From bd143fefabee31efe15ea0357636b624b80a3e28 Mon Sep 17 00:00:00 2001
From: Haocheng Yu <98496194+haochey@users.noreply.github.com>
Date: Thu, 7 Nov 2024 10:59:15 -0500
Subject: [PATCH 1/2] Fix seg fault issue when fd_order is on

buff_size changed for idwbuff but not updated for startx, starty, and startz.
---
 src/simulation/m_global_parameters.fpp | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/simulation/m_global_parameters.fpp b/src/simulation/m_global_parameters.fpp
index dd5808ebb6..1cf3020354 100644
--- a/src/simulation/m_global_parameters.fpp
+++ b/src/simulation/m_global_parameters.fpp
@@ -1057,6 +1057,11 @@ contains
             buff_size = weno_polyn + 2
         end if
 
+        if (probe_wrt) then
+            fd_number = max(1, fd_order/2)
+            buff_size = buff_size + fd_number
+        end if
+
         ! Configuring Coordinate Direction Indexes =========================
         idwint(1)%beg = 0; idwint(2)%beg = 0; idwint(3)%beg = 0
         idwint(1)%end = m; idwint(2)%end = n; idwint(3)%end = p
@@ -1079,11 +1084,6 @@ contains
                 & idwbuff(3)%beg:idwbuff(3)%end))
         end if
 
-        if (probe_wrt) then
-            fd_number = max(1, fd_order/2)
-            buff_size = buff_size + fd_number
-        end if
-
         startx = -buff_size
         starty = 0
         startz = 0

From 6b33565a8857173f017343b9e02ef43b4e5fe949 Mon Sep 17 00:00:00 2001
From: Haocheng Yu <98496194+haochey@users.noreply.github.com>
Date: Thu, 7 Nov 2024 15:29:54 -0500
Subject: [PATCH 2/2] Update m_global_parameters.fpp

Assign finite difference number and keep the halo region the same.
---
 src/simulation/m_global_parameters.fpp | 1 -
 1 file changed, 1 deletion(-)

diff --git a/src/simulation/m_global_parameters.fpp b/src/simulation/m_global_parameters.fpp
index 08e59d41ac..6e6b20a88e 100644
--- a/src/simulation/m_global_parameters.fpp
+++ b/src/simulation/m_global_parameters.fpp
@@ -1070,7 +1070,6 @@ contains
 
         if (probe_wrt) then
             fd_number = max(1, fd_order/2)
-            buff_size = buff_size + fd_number
         end if
 
         ! Configuring Coordinate Direction Indexes =========================