1 files changed, 4 insertions, 0 deletions
diff --git a/Modules/signalmodule.c b/Modules/signalmodule.c
index 80fa4d5..bcfd553 100644
--- a/Modules/signalmodule.c
+++ b/Modules/signalmodule.c
@@ -177,6 +177,10 @@ get_signal_state(PyObject *module)
 static inline int
 compare_handler(PyObject *func, PyObject *dfl_ign_handler)
 {
+    // See https://github.com/python/cpython/pull/102399
+    if (func == NULL || dfl_ign_handler == NULL) {
+        return 0;
+    }
     assert(PyLong_CheckExact(dfl_ign_handler));
     if (!PyLong_CheckExact(func)) {
         return 0;