From eea1c9abd5c0490421a6197a9ae53b92651d9c67 Mon Sep 17 00:00:00 2001
From: Ian Chen <ichen@openrobotics.org>
Date: Tue, 12 Nov 2024 03:29:32 -0800
Subject: [PATCH] check valid pointer (#2674)

Signed-off-by: Ian Chen <ichen@openrobotics.org>
(cherry picked from commit 57599fb184090e11ed0cf58628a0327bb67a9f8d)
---
 src/systems/optical_tactile_plugin/OpticalTactilePlugin.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/systems/optical_tactile_plugin/OpticalTactilePlugin.cc b/src/systems/optical_tactile_plugin/OpticalTactilePlugin.cc
index c58740d1e1..b787444fa5 100644
--- a/src/systems/optical_tactile_plugin/OpticalTactilePlugin.cc
+++ b/src/systems/optical_tactile_plugin/OpticalTactilePlugin.cc
@@ -630,7 +630,7 @@ void OpticalTactilePluginPrivate::Enable(const gz::msgs::Boolean &_req)
 
   this->enabled = _req.data();
 
-  if (!_req.data())
+  if (!_req.data() && this->visualizePtr)
   {
     this->visualizePtr->RemoveNormalForcesAndContactsMarkers();
   }