python · vstinner · Nov 22, 2018 · Nov 22, 2018
diff --git a/Objects/object.c b/Objects/object.c
@@ -423,6 +423,10 @@ _Py_BreakPoint(void)
 int
 _PyObject_IsFreed(PyObject *op)
 {
+    uintptr_t ptr = (uintptr_t)op;
+    if (_PyMem_IsFreed(&ptr, sizeof(ptr))) {
+        return 1;
+    }
    int freed = _PyMem_IsFreed(&op->ob_type, sizeof(op->ob_type));
    /* ignore op->ob_ref: the value can have be modified
       by Py_INCREF() and Py_DECREF(). */
@@ -448,6 +452,7 @@ _PyObject_Dump(PyObject* op)
        /* It seems like the object memory has been freed:
           don't access it to prevent a segmentation fault. */
        fprintf(stderr, "<freed object>\n");
+        return;
    }

    PyGILState_STATE gil;