MESONT/pair_mesocnt.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/MESONT/pair_mesocnt.cpp b/src/MESONT/pair_mesocnt.cpp
index f6b4dc5592..4da33ccbd1 100644
--- a/src/MESONT/pair_mesocnt.cpp
+++ b/src/MESONT/pair_mesocnt.cpp
@@ -1424,10 +1424,11 @@ void PairMesoCNT::sort(int *list, int size)
     j = i;
     temp1 = list[j - 1];
     temp2 = list[j];
-    while (j > 0 && tag[temp1] > tag[temp2]) {
+    while (tag[temp1] > tag[temp2]) {
       list[j] = temp1;
       list[j - 1] = temp2;
       j--;
+      if (j == 0) break;
       temp1 = list[j - 1];
       temp2 = list[j];
     }