From 2dbe6516266a1b7078c073e6e8bec8bb961e1f73 Mon Sep 17 00:00:00 2001
From: Chris Hennes <chennes@pioneerlibrarysystem.org>
Date: Thu, 20 Mar 2025 21:32:04 -0500
Subject: [PATCH] App: Check for an invalid enum before proceeding

---
 src/App/PropertyStandard.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/App/PropertyStandard.cpp b/src/App/PropertyStandard.cpp
index b7eda1a93e..77f12cd513 100644
--- a/src/App/PropertyStandard.cpp
+++ b/src/App/PropertyStandard.cpp
@@ -601,7 +601,11 @@ bool PropertyEnumeration::getPyPathValue(const ObjectIdentifier& path, Py::Objec
     std::string p = path.getSubPathStr();
     if (p == ".Enum" || p == ".All") {
         Base::PyGILStateLocker lock;
-        Py::Tuple res(_enum.maxValue() + 1);
+        auto maxEnumValue = _enum.maxValue();
+        if (maxEnumValue < 0) {
+            return false;  // The enum is invalid
+        }
+        Py::Tuple res(maxEnumValue + 1);
         std::vector<std::string> enums = _enum.getEnumVector();
         PropertyString tmp;
         for (int i = 0; i < int(enums.size()); ++i) {