From d658d918d764899b01b9bbb3a4fc11c771185e66 Mon Sep 17 00:00:00 2001
From: YuSanka <yusanka@gmail.com>
Date: Mon, 19 Nov 2018 14:01:14 +0100
Subject: [PATCH] Fixed crashing when project with modifier is imported

---
 src/slic3r/GUI/GUI_ObjectList.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/slic3r/GUI/GUI_ObjectList.cpp b/src/slic3r/GUI/GUI_ObjectList.cpp
index 25aaf16f2..0d70a7ae5 100644
--- a/src/slic3r/GUI/GUI_ObjectList.cpp
+++ b/src/slic3r/GUI/GUI_ObjectList.cpp
@@ -1123,7 +1123,8 @@ void ObjectList::add_object_to_list(size_t obj_idx)
             m_objects_model->AddVolumeChild(item,
             model_object->volumes[id]->name,
             ModelVolume::MODEL_PART,
-            model_object->volumes[id]->config.option<ConfigOptionInt>("extruder")->value,
+            !model_object->volumes[id]->config.has("extruder") ? 0 :
+                model_object->volumes[id]->config.option<ConfigOptionInt>("extruder")->value,
             false);
         Expand(item);
     }