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[3.12] gh-105375: Improve error handling in the sys extension module (GH-105611) (#105665)

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In _PySys_AddXOptionWithError() and sys_add_xoption(),
bail on first error to prevent exceptions from possibly being
overwritten.
(cherry picked from commit 41cddc2e93)

Co-authored-by: Erlend E. Aasland <erlend.aasland@protonmail.com>
This commit is contained in:
Miss Islington (bot) 2023-06-11 14:12:17 -07:00 • committed by GitHub
parent 82ac2be6b3
commit a1034b5fd3
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 20 additions and 6 deletions
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24
Python/sysmodule.c
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@ -2718,14 +2718,20 @@ _PySys_AddXOptionWithError(const wchar_t *s)
const wchar_t *name_end = wcschr(s, L'=');
if (!name_end) {
name = PyUnicode_FromWideChar(s, -1);
if (name == NULL) {
goto error;
}
value = Py_NewRef(Py_True);
}
else {
name = PyUnicode_FromWideChar(s, name_end - s);
if (name == NULL) {
goto error;
}
value = PyUnicode_FromWideChar(name_end + 1, -1);
}
if (name == NULL || value == NULL) {
goto error;
if (value == NULL) {
goto error;
}
}
if (PyDict_SetItem(opts, name, value) < 0) {
goto error;
@ -3370,14 +3376,20 @@ sys_add_xoption(PyObject *opts, const wchar_t *s)
const wchar_t *name_end = wcschr(s, L'=');
if (!name_end) {
name = PyUnicode_FromWideChar(s, -1);
if (name == NULL) {
goto error;
}
value = Py_NewRef(Py_True);
}
else {
name = PyUnicode_FromWideChar(s, name_end - s);
if (name == NULL) {
goto error;
}
value = PyUnicode_FromWideChar(name_end + 1, -1);
}
if (name == NULL || value == NULL) {
goto error;
if (value == NULL) {
goto error;
}
}
if (PyDict_SetItem(opts, name, value) < 0) {
goto error;