From b84782e07f56b8b9b0e3c54a872ce685d487b018 Mon Sep 17 00:00:00 2001
From: Thomas Krijnen <t.krijnen@gmail.com>
Date: Fri, 3 Mar 2023 14:32:02 +0100
Subject: [PATCH] #2810 catch bad positioning warning and empty result

---
 src/ifcgeom_schema_agnostic/boolean_utils.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/ifcgeom_schema_agnostic/boolean_utils.cpp b/src/ifcgeom_schema_agnostic/boolean_utils.cpp
index fa77e7479a..8d93436a5c 100644
--- a/src/ifcgeom_schema_agnostic/boolean_utils.cpp
+++ b/src/ifcgeom_schema_agnostic/boolean_utils.cpp
@@ -1074,6 +1074,9 @@ bool IfcGeom::util::boolean_operation(const boolean_settings& settings, const To
 		if (builder->DSFiller()->HasWarning(STANDARD_TYPE(BOPAlgo_AlertAcquiredSelfIntersection))) {
 			Logger::Notice("Builder reports self-intersection in output");
 			success = false;
+		} else if(builder->DSFiller()->HasWarning(STANDARD_TYPE(BOPAlgo_AlertBadPositioning)) && !TopoDS_Iterator(*builder).More()) {
+			Logger::Notice("Builder reports bad positioning and result is empty");
+			success = false;
 		} else {
 			TopoDS_Shape r = *builder;