initialize more global type objects (closes #16369)
diff --git a/Objects/object.c b/Objects/object.c
index 9fea13a..e732dce 100644
--- a/Objects/object.c
+++ b/Objects/object.c
@@ -2198,6 +2198,18 @@
 
     if (PyType_Ready(&PyFile_Type) < 0)
         Py_FatalError("Can't initialize file type");
+
+    if (PyType_Ready(&PyCapsule_Type) < 0)
+        Py_FatalError("Can't initialize capsule type");
+
+    if (PyType_Ready(&PyCell_Type) < 0)
+        Py_FatalError("Can't initialize cell type");
+
+    if (PyType_Ready(&PyCallIter_Type) < 0)
+        Py_FatalError("Can't initialize call iter type");
+
+    if (PyType_Ready(&PySeqIter_Type) < 0)
+        Py_FatalError("Can't initialize sequence iterator type");
 }