Update Python 3 to 3.13.14

commit_hash:9913a0288f56b5ddd0f99e5b2ff1569d491cbe5d

1 files changed, 13 insertions, 1 deletions

diff --git a/contrib/tools/python3/Lib/tomllib/_parser.py b/contrib/tools/python3/Lib/tomllib/_parser.py
index 9c80a6a547d..a1f7ffd6d24 100644
--- a/contrib/tools/python3/Lib/tomllib/_parser.py
+++ b/contrib/tools/python3/Lib/tomllib/_parser.py
@@ -6,8 +6,9 @@ from __future__ import annotations
 
 from collections.abc import Iterable
 import string
+import sys
 from types import MappingProxyType
-from typing import Any, BinaryIO, NamedTuple
+from typing import Any, BinaryIO, NamedTuple, Final
 
 from ._re import (
     RE_DATETIME,
@@ -19,6 +20,13 @@ from ._re import (
 )
 from ._types import Key, ParseFloat, Pos
 
+# Pathologically excessive number of parts in a key runs into quadratic
+# behavior (e.g. in Flags.is_).
+# Even if keys aren't currently parsed using recursion, they name a
+# recursive structure, so it makes sense to limit it using getrecursionlimit()
+# and RecursionError.
+MAX_KEY_PARTS: Final = sys.getrecursionlimit()
+
 ASCII_CTRL = frozenset(chr(i) for i in range(32)) | frozenset(chr(127))
 
 # Neither of these sets include quotation mark or backslash. They are
@@ -385,6 +393,10 @@ def parse_key(src: str, pos: Pos) -> tuple[Pos, Key]:
         pos = skip_chars(src, pos, TOML_WS)
         pos, key_part = parse_key_part(src, pos)
         key += (key_part,)
+        if len(key) > MAX_KEY_PARTS:
+            raise RecursionError(
+                f"TOML key has more than the allowed {MAX_KEY_PARTS} parts"
+            )
         pos = skip_chars(src, pos, TOML_WS)