From a14c40feda20c9cd645f1e084e0174e6c996a091 Mon Sep 17 00:00:00 2001
From: Thomas Krijnen <t.krijnen@gmail.com>
Date: Sat, 16 Sep 2023 22:23:22 +0200
Subject: [PATCH] Check for empty result from map(IfcRepresentation) in
 iterator

---
 src/ifcgeom/Iterator.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/ifcgeom/Iterator.h b/src/ifcgeom/Iterator.h
index 83e10e1065..abeb98d24d 100644
--- a/src/ifcgeom/Iterator.h
+++ b/src/ifcgeom/Iterator.h
@@ -178,6 +178,9 @@ namespace IfcGeom {
 			for (auto& task : reps) {
 				geometry_conversion_result res;
 				res.item = converter_->mapping()->map(task.representation);
+				if (!res.item) {
+					continue;
+				}
 				std::transform(task.products->begin(), task.products->end(), std::back_inserter(res.products), [this, &res](IfcUtil::IfcBaseClass* prod) {
 					auto prod_item = converter_->mapping()->map(prod);
 					return std::make_pair(prod->as<IfcUtil::IfcBaseEntity>(), taxonomy::cast<taxonomy::geom_item>(prod_item)->matrix);