From 9380c41486790e777e1541543a17b360458eb6b4 Mon Sep 17 00:00:00 2001
From: Geoff Hutchison <geoff.hutchison@gmail.com>
Date: Thu, 23 Jan 2025 12:48:45 -0500
Subject: [PATCH] Check to add bonds of valid atoms

Signed-off-by: Geoff Hutchison <geoff.hutchison@gmail.com>
---
 avogadro/io/pdbformat.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/avogadro/io/pdbformat.cpp b/avogadro/io/pdbformat.cpp
index 96d9cfafc3..f3379cc268 100644
--- a/avogadro/io/pdbformat.cpp
+++ b/avogadro/io/pdbformat.cpp
@@ -243,7 +243,8 @@ bool PdbFormat::read(std::istream& in, Core::Molecule& mol)
           b = b - terCount;
           b = rawToAtomId[b];
 
-          if (a < b && a >= 0 && b >= 0) {
+          if (a < b && a >= 0 && b >= 0 && a < mol.atomCount() &&
+              b < mol.atomCount()) {
             mol.Avogadro::Core::Molecule::addBond(a, b, 1);
           }
         }