From cf5c42889d64c3bfb13d8a61e8e834eb10dbc16c Mon Sep 17 00:00:00 2001
From: Axel Kohlmeyer <akohlmey@gmail.com>
Date: Fri, 15 Nov 2024 13:01:23 -0500
Subject: [PATCH] avoid dereferencing reaxff object when no reaxff pair style
 in use

---
 src/REAXFF/fix_qeq_reaxff.cpp   | 2 +-
 src/REAXFF/fix_qtpie_reaxff.cpp | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/REAXFF/fix_qeq_reaxff.cpp b/src/REAXFF/fix_qeq_reaxff.cpp
index 067272f0f7..dc8fbd5afd 100644
--- a/src/REAXFF/fix_qeq_reaxff.cpp
+++ b/src/REAXFF/fix_qeq_reaxff.cpp
@@ -344,7 +344,7 @@ void FixQEqReaxFF::allocate_matrix()
   int mincap;
   double safezone;
 
-  if (reaxflag) {
+  if (reaxflag && reaxff) {
     mincap = reaxff->api->system->mincap;
     safezone = reaxff->api->system->safezone;
   } else {
diff --git a/src/REAXFF/fix_qtpie_reaxff.cpp b/src/REAXFF/fix_qtpie_reaxff.cpp
index 48c1109178..5acdea0482 100644
--- a/src/REAXFF/fix_qtpie_reaxff.cpp
+++ b/src/REAXFF/fix_qtpie_reaxff.cpp
@@ -370,7 +370,7 @@ void FixQtpieReaxFF::allocate_matrix()
   int mincap;
   double safezone;
 
-  if (reaxflag) {
+  if (reaxflag && reaxff) {
     mincap = reaxff->api->system->mincap;
     safezone = reaxff->api->system->safezone;
   } else {