From 788c607d4793a1e9b90b67f88e54c121c0e3ea18 Mon Sep 17 00:00:00 2001
From: jean-pierre charras <jp.charras@wanadoo.fr>
Date: Wed, 2 Feb 2022 20:40:54 +0100
Subject: [PATCH] EDA_SHAPE::MakeEffectiveShapes(): protect against empty
 polygons. Fixes #10713 https://gitlab.com/kicad/code/kicad/issues/10713

---
 common/eda_shape.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/common/eda_shape.cpp b/common/eda_shape.cpp
index 33511dac43..53a51bce81 100644
--- a/common/eda_shape.cpp
+++ b/common/eda_shape.cpp
@@ -1140,6 +1140,9 @@ std::vector<SHAPE*> EDA_SHAPE::MakeEffectiveShapes() const
 
     case SHAPE_T::POLY:
     {
+        if( GetPolyShape().OutlineCount() == 0 )    // malformed/empty polygon
+            break;
+
         SHAPE_LINE_CHAIN l = GetPolyShape().COutline( 0 );
 
         l.Rotate( -DECIDEG2RAD( getParentOrientation() ) );