From 75ffc4454db46401dc885c6487aa1a6938d06a75 Mon Sep 17 00:00:00 2001
From: Thomas Krijnen <t.krijnen@gmail.com>
Date: Thu, 25 Nov 2021 12:05:39 +0100
Subject: [PATCH] #1895 don't signal element ready when result is empty

---
 src/ifcgeom/IfcGeomIteratorImplementation.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/ifcgeom/IfcGeomIteratorImplementation.h b/src/ifcgeom/IfcGeomIteratorImplementation.h
index af6dbf9225..6e06cc275c 100644
--- a/src/ifcgeom/IfcGeomIteratorImplementation.h
+++ b/src/ifcgeom/IfcGeomIteratorImplementation.h
@@ -288,6 +288,10 @@ namespace IfcGeom {
 		size_t processed_ = 0;
 
 		void process_finished_rep(geometry_conversion_task* rep) {
+			if (rep->elements.empty()) {
+				return;
+			}
+
 			std::lock_guard<std::mutex> lk(element_ready_mutex_);
 
 			all_processed_elements_.insert(all_processed_elements_.end(), rep->elements.begin(), rep->elements.end());