From b21632602fd9842c348ffb98a09810fa1c5355c9 Mon Sep 17 00:00:00 2001
From: Nyall Dawson <nyall.dawson@gmail.com>
Date: Mon, 21 May 2018 15:14:28 +1000
Subject: [PATCH] [processing] Fix exception when editing enum input with no
 default value

---
 python/plugins/processing/gui/enummodelerwidget.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/python/plugins/processing/gui/enummodelerwidget.py b/python/plugins/processing/gui/enummodelerwidget.py
index c87412653de..5bfd9c30de0 100644
--- a/python/plugins/processing/gui/enummodelerwidget.py
+++ b/python/plugins/processing/gui/enummodelerwidget.py
@@ -135,6 +135,8 @@ class EnumModelerWidget(BASE, WIDGET):
             model.appendRow(item)
 
     def setDefault(self, indexes):
+        if indexes is None:
+            return
         model = self.lstItems.model()
         if not isinstance(indexes, (list, tuple)):
             indexes = [indexes]