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[3.11] gh-106030: Miscellaneous fixes in Python/suggestions.c (GH-106… (GH-106039) 

* PyUnicode_CompareWithASCIIString() only works if the second argument
  is ASCII string.
* Refleak in get_suggestions_for_name_error.
* Add some missing error checks.

(cherry picked from commit c8c162ef52)
This commit is contained in:
Serhiy Storchaka 2023-06-23 21:13:07 +03:00 committed by GitHub
parent 15f4bba7a7
commit 26d87fd5c7
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 6 additions and 6 deletions
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12
Python/suggestions.c
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@ -147,14 +147,14 @@ calculate_suggestions(PyObject *dir,
for (int i = 0; i < dir_size; ++i) {
PyObject *item = PyList_GET_ITEM(dir, i);
if (_PyUnicode_Equal(name, item)) {
continue;
}
Py_ssize_t item_size;
const char *item_str = PyUnicode_AsUTF8AndSize(item, &item_size);
if (item_str == NULL) {
return NULL;
}
if (PyUnicode_CompareWithASCIIString(name, item_str) == 0) {
continue;
}
// No more than 1/3 of the involved characters should need changed.
Py_ssize_t max_distance = (name_size + item_size + 3) * MOVE_COST / 6;
// Don't take matches we've already beaten.
@ -225,19 +225,19 @@ offer_suggestions_for_name_error(PyNameErrorObject *exc)
PyCodeObject *code = PyFrame_GetCode(frame);
assert(code != NULL && code->co_localsplusnames != NULL);
PyObject *varnames = _PyCode_GetVarnames(code);
Py_DECREF(code);
if (varnames == NULL) {
return NULL;
}
PyObject *dir = PySequence_List(varnames);
Py_DECREF(varnames);
Py_DECREF(code);
if (dir == NULL) {
return NULL;
}
PyObject *suggestions = calculate_suggestions(dir, name);
Py_DECREF(dir);
if (suggestions != NULL) {
if (suggestions != NULL|| PyErr_Occurred()) {
return suggestions;
}
@ -247,7 +247,7 @@ offer_suggestions_for_name_error(PyNameErrorObject *exc)
}
suggestions = calculate_suggestions(dir, name);
Py_DECREF(dir);
if (suggestions != NULL) {
if (suggestions != NULL || PyErr_Occurred()) {
return suggestions;
}