diff --git a/Python/pythonrun.c b/Python/pythonrun.c
index df814fb..25e2da4 100644
--- a/Python/pythonrun.c
+++ b/Python/pythonrun.c
@@ -817,13 +817,21 @@
 
     if (seen != NULL) {
         /* Exception chaining */
-        if (PySet_Add(seen, value) == -1)
+        PyObject *value_id = PyLong_FromVoidPtr(value);
+        if (value_id == NULL || PySet_Add(seen, value_id) == -1)
             PyErr_Clear();
         else if (PyExceptionInstance_Check(value)) {
+            PyObject *check_id = NULL;
             cause = PyException_GetCause(value);
             context = PyException_GetContext(value);
             if (cause) {
-                res = PySet_Contains(seen, cause);
+                check_id = PyLong_FromVoidPtr(cause);
+                if (check_id == NULL) {
+                    res = -1;
+                } else {
+                    res = PySet_Contains(seen, check_id);
+                    Py_DECREF(check_id);
+                }
                 if (res == -1)
                     PyErr_Clear();
                 if (res == 0) {
@@ -835,7 +843,13 @@
             }
             else if (context &&
                 !((PyBaseExceptionObject *)value)->suppress_context) {
-                res = PySet_Contains(seen, context);
+                check_id = PyLong_FromVoidPtr(context);
+                if (check_id == NULL) {
+                    res = -1;
+                } else {
+                    res = PySet_Contains(seen, check_id);
+                    Py_DECREF(check_id);
+                }
                 if (res == -1)
                     PyErr_Clear();
                 if (res == 0) {
@@ -848,6 +862,7 @@
             Py_XDECREF(context);
             Py_XDECREF(cause);
         }
+        Py_XDECREF(value_id);
     }
     print_exception(f, value);
     if (err != 0)