From e0157cbf724d6bd07e4df512fc537028cd682968 Mon Sep 17 00:00:00 2001
From: Denisi Murataj <dmurataj01@gmail.com>
Date: Mon, 23 May 2022 16:43:55 +0100
Subject: [PATCH] containers: fix undefined behaviour when flatVector2D is
 empty but has items

---
 src/containers/flatVector2D.tpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/containers/flatVector2D.tpp b/src/containers/flatVector2D.tpp
index 3e28c9b13f..34f5a97e59 100644
--- a/src/containers/flatVector2D.tpp
+++ b/src/containers/flatVector2D.tpp
@@ -1091,6 +1091,10 @@ const T* FlatVector2D<T>::operator[](std::size_t i) const
 {
     assert(isIndexValid(i));
 
+    if (m_v.empty()) {
+        return nullptr;
+    }
+
     std::size_t index = m_index[i];
     return &m_v[index];
 }
@@ -1106,6 +1110,10 @@ T* FlatVector2D<T>::operator[](std::size_t i)
 {
     assert(isIndexValid(i));
 
+    if (m_v.empty()) {
+        return nullptr;
+    }
+
     std::size_t index = m_index[i];
     return &m_v[index];
 }