From 0d794b20bb5c308183cbd339be7a3dcf8a896d03 Mon Sep 17 00:00:00 2001
From: Jon Evans <jon@craftyjon.com>
Date: Mon, 26 Feb 2018 22:15:58 -0500
Subject: [PATCH] Add null check in ROUTER_TOOL::breakTrack()

---
 pcbnew/router/router_tool.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/pcbnew/router/router_tool.cpp b/pcbnew/router/router_tool.cpp
index 6e94f39d2a..abf4622f8a 100644
--- a/pcbnew/router/router_tool.cpp
+++ b/pcbnew/router/router_tool.cpp
@@ -840,14 +840,16 @@ int ROUTER_TOOL::RouteDiffPair( const TOOL_EVENT& aEvent )
     return mainLoop( PNS::PNS_MODE_ROUTE_DIFF_PAIR );
 }
 
+
 void ROUTER_TOOL::breakTrack()
 {
-    if ( m_startItem->OfKind( PNS::ITEM::SEGMENT_T ) )
+    if( m_startItem && m_startItem->OfKind( PNS::ITEM::SEGMENT_T ) )
     {
         m_router->BreakSegment( m_startItem, m_startSnapPoint );
     }
 }
 
+
 int ROUTER_TOOL::mainLoop( PNS::ROUTER_MODE aMode )
 {
     PCB_EDIT_FRAME* frame = getEditFrame<PCB_EDIT_FRAME>();