From a27ba65ed2af72d0bb6a3032ac87b0921634312e Mon Sep 17 00:00:00 2001
From: jean-pierre charras <jp.charras@wanadoo.fr>
Date: Mon, 23 Jul 2018 13:56:30 +0200
Subject: [PATCH] DXF import: verify the layer used to import the DXF drawings
 is valid (correctly selected).

---
 pcbnew/import_dxf/dialog_dxf_import.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/pcbnew/import_dxf/dialog_dxf_import.cpp b/pcbnew/import_dxf/dialog_dxf_import.cpp
index c46458aa39..66164ab442 100644
--- a/pcbnew/import_dxf/dialog_dxf_import.cpp
+++ b/pcbnew/import_dxf/dialog_dxf_import.cpp
@@ -293,6 +293,13 @@ bool DIALOG_DXF_IMPORT::TransferDataFromWindow()
     // Set coordinates offset for import (offset is given in mm)
     m_dxfImporter.SetOffset( offsetX, offsetY );
     m_layer = m_SelLayerBox->GetLayerSelection();
+
+    if( m_layer < 0 )
+    {
+        wxMessageBox( _( "Please, select a valid layer " ) );
+        return false;
+    }
+
     m_dxfImporter.SetBrdLayer( m_layer );
     m_PCBdefaultLineWidth = getPCBdefaultLineWidthMM();
     m_dxfImporter.SetDefaultLineWidthMM( m_PCBdefaultLineWidth );