From 7dda18fed8087064db26c11e54e7a9beb1ad77fa Mon Sep 17 00:00:00 2001
From: "zhimin.zeng" <zhimin.zeng@bambulab.com>
Date: Wed, 7 Jun 2023 11:14:12 +0800
Subject: [PATCH] FIX: crash when loading stl file for modifier

Change-Id: If358e1a8bca908c2c4dda4a95510163867f56eb4
---
 src/slic3r/GUI/GUI_ObjectList.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/slic3r/GUI/GUI_ObjectList.cpp b/src/slic3r/GUI/GUI_ObjectList.cpp
index befeb085d..1749fd8fb 100644
--- a/src/slic3r/GUI/GUI_ObjectList.cpp
+++ b/src/slic3r/GUI/GUI_ObjectList.cpp
@@ -1990,6 +1990,7 @@ void ObjectList::load_modifier(const wxArrayString& input_files, ModelObject& mo
             }
         }
 
+        model.add_default_instances();
         TriangleMesh mesh = model.mesh();
         // Mesh will be centered when loading.
         ModelVolume* new_volume = model_object.add_volume(std::move(mesh), type);