From b3ee2c6511c68d7f14b6fd869ecaa38595727396 Mon Sep 17 00:00:00 2001
From: Thomas Krijnen <t.krijnen@gmail.com>
Date: Wed, 30 Sep 2020 13:53:46 +0200
Subject: [PATCH] fail on empty poly

---
 src/ifcgeom/kernels/cgal/CgalKernel.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/ifcgeom/kernels/cgal/CgalKernel.cpp b/src/ifcgeom/kernels/cgal/CgalKernel.cpp
index d61d2b7aa9..79500544c5 100644
--- a/src/ifcgeom/kernels/cgal/CgalKernel.cpp
+++ b/src/ifcgeom/kernels/cgal/CgalKernel.cpp
@@ -759,6 +759,9 @@ bool CgalKernel::convert_impl(const taxonomy::shell *shell, ifcopenshell::geomet
 	if (!convert(shell, shape)) {
 		return false;
 	}
+	if (shape.size_of_facets() == 0) {
+		return false;
+	}
 	results.emplace_back(ConversionResult(
 		shell->instance->data().id(),
 		shell->matrix,