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Issue #22995: Default implementation of __reduce__ and __reduce_ex__ now 

rejects builtin types with not defined __new__.
Added tests for non-pickleable types.
This commit is contained in:
Serhiy Storchaka 2015-11-12 11:23:04 +02:00
parent a9dcdabccb
commit d7a4415599
6 changed files with 78 additions and 0 deletions
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18
Lib/test/test_dictviews.py
View File

@ -1,3 +1,5 @@
import copy
import pickle
import unittest
from test import support
@ -198,6 +200,22 @@ class DictSetTest(unittest.TestCase):
d[42] = d.values()
self.assertRaises(RuntimeError, repr, d)
def test_copy(self):
d = {1: 10, "a": "ABC"}
self.assertRaises(TypeError, copy.copy, d.keys())
self.assertRaises(TypeError, copy.copy, d.values())
self.assertRaises(TypeError, copy.copy, d.items())
def test_pickle(self):
d = {1: 10, "a": "ABC"}
for proto in range(pickle.HIGHEST_PROTOCOL + 1):
self.assertRaises((TypeError, pickle.PicklingError),
pickle.dumps, d.keys(), proto)
self.assertRaises((TypeError, pickle.PicklingError),
pickle.dumps, d.values(), proto)
self.assertRaises((TypeError, pickle.PicklingError),
pickle.dumps, d.items(), proto)
def test_main():
support.run_unittest(DictSetTest)

20
Lib/test/test_generators.py
View File

@ -1,4 +1,6 @@
import copy
import gc
import pickle
import sys
import unittest
import weakref
@ -70,6 +72,24 @@ class FinalizationTest(unittest.TestCase):
self.assertEqual(cm.exception.value, 2)
class GeneratorTest(unittest.TestCase):
def test_copy(self):
def f():
yield 1
g = f()
with self.assertRaises(TypeError):
copy.copy(g)
def test_pickle(self):
def f():
yield 1
g = f()
for proto in range(pickle.HIGHEST_PROTOCOL + 1):
with self.assertRaises((TypeError, pickle.PicklingError)):
pickle.dumps(g, proto)
class ExceptionTest(unittest.TestCase):
# Tests for the issue #23353: check that the currently handled exception
# is correctly saved/restored in PyEval_EvalFrameEx().

14
Lib/test/test_xml_etree.py
View File

@ -5,6 +5,7 @@
# For this purpose, the module-level "ET" symbol is temporarily
# monkey-patched when running the "test_xml_etree_c" test suite.
import copy
import html
import io
import operator
@ -2082,6 +2083,19 @@ class ElementIterTest(unittest.TestCase):
self.assertEqual(self._ilist(doc), all_tags)
self.assertEqual(self._ilist(doc, '*'), all_tags)
def test_copy(self):
a = ET.Element('a')
it = a.iter()
with self.assertRaises(TypeError):
copy.copy(it)
def test_pickle(self):
a = ET.Element('a')
it = a.iter()
for proto in range(pickle.HIGHEST_PROTOCOL + 1):
with self.assertRaises((TypeError, pickle.PicklingError)):
pickle.dumps(it, proto)
class TreeBuilderTest(unittest.TestCase):
sample1 = ('<!DOCTYPE html PUBLIC'

11
Lib/test/test_zlib.py
View File

@ -1,6 +1,7 @@
import unittest
from test import support
import binascii
import pickle
import random
import sys
from test.support import bigmemtest, _1G, _4G
@ -600,6 +601,16 @@ class CompressObjectTestCase(BaseCompressTestCase, unittest.TestCase):
d.flush()
self.assertRaises(ValueError, d.copy)
def test_compresspickle(self):
for proto in range(pickle.HIGHEST_PROTOCOL + 1):
with self.assertRaises((TypeError, pickle.PicklingError)):
pickle.dumps(zlib.compressobj(zlib.Z_BEST_COMPRESSION), proto)
def test_decompresspickle(self):
for proto in range(pickle.HIGHEST_PROTOCOL + 1):
with self.assertRaises((TypeError, pickle.PicklingError)):
pickle.dumps(zlib.decompressobj(), proto)
# Memory use of the following functions takes into account overallocation
@bigmemtest(size=_1G + 1024 * 1024, memuse=3)

3
Misc/NEWS
View File

@ -10,6 +10,9 @@ Release date: tba
Core and Builtins
-----------------
- Issue #22995: Default implementation of __reduce__ and __reduce_ex__ now
rejects builtin types with not defined __new__.
- Issue #24802: Avoid buffer overreads when int(), float(), compile(), exec()
and eval() are passed bytes-like objects. These objects are not
necessarily terminated by a null byte, but the functions assumed they were.

12
Objects/typeobject.c
View File

@ -3980,6 +3980,12 @@ reduce_4(PyObject *obj)
PyObject *result;
_Py_IDENTIFIER(__newobj_ex__);
if (Py_TYPE(obj)->tp_new == NULL) {
PyErr_Format(PyExc_TypeError,
"can't pickle %s objects",
Py_TYPE(obj)->tp_name);
return NULL;
}
if (_PyObject_GetNewArguments(obj, &args, &kwargs) < 0) {
return NULL;
}
@ -4046,6 +4052,12 @@ reduce_2(PyObject *obj)
Py_ssize_t i, n;
_Py_IDENTIFIER(__newobj__);
if (Py_TYPE(obj)->tp_new == NULL) {
PyErr_Format(PyExc_TypeError,
"can't pickle %s objects",
Py_TYPE(obj)->tp_name);
return NULL;
}
if (_PyObject_GetNewArguments(obj, &args, &kwargs) < 0) {
return NULL;
}