From 5dabcbb944b602a0c5889245b8fefec115fa186e Mon Sep 17 00:00:00 2001
From: Thomas Krijnen <t.krijnen@gmail.com>
Date: Thu, 22 Jun 2023 10:30:42 +0200
Subject: [PATCH] #2805 Use dynamic cast for generalize() due to virtual
 inheritance of selects

---
 src/ifcparse/aggregate_of_instance.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/ifcparse/aggregate_of_instance.h b/src/ifcparse/aggregate_of_instance.h
index db09a2bb44..f304e67351 100644
--- a/src/ifcparse/aggregate_of_instance.h
+++ b/src/ifcparse/aggregate_of_instance.h
@@ -67,7 +67,7 @@ public:
 	unsigned int size() const { return (unsigned int)ls.size(); }
 	aggregate_of_instance::ptr generalize() {
 		aggregate_of_instance::ptr r(new aggregate_of_instance());
-		for (it i = begin(); i != end(); ++i) r->push(*i);
+		for (it i = begin(); i != end(); ++i) r->push((*i)->as<IfcUtil::IfcBaseClass>());
 		return r;
 	}
 	bool contains(T* t) const { return std::find(ls.begin(), ls.end(), t) != ls.end(); }