From 2297a6e80ba9345b1a6426ffc7bcae8f92e61cf2 Mon Sep 17 00:00:00 2001
From: Jaime van Kessel <nallath@gmail.com>
Date: Mon, 24 Apr 2017 13:05:39 +0200
Subject: [PATCH] Fixed inhertiance manager crashing if there is no parent

---
 cura/Settings/SettingInheritanceManager.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/cura/Settings/SettingInheritanceManager.py b/cura/Settings/SettingInheritanceManager.py
index 2f81526813..49cf5c7c83 100644
--- a/cura/Settings/SettingInheritanceManager.py
+++ b/cura/Settings/SettingInheritanceManager.py
@@ -109,8 +109,11 @@ class SettingInheritanceManager(QObject):
                 self._settings_with_inheritance_warning.remove(key)
                 settings_with_inheritance_warning_changed = True
 
-            # Find the topmost parent (Assumed to be a category)
             parent = definitions[0].parent
+            if parent is None:
+                return
+            
+            # Find the topmost parent (Assumed to be a category)
             while parent.parent is not None:
                 parent = parent.parent