From 77e0d9cca7c44b9b3723cfb03fe77cb82c5c8eee Mon Sep 17 00:00:00 2001
From: Thomas Krijnen <t.krijnen@gmail.com>
Date: Wed, 21 Mar 2018 17:29:37 +0100
Subject: [PATCH] Freeing of lazily loaded inst attrs

---
 src/ifcparse/IfcParse.cpp | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/ifcparse/IfcParse.cpp b/src/ifcparse/IfcParse.cpp
index 1f2030535b..831bbef2ef 100644
--- a/src/ifcparse/IfcParse.cpp
+++ b/src/ifcparse/IfcParse.cpp
@@ -969,10 +969,12 @@ std::string IfcEntityInstanceData::toString(bool upper) const {
 }
 
 IfcEntityInstanceData::~IfcEntityInstanceData() {
-	for (size_t i = 0; i < getArgumentCount(); ++i) {
-		delete attributes_[i];
+	if (attributes_ != NULL) {
+		for (size_t i = 0; i < getArgumentCount(); ++i) {
+			delete attributes_[i];
+		}
+		delete[] attributes_;
 	}
-	delete[] attributes_;
 }
 
 unsigned IfcEntityInstanceData::set_id(boost::optional<unsigned> i) {