From c4d0f528b14cd022d2a360cee8f90c1c572b2ac4 Mon Sep 17 00:00:00 2001
From: Juan Linietsky <reduzio@gmail.com>
Date: Sat, 28 Apr 2018 08:53:27 -0300
Subject: Do not crash if the polygon is invalid

---
 modules/csg/csg_shape.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/modules/csg/csg_shape.cpp b/modules/csg/csg_shape.cpp
index 4da94c3baa..a8d0a1fb94 100644
--- a/modules/csg/csg_shape.cpp
+++ b/modules/csg/csg_shape.cpp
@@ -226,6 +226,9 @@ AABB CSGShape::get_aabb() const {
 PoolVector<Vector3> CSGShape::get_brush_faces() {
 	ERR_FAIL_COND_V(!is_inside_tree(), PoolVector<Vector3>());
 	CSGBrush *b = _get_brush();
+	if (!b) {
+		return PoolVector<Vector3>();
+	}
 
 	PoolVector<Vector3> faces;
 	int fc = b->faces.size();
-- 
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