From 2df691b9faa376f8f656ce31150ee6919c387737 Mon Sep 17 00:00:00 2001
From: tao wang <tao.wang@bambulab.com>
Date: Wed, 21 Feb 2024 11:02:02 +0800
Subject: [PATCH] FIX:fixed crash when selecting new printer

jira:[fix]

Change-Id: I6a81186e822eb6bf6ce7aa70561dfae35d4de0e7
---
 src/slic3r/GUI/Monitor.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/slic3r/GUI/Monitor.cpp b/src/slic3r/GUI/Monitor.cpp
index 122844e1d..8a365cf1b 100644
--- a/src/slic3r/GUI/Monitor.cpp
+++ b/src/slic3r/GUI/Monitor.cpp
@@ -302,7 +302,7 @@ void MonitorPanel::on_update_all(wxMouseEvent &event)
     Slic3r::DeviceManager* dev = Slic3r::GUI::wxGetApp().getDeviceManager();
     if (!dev) return;
 
-    if ( (dev->get_selected_machine()->dev_id != event.GetString().ToStdString()) && m_hms_panel) {
+    if ( dev->get_selected_machine() && (dev->get_selected_machine()->dev_id != event.GetString().ToStdString()) && m_hms_panel) {
         m_hms_panel->clear_hms_tag();
     }