From ae39fc5b21b1d6e7f0e5d9c50be0939b576e553b Mon Sep 17 00:00:00 2001
From: Axel Kohlmeyer <akohlmey@gmail.com>
Date: Mon, 5 Aug 2024 20:24:38 -0400
Subject: [PATCH] fix logic bug

---
 tools/lammps-gui/codeeditor.cpp | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/tools/lammps-gui/codeeditor.cpp b/tools/lammps-gui/codeeditor.cpp
index c60003db2d..8d52513bc9 100644
--- a/tools/lammps-gui/codeeditor.cpp
+++ b/tools/lammps-gui/codeeditor.cpp
@@ -773,9 +773,12 @@ void CodeEditor::contextMenuEvent(QContextMenuEvent *event)
                 // check if file is a LAMMPS restart
                 char magic[16] = "               ";
                 QFile file(word);
-                QDataStream in(&file);
-                in.readRawData(magic, 16);
-                if (strcmp(magic, LAMMPS_MAGIC) != 0) {
+                if (file.open(QIODevice::ReadOnly)) {
+                    QDataStream in(&file);
+                    in.readRawData(magic, 16);
+                    file.close();
+                }
+                if (strcmp(magic, LAMMPS_MAGIC) == 0) {
                     auto *action = menu->addAction(QString("Inspect restart file '%1'").arg(word));
                     action->setIcon(QIcon(":/icons/document-open.png"));
                     action->setData(word);