From 36a9cdaccd7f183b82962f3a4b161cd28df0e0a5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Cl=C3=A9ment=20Fauconnier?= <fc86@outlook.fr>
Date: Wed, 24 Feb 2021 12:29:42 +0100
Subject: [PATCH] prevent segfault if strokesgroup is null

---
 src/domain/UBGraphicsScene.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/domain/UBGraphicsScene.cpp b/src/domain/UBGraphicsScene.cpp
index a2a654a5..44b14418 100644
--- a/src/domain/UBGraphicsScene.cpp
+++ b/src/domain/UBGraphicsScene.cpp
@@ -1050,8 +1050,11 @@ void UBGraphicsScene::eraseLineTo(const QPointF &pEndPoint, const qreal &pWidth)
                 intersectedPolygonItem->copyItemParameters(polygonItem);
                 polygonItem->setNominalLine(false);
                 polygonItem->setStroke(intersectedPolygonItem->stroke());
-                polygonItem->setStrokesGroup(intersectedPolygonItem->strokesGroup());
-                intersectedPolygonItem->strokesGroup()->addToGroup(polygonItem);
+                if (intersectedPolygonItem->strokesGroup())
+                {
+                    polygonItem->setStrokesGroup(intersectedPolygonItem->strokesGroup());
+                    intersectedPolygonItem->strokesGroup()->addToGroup(polygonItem);
+                }
                 mAddedItems << polygonItem;
             }
         }