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[3.13] gh-148157: Check for _PyPegen_add_type_comment_to_arg fail in _PyPegen_name_default_pair (GH-148158) (#148163)

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(cherry picked from commit 1795fccfbc)

Co-authored-by: Stan Ulbrych <stan@python.org>
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Miss Islington (bot) 2026-04-06 14:13:32 +02:00 • committed by GitHub
parent 9b576f14bf
commit 4dfcdbe22c
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3
Lib/test/test_type_comments.py
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@ -398,6 +398,9 @@ def test_non_utf8_type_comment_with_ignore_cookie(self):
with self.assertRaises(UnicodeDecodeError):
_testcapi.Py_CompileStringExFlags(
b"a=1 # type: \x80", "<test>", 256, flags)
with self.assertRaises(UnicodeDecodeError):
_testcapi.Py_CompileStringExFlags(
b"def a(f=8, #type: \x80\n\x80", "<test>", 256, flags)
def test_func_type_input(self):

2
Misc/NEWS.d/next/Core_and_Builtins/2026-04-06-11-15-46.gh-issue-148157.JFnZDn.rst Normal file
View file

@ -0,0 +1,2 @@
Fix an unlikely crash when parsing an invalid type comments for function
parameters. Found by OSS Fuzz in :oss-fuzz:`492782951`.

3
Parser/action_helpers.c
View file

@ -434,6 +434,9 @@ _PyPegen_name_default_pair(Parser *p, arg_ty arg, expr_ty value, Token *tc)
return NULL;
}
a->arg = _PyPegen_add_type_comment_to_arg(p, arg, tc);
if (!a->arg) {
return NULL;
}
a->value = value;
return a;
}