From 7168f8eeffc0f36155e10e10e05dcfd85a73f299 Mon Sep 17 00:00:00 2001
From: Thomas Krijnen <t.krijnen@gmail.com>
Date: Fri, 1 Dec 2023 15:49:31 +0100
Subject: [PATCH] #2796 don't fail on null guid for rooted element deletion

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

diff --git a/src/ifcparse/IfcParse.cpp b/src/ifcparse/IfcParse.cpp
index c1e2895b7c..d0ccb44aa6 100644
--- a/src/ifcparse/IfcParse.cpp
+++ b/src/ifcparse/IfcParse.cpp
@@ -2240,7 +2240,7 @@ void IfcFile::process_deletion_() {
 			}
 		}
 
-		if (entity->declaration().is(*ifcroot_type_)) {
+		if (entity->declaration().is(*ifcroot_type_) && !entity->data().getArgument(0)->isNull()) {
 			const std::string global_id = *entity->data().getArgument(0);
 			auto it = byguid.find(global_id);
 			if (it != byguid.end()) {