bpo-38530: Cover more error paths in error suggestion functions (GH-25462)
diff --git a/Python/suggestions.c b/Python/suggestions.c
index aa4870d..d4e9dc2 100644
--- a/Python/suggestions.c
+++ b/Python/suggestions.c
@@ -8,7 +8,7 @@
#define MAX_STRING_SIZE 25
/* Calculate the Levenshtein distance between string1 and string2 */
-static size_t
+static Py_ssize_t
levenshtein_distance(const char *a, size_t a_size,
const char *b, size_t b_size) {
@@ -33,7 +33,7 @@ levenshtein_distance(const char *a, size_t a_size,
size_t *buffer = PyMem_Calloc(a_size, sizeof(size_t));
if (buffer == NULL) {
- return 0;
+ return -1;
}
// Initialize the buffer row
@@ -99,6 +99,9 @@ calculate_suggestions(PyObject *dir,
}
Py_ssize_t current_distance = levenshtein_distance(
name_str, name_size, item_str, item_size);
+ if (current_distance == -1) {
+ return NULL;
+ }
if (current_distance == 0 || current_distance > MAX_DISTANCE) {
continue;
}