From d0773cbe89764f610bfac5a00896e6511912bd19 Mon Sep 17 00:00:00 2001
From: Jeff Young <jeff@rokeby.ie>
Date: Tue, 29 Sep 2020 14:08:10 +0100
Subject: [PATCH] Be more careful with iterators when deleting.

Fixes https://gitlab.com/kicad/code/kicad/issues/5811
---
 pcbnew/zone_filler.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pcbnew/zone_filler.cpp b/pcbnew/zone_filler.cpp
index fa5356e522..f443e1fd10 100644
--- a/pcbnew/zone_filler.cpp
+++ b/pcbnew/zone_filler.cpp
@@ -372,7 +372,7 @@ bool ZONE_FILLER::Fill( std::vector<ZONE_CONTAINER*>& aZones, bool aCheck, wxWin
 
             SHAPE_POLY_SET poly = zone->GetFilledPolysList( layer );
 
-            for( int ii = 0; ii < poly.OutlineCount(); ii++ )
+            for( int ii = poly.OutlineCount() - 1; ii >= 0; ii-- )
             {
                 std::vector<SHAPE_LINE_CHAIN>& island = poly.Polygon( ii );