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Issue #23640: int.from_bytes() no longer bypasses constructors for subclasses.

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This commit is contained in:
Serhiy Storchaka 2016-05-12 10:39:32 +03:00
commit 1f364438ad
6 changed files with 56 additions and 21 deletions
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24
Objects/longobject.c
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@ -5199,27 +5199,9 @@ long_from_bytes(PyTypeObject *type, PyObject *args, PyObject *kwds)
little_endian, is_signed);
Py_DECREF(bytes);
/* If from_bytes() was used on subclass, allocate new subclass
* instance, initialize it with decoded int value and return it.
*/
if (type != &PyLong_Type && PyType_IsSubtype(type, &PyLong_Type)) {
PyLongObject *newobj;
int i;
Py_ssize_t n = Py_ABS(Py_SIZE(long_obj));
newobj = (PyLongObject *)type->tp_alloc(type, n);
if (newobj == NULL) {
Py_DECREF(long_obj);
return NULL;
}
assert(PyLong_Check(newobj));
Py_SIZE(newobj) = Py_SIZE(long_obj);
for (i = 0; i < n; i++) {
newobj->ob_digit[i] =
((PyLongObject *)long_obj)->ob_digit[i];
}
Py_DECREF(long_obj);
return (PyObject *)newobj;
if (type != &PyLong_Type) {
Py_SETREF(long_obj, PyObject_CallFunctionObjArgs((PyObject *)type,
long_obj, NULL));
}
return long_obj;