1 files changed, 8 insertions, 0 deletions
diff --git a/Modules/_io/iobase.c b/Modules/_io/iobase.c
index ec7a242..f06f562 100644
--- a/Modules/_io/iobase.c
+++ b/Modules/_io/iobase.c
@@ -815,6 +815,14 @@ rawiobase_readall(PyObject *self, PyObject *args)
             Py_DECREF(chunks);
             return NULL;
         }
+        if (data == Py_None) {
+            if (PyList_GET_SIZE(chunks) == 0) {
+                Py_DECREF(chunks);
+                return data;
+            }
+            Py_DECREF(data);
+            break;
+        }
         if (!PyBytes_Check(data)) {
             Py_DECREF(chunks);
             Py_DECREF(data);