Ensure a layer exists before using it.

Fixes #15170 https://gitlab.com/kicad/code/kicad/-/issues/15170
2 years ago · 74c5f5a054
1 changed files with 4 additions and 1 deletions
--- a/pcbnew/pcb_painter.cpp
+++ b/pcbnew/pcb_painter.cpp
@ -248,7 +248,10 @@ COLOR4D PCB_RENDER_SETTINGS::GetColor( const VIEW_ITEM* aItem, int aLayer ) cons
            else if( GetActiveLayer() == B_Mask && visibleLayers.test( B_Mask ) )
                aLayer = B_Mask;
            else if( ( visibleLayers & LSET::AllCuMask() ).none() )
-                aLayer = visibleLayers.Seq().back();
+            {
+                if( visibleLayers.any() )
+                    aLayer = visibleLayers.Seq().back();
+            }
        }
    }