From c6e49af3fef901424e0cadb1ddca598ae8286d39 Mon Sep 17 00:00:00 2001
From: tao wang <tao.wang@bambulab.com>
Date: Thu, 16 Mar 2023 12:06:53 +0800
Subject: [PATCH] ENH:add some protection for fan control

Change-Id: Ic60deaec60b5238f9307b7b4bb928293701c2fd5
---
 src/slic3r/GUI/Widgets/FanControl.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/slic3r/GUI/Widgets/FanControl.cpp b/src/slic3r/GUI/Widgets/FanControl.cpp
index da0a414b2..57f4217ff 100644
--- a/src/slic3r/GUI/Widgets/FanControl.cpp
+++ b/src/slic3r/GUI/Widgets/FanControl.cpp
@@ -394,7 +394,7 @@ void FanControl::command_control_fan()
 {
     if (m_current_speed < 0 || m_current_speed > 10) { return; }
     int speed = floor(m_current_speed * float(25.5));
-    if (m_update_already) {
+    if (m_update_already && m_obj) {
         m_obj->command_control_fan_val(m_type, speed);
         post_event(wxCommandEvent(EVT_FAN_CHANGED));
     }