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gh-96848: Fix -X int_max_str_digits option parsing #96988

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Sep 26, 2022
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gh-96848: Fix -X int_max_str_digits option parsing #96988

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2 changes: 2 additions & 0 deletions Lib/test/test_cmd_line.py
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Original file line number Diff line number Diff line change
Expand Up @@ -871,6 +871,8 @@ def test_int_max_str_digits(self):
assert_python_failure('-X', 'int_max_str_digits', '-c', code)
assert_python_failure('-X', 'int_max_str_digits=foo', '-c', code)
assert_python_failure('-X', 'int_max_str_digits=100', '-c', code)
assert_python_failure('-X', 'int_max_str_digits', '-c', code,
PYTHONINTMAXSTRDIGITS='4000')

assert_python_failure('-c', code, PYTHONINTMAXSTRDIGITS='foo')
assert_python_failure('-c', code, PYTHONINTMAXSTRDIGITS='100')
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3 changes: 3 additions & 0 deletions Misc/NEWS.d/next/Core and Builtins/2022-09-21-14-38-31.gh-issue-96848.WuoLzU.rst
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Original file line number Diff line number Diff line change
@@ -0,0 +1,3 @@
Fix command line parsing: reject :option:`-X int_max_str_digits <-X>` option
with no value (invalid) when the :envvar:`PYTHONINTMAXSTRDIGITS` environment
variable is set to a valid limit. Patch by Victor Stinner.
3 changes: 2 additions & 1 deletion Python/initconfig.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1779,10 +1779,10 @@ static PyStatus
config_init_int_max_str_digits(PyConfig *config)
{
int maxdigits;
int valid = 0;

const char *env = config_get_env(config, "PYTHONINTMAXSTRDIGITS");
if (env) {
int valid = 0;
if (!_Py_str_to_int(env, &maxdigits)) {
valid = ((maxdigits == 0) || (maxdigits >= _PY_LONG_MAX_STR_DIGITS_THRESHOLD));
}
Expand All @@ -1800,6 +1800,7 @@ config_init_int_max_str_digits(PyConfig *config)
const wchar_t *xoption = config_get_xoption(config, L"int_max_str_digits");
if (xoption) {
const wchar_t *sep = wcschr(xoption, L'=');
int valid = 0;
if (sep) {
if (!config_wstr_to_int(sep + 1, &maxdigits)) {
valid = ((maxdigits == 0) || (maxdigits >= _PY_LONG_MAX_STR_DIGITS_THRESHOLD));
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