From f84654b2ae52007769b86936c006f049b4e67553 Mon Sep 17 00:00:00 2001
From: Fabien Castan <fabcastan@gmail.com>
Date: Wed, 21 Aug 2024 00:32:29 +0200
Subject: [PATCH] [ui] Graph.canExpandForLoop: fix corner case

---
 meshroom/ui/graph.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/meshroom/ui/graph.py b/meshroom/ui/graph.py
index 0183828c..8883f2cf 100644
--- a/meshroom/ui/graph.py
+++ b/meshroom/ui/graph.py
@@ -753,6 +753,8 @@ class UIGraph(QObject):
     def canExpandForLoop(self, currentEdge):
         """ Check if the list attribute can be expanded by looking at all the edges connected to it. """
         listAttribute = currentEdge.src.root
+        if not listAttribute:
+            return False
         srcIndex = listAttribute.index(currentEdge.src)
         allSrc = [e.src for e in self._graph.edges.values()]
         for i in range(len(listAttribute)):