From a73c60a467b29fe5a77d94496cc73571e218c7b7 Mon Sep 17 00:00:00 2001
From: Thomas Krijnen <t.krijnen@gmail.com>
Date: Fri, 29 Aug 2025 13:47:48 +0200
Subject: [PATCH] Initialize guid map in case of empty file creation

---
 src/ifcparse/IfcParse.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/ifcparse/IfcParse.cpp b/src/ifcparse/IfcParse.cpp
index a2cd9ba3de..e2362d6e13 100644
--- a/src/ifcparse/IfcParse.cpp
+++ b/src/ifcparse/IfcParse.cpp
@@ -1423,12 +1423,16 @@ IfcFile::IfcFile(const IfcParse::schema_definition* schema, filetype ty, const s
 
         byid_ = decltype(byid_)(&std::get<impl::in_memory_file_storage>(storage_).byid_);
         byref_excl_ = decltype(byref_excl_)(&std::get<impl::in_memory_file_storage>(storage_).byref_excl_);
+        byguid_ = decltype(byguid_)(&std::get<impl::in_memory_file_storage>(storage_).byguid_);
+
         // byidentity_ = decltype(byidentity_)(&std::get<impl::in_memory_file_storage>(storage_).byidentity_);
     } else if (ty == FT_ROCKSDB) {
         storage_.emplace<2>(path, this);
 
         byid_ = decltype(byid_)(&std::get<impl::rocks_db_file_storage>(storage_).instance_by_name_);
         byref_excl_ = decltype(byref_excl_)(&std::get<impl::rocks_db_file_storage>(storage_).byref_excl_);
+        byguid_ = decltype(byguid_)(&std::get<impl::rocks_db_file_storage>(storage_).byguid_);
+
         // byidentity_ = decltype(byidentity_)(&std::get<impl::rocks_db_file_storage>(storage_).instance_cache_);
     } else {
         throw std::runtime_error("Unsupported file format");