1 files changed, 10 insertions, 0 deletions
diff --git a/Python/pylifecycle.c b/Python/pylifecycle.c
index 9228778..8abd536 100644
--- a/Python/pylifecycle.c
+++ b/Python/pylifecycle.c
@@ -774,6 +774,16 @@ pycore_init_builtins(PyThreadState *tstate)
     Py_INCREF(builtins_dict);
     interp->builtins = builtins_dict;
 
+    PyObject *isinstance = PyDict_GetItem(builtins_dict, &_Py_ID(isinstance));
+    assert(isinstance);
+    interp->callable_cache.isinstance = isinstance;
+    PyObject *len = PyDict_GetItem(builtins_dict, &_Py_ID(len));
+    assert(len);
+    interp->callable_cache.len = len;
+    PyObject *list_append = _PyType_Lookup(&PyList_Type, &_Py_ID(append));
+    assert(list_append);
+    interp->callable_cache.list_append = list_append;
+
     if (_PyBuiltins_AddExceptions(bimod) < 0) {
         return _PyStatus_ERR("failed to add exceptions to builtins");
     }