From 11bff12d49e347e3dc34c6f318fd8548556977aa Mon Sep 17 00:00:00 2001
From: Makiah Bennett <makiahtbennett@gmail.com>
Date: Sun, 3 Dec 2023 19:13:19 -0600
Subject: [PATCH] Avoid segfaulting while manipulating carbon bonds and
 associated hydrogens

Signed-off-by: Makiah Bennett <makiahtbennett@gmail.com>
---
 avogadro/qtgui/hydrogentools.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/avogadro/qtgui/hydrogentools.cpp b/avogadro/qtgui/hydrogentools.cpp
index 3187889dbf..b7b5266b2d 100644
--- a/avogadro/qtgui/hydrogentools.cpp
+++ b/avogadro/qtgui/hydrogentools.cpp
@@ -134,6 +134,9 @@ void HydrogenTools::adjustHydrogens(RWAtom& atom, Adjustment adjustment)
   // convenience
   RWMolecule* molecule = atom.molecule();
 
+  if (molecule == nullptr)
+    return;
+
   if (doRemove) {
     // get the list of hydrogens connected to this
     std::vector<size_t> badHIndices;