From 140e4cbe28b4fdeaf86bf4737645fc33ce79e46b Mon Sep 17 00:00:00 2001
From: Seth Hillbrand <seth@kipro-pcb.com>
Date: Wed, 22 Sep 2021 12:37:17 -0700
Subject: [PATCH] Avoid assertion on 2-layer board

New boards may have INVALID_LAYER inbetween F_Cu and B_Cu in the
stackup.  Skip these and any layer values beyond what we store currently
---
 pcbnew/tools/drawing_stackup_table_tool.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pcbnew/tools/drawing_stackup_table_tool.cpp b/pcbnew/tools/drawing_stackup_table_tool.cpp
index e1c3551f18..a488609645 100644
--- a/pcbnew/tools/drawing_stackup_table_tool.cpp
+++ b/pcbnew/tools/drawing_stackup_table_tool.cpp
@@ -295,6 +295,9 @@ std::vector<BOARD_ITEM*> DRAWING_TOOL::DrawSpecificationStackup( const wxPoint&
 
     for( i = 0; i < stackup.GetCount(); i++ )
     {
+        if( !IsValidLayer( layers.at( i )->GetBrdLayerId() ) )
+            continue;
+
         for( j = 0; j < layers.at( i )->GetSublayersCount(); j++ )
         {
             // Layer names are empty until we close at least once the board setup dialog.