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gh-98852: Fix subscription of type aliases (GH-98920)

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Fix subscription of type aliases containing bare generic types or types
like TypeVar: for example tuple[A, T][int] and tuple[TypeVar, T][int],
where A is a generic type, and T is a type variable.
This commit is contained in:
Serhiy Storchaka 2022-11-01 09:33:09 +02:00 • committed by GitHub
parent f5afb7f233
commit 0e15c31c7e
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4 changed files with 43 additions and 0 deletions
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7
Objects/genericaliasobject.c
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@ -458,6 +458,13 @@ _Py_subs_parameters(PyObject *self, PyObject *args, PyObject *parameters, PyObje
}
for (Py_ssize_t iarg = 0, jarg = 0; iarg < nargs; iarg++) {
PyObject *arg = PyTuple_GET_ITEM(args, iarg);
if (PyType_Check(arg)) {
Py_INCREF(arg);
PyTuple_SET_ITEM(newargs, jarg, arg);
jarg++;
continue;
}
int unpack = _is_unpacked_typevartuple(arg);
if (unpack < 0) {
Py_DECREF(newargs);