From a1c7ebe1c37c8dbabe4719209f63235119917d5c Mon Sep 17 00:00:00 2001
From: Kostas Karmas <konskarm@gmail.com>
Date: Thu, 5 Nov 2020 19:04:29 +0100
Subject: [PATCH] Fix mypy complaints

CURA-7827
---
 cura/Settings/MachineManager.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/cura/Settings/MachineManager.py b/cura/Settings/MachineManager.py
index 8a38836ac4..e363895e08 100755
--- a/cura/Settings/MachineManager.py
+++ b/cura/Settings/MachineManager.py
@@ -861,6 +861,9 @@ class MachineManager(QObject):
     def _correctPrintSequence(self) -> None:
         """Resets the Print Sequence setting when there are more than one enabled extruders."""
 
+        if self._global_container_stack is None:
+            return
+
         setting_key = "print_sequence"
         new_value = "all_at_once"
         user_changes_container = self._global_container_stack.userChanges