From c782bf37db77a96ba2b4232ccd782cde96bf29cd Mon Sep 17 00:00:00 2001
From: Roman Telezhynskyi <kroluku@gmail.com>
Date: Wed, 19 Dec 2018 09:19:37 +0200
Subject: [PATCH] Fixed issue #909. Valentina produces wrong united path.
 (grafted from 6f13c33817dd37d3679398274e697e3da87dbbd0)

--HG--
branch : develop
---
 ChangeLog.txt                  |  1 +
 src/libs/vpatterndb/vpiece.cpp | 13 +++++++++++--
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/ChangeLog.txt b/ChangeLog.txt
index cff1677ad..1d701473b 100644
--- a/ChangeLog.txt
+++ b/ChangeLog.txt
@@ -7,6 +7,7 @@
 # Version 0.6.2 (unreleased)
 - [#903] Bug in tool Cut Spline path.
 - [#905] Valentina crashes with error: This id is not unique.
+- [#909] Valentina produces wrong united path.
 
 # Version 0.6.1 October 23, 2018
 - [#885] Regression. Broken support for multi size measurements.
diff --git a/src/libs/vpatterndb/vpiece.cpp b/src/libs/vpatterndb/vpiece.cpp
index 6b7b1a52b..b0bb1d024 100644
--- a/src/libs/vpatterndb/vpiece.cpp
+++ b/src/libs/vpatterndb/vpiece.cpp
@@ -938,8 +938,17 @@ QVector<VPieceNode> VPiece::GetUnitedPath(const VContainer *data) const
                 continue;
             }
 
-            const QVector<VPieceNode> midBefore = united.mid(0, indexStartPoint+1);
-            const QVector<VPieceNode> midAfter = united.mid(indexEndPoint, united.size() - midBefore.size());
+            QVector<VPieceNode> midBefore;
+            QVector<VPieceNode> midAfter;
+            if (indexStartPoint <= indexEndPoint)
+            {
+                midBefore = united.mid(0, indexStartPoint+1);
+                midAfter = united.mid(indexEndPoint, united.size() - midBefore.size());
+            }
+            else
+            {
+                midBefore = united.mid(indexEndPoint, indexStartPoint+1);
+            }
 
             QVector<VPieceNode> customNodes = data->GetPiecePath(records.at(i).path).GetNodes();
             if (records.at(i).reverse)