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gh-122888: Fix crash on certain calls to str() (#122889)

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Fixes #122888
This commit is contained in:
Jelle Zijlstra 2024-08-12 09:20:09 -07:00 committed by GitHub
parent 7c22ab5b38
commit 53ebb6232a
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GPG Key ID: B5690EEEBB952194
3 changed files with 44 additions and 12 deletions
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43
Lib/test/test_str.py
View File

@ -1736,8 +1736,6 @@ class StrTest(string_tests.StringLikeTest,
'character buffers are decoded to unicode'
)
self.assertRaises(TypeError, str, 42, 42, 42)
def test_constructor_keyword_args(self):
"""Pass various keyword argument combinations to the constructor."""
# The object argument can be passed as a keyword.
@ -2652,22 +2650,45 @@ class StrTest(string_tests.StringLikeTest,
self.assertEqual(proc.rc, 10, proc)
def test_str_invalid_call(self):
check = lambda *a, **kw: self.assertRaises(TypeError, str, *a, **kw)
# too many args
check(1, "", "", 1)
with self.assertRaisesRegex(TypeError, r"str expected at most 3 arguments, got 4"):
str("too", "many", "argu", "ments")
with self.assertRaisesRegex(TypeError, r"str expected at most 3 arguments, got 4"):
str(1, "", "", 1)
# no such kw arg
check(test=1)
with self.assertRaisesRegex(TypeError, r"str\(\) got an unexpected keyword argument 'test'"):
str(test=1)
# 'encoding' must be str
check(1, encoding=1)
check(1, 1)
with self.assertRaisesRegex(TypeError, r"str\(\) argument 'encoding' must be str, not int"):
str(1, 1)
with self.assertRaisesRegex(TypeError, r"str\(\) argument 'encoding' must be str, not int"):
str(1, encoding=1)
with self.assertRaisesRegex(TypeError, r"str\(\) argument 'encoding' must be str, not bytes"):
str(b"x", b"ascii")
with self.assertRaisesRegex(TypeError, r"str\(\) argument 'encoding' must be str, not bytes"):
str(b"x", encoding=b"ascii")
# 'errors' must be str
check(1, errors=1)
check(1, "", errors=1)
check(1, 1, 1)
with self.assertRaisesRegex(TypeError, r"str\(\) argument 'encoding' must be str, not int"):
str(1, 1, 1)
with self.assertRaisesRegex(TypeError, r"str\(\) argument 'errors' must be str, not int"):
str(1, errors=1)
with self.assertRaisesRegex(TypeError, r"str\(\) argument 'errors' must be str, not int"):
str(1, "", errors=1)
with self.assertRaisesRegex(TypeError, r"str\(\) argument 'errors' must be str, not bytes"):
str(b"x", "ascii", b"strict")
with self.assertRaisesRegex(TypeError, r"str\(\) argument 'errors' must be str, not bytes"):
str(b"x", "ascii", errors=b"strict")
# both positional and kwarg
with self.assertRaisesRegex(TypeError, r"argument for str\(\) given by name \('encoding'\) and position \(2\)"):
str(b"x", "utf-8", encoding="ascii")
with self.assertRaisesRegex(TypeError, r"str\(\) takes at most 3 arguments \(4 given\)"):
str(b"x", "utf-8", "ignore", encoding="ascii")
with self.assertRaisesRegex(TypeError, r"str\(\) takes at most 3 arguments \(4 given\)"):
str(b"x", "utf-8", "strict", errors="ignore")
class StringModuleTest(unittest.TestCase):

2
Misc/NEWS.d/next/Core_and_Builtins/2024-08-10-12-44-03.gh-issue-122888.TUyu9r.rst Normal file
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@ -0,0 +1,2 @@
Fix crash on certain calls to ``str()`` with positional arguments of the
wrong type. Patch by Jelle Zijlstra.

11
Objects/unicodeobject.c
View File

@ -15121,7 +15121,16 @@ unicode_vectorcall(PyObject *type, PyObject *const *args,
return PyObject_Str(object);
}
const char *encoding = arg_as_utf8(args[1], "encoding");
const char *errors = (nargs == 3) ? arg_as_utf8(args[2], "errors") : NULL;
if (encoding == NULL) {
return NULL;
}
const char *errors = NULL;
if (nargs == 3) {
errors = arg_as_utf8(args[2], "errors");
if (errors == NULL) {
return NULL;
}
}
return PyUnicode_FromEncodedObject(object, encoding, errors);
}