From 34705fd8b2543d91384392ead3b31710e9329bf6 Mon Sep 17 00:00:00 2001
From: Jeff Young <jeff@rokeby.ie>
Date: Mon, 10 Aug 2020 14:39:43 +0100
Subject: [PATCH] More clone vs duplicate bugs.

Fixes https://gitlab.com/kicad/code/kicad/issues/5120
---
 pcbnew/tools/drawing_tool.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pcbnew/tools/drawing_tool.cpp b/pcbnew/tools/drawing_tool.cpp
index e0dba85de5..38684559a0 100644
--- a/pcbnew/tools/drawing_tool.cpp
+++ b/pcbnew/tools/drawing_tool.cpp
@@ -1893,7 +1893,10 @@ int DRAWING_TOOL::DrawVia( const TOOL_EVENT& aEvent )
                 if( viaPos != track->GetStart() && viaPos != track->GetEnd() )
                 {
                     aCommit.Modify( track );
+
                     TRACK* newTrack = dynamic_cast<TRACK*>( track->Clone() );
+                    const_cast<KIID&>( newTrack->m_Uuid ) = KIID();
+
                     track->SetEnd( viaPos );
                     newTrack->SetStart( viaPos );
                     aCommit.Add( newTrack );