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bpo-36650: Fix handling of empty keyword args in C version of lru_cache. (GH-12881)

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Raymond Hettinger 2019-04-20 07:20:44 -10:00 • committed by GitHub
parent 9d062d690b
commit 14adbd4598
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3 changed files with 21 additions and 4 deletions
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7
Modules/_functoolsmodule.c
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@ -750,8 +750,10 @@ lru_cache_make_key(PyObject *args, PyObject *kwds, int typed)
PyObject *key, *keyword, *value;
Py_ssize_t key_size, pos, key_pos, kwds_size;
kwds_size = kwds ? PyDict_GET_SIZE(kwds) : 0;
/* short path, key will match args anyway, which is a tuple */
if (!typed && !kwds) {
if (!typed && !kwds_size) {
if (PyTuple_GET_SIZE(args) == 1) {
key = PyTuple_GET_ITEM(args, 0);
if (PyUnicode_CheckExact(key) || PyLong_CheckExact(key)) {
@ -765,9 +767,6 @@ lru_cache_make_key(PyObject *args, PyObject *kwds, int typed)
return args;
}
kwds_size = kwds ? PyDict_GET_SIZE(kwds) : 0;
assert(kwds_size >= 0);
key_size = PyTuple_GET_SIZE(args);
if (kwds_size)
key_size += kwds_size * 2 + 1;