From 00fb54214619e62bb076d17150d89d05c3193ed6 Mon Sep 17 00:00:00 2001
From: Jeff Young <jeff@rokeby.ie>
Date: Fri, 20 Oct 2023 16:02:03 +0100
Subject: [PATCH] nullptr safety

Fixes https://gitlab.com/kicad/code/kicad/-/issues/15906
---
 pcbnew/generators/pcb_tuning_pattern.cpp | 19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)

diff --git a/pcbnew/generators/pcb_tuning_pattern.cpp b/pcbnew/generators/pcb_tuning_pattern.cpp
index fdffca8c11..0fa4646bf9 100644
--- a/pcbnew/generators/pcb_tuning_pattern.cpp
+++ b/pcbnew/generators/pcb_tuning_pattern.cpp
@@ -1753,16 +1753,19 @@ int DRAWING_TOOL::PlaceTuningPattern( const TOOL_EVENT& aEvent )
                 m_tuningPattern = PCB_TUNING_PATTERN::CreateNew( generatorTool, m_frame,
                                                                  m_pickerItem, mode );
 
-                int      dummyDist;
-                int      dummyClearance = std::numeric_limits<int>::max() / 2;
-                VECTOR2I closestPt;
+                if( m_tuningPattern )
+                {
+                    int      dummyDist;
+                    int      dummyClearance = std::numeric_limits<int>::max() / 2;
+                    VECTOR2I closestPt;
 
-                m_pickerItem->GetEffectiveShape()->Collide( cursorPos, dummyClearance,
-                                                            &dummyDist, &closestPt );
-                m_tuningPattern->SetPosition( closestPt );
-                m_tuningPattern->SetEnd( closestPt );
+                    m_pickerItem->GetEffectiveShape()->Collide( cursorPos, dummyClearance,
+                                                                &dummyDist, &closestPt );
+                    m_tuningPattern->SetPosition( closestPt );
+                    m_tuningPattern->SetEnd( closestPt );
 
-                m_preview.Add( m_tuningPattern );
+                    m_preview.Add( m_tuningPattern );
+                }
             }
             else if( m_pickerItem && m_tuningPattern )
             {