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disallow a negative idx parameter

This commit is contained in:
Benjamin Peterson 2014-04-14 11:45:21 -04:00
parent 99b5afab74
commit 6ef2b36afa
1 changed files with 5 additions and 4 deletions
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9
Modules/_json.c
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@ -930,10 +930,11 @@ scan_once_unicode(PyScannerObject *s, PyObject *pystr, Py_ssize_t idx, Py_ssize_
PyObject *res;
Py_UNICODE *str = PyUnicode_AS_UNICODE(pystr);
Py_ssize_t length = PyUnicode_GET_SIZE(pystr);
if (idx < 0)
/* Compatibility with Python version. */
idx += length;
if (idx < 0 || idx >= length) {
if (idx < 0) {
PyErr_SetString(PyExc_ValueError, "idx canont be negative");
return NULL;
}
if (idx >= length) {
PyErr_SetNone(PyExc_StopIteration);
return NULL;
}