From 3d0c9378c12c3db437cb0910e417b273388a8471 Mon Sep 17 00:00:00 2001
From: Thomas Krijnen <t.krijnen@gmail.com>
Date: Sat, 9 Jan 2021 11:49:30 +0100
Subject: [PATCH] Quickfix #1246

---
 src/ifcparse/IfcParse.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/ifcparse/IfcParse.cpp b/src/ifcparse/IfcParse.cpp
index 9cc4976d6e..2769dbcf61 100644
--- a/src/ifcparse/IfcParse.cpp
+++ b/src/ifcparse/IfcParse.cpp
@@ -1866,7 +1866,12 @@ void IfcFile::removeEntity(IfcUtil::IfcBaseClass* entity) {
 
 	if (entity->declaration().is(*ifcroot_type_)) {
 		const std::string global_id = *entity->data().getArgument(0);
-		byguid.erase(byguid.find(global_id));
+		auto it = byguid.find(global_id);
+		if (it != byguid.end()) {
+			byguid.erase(it);
+		} else {
+			Logger::Warning("GlobalId on rooted instance not encountered in map");
+		}
 	}
 	
 	byid.erase(byid.find(id));