From 4f64b658b0469bc1d5aefea7c9b352c9befb16c0 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] don't fail on null guid for rooted element deletion #2796

---
 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 27b8236b82..d9a9353dfc 100644
--- a/src/ifcparse/IfcParse.cpp
+++ b/src/ifcparse/IfcParse.cpp
@@ -2306,7 +2306,7 @@ 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()) {