[Python-checkins] cpython (merge 3.5 -> default): merge 3.5 (closes #24806)
benjamin.peterson
python-checkins at python.org
Tue Oct 6 22:42:57 EDT 2015
https://hg.python.org/cpython/rev/4b2a2688d2ad
changeset: 98575:4b2a2688d2ad
parent: 98570:db782c81bba9
parent: 98574:e02e4afcce6a
user: Benjamin Peterson <benjamin at python.org>
date: Tue Oct 06 19:42:46 2015 -0700
summary:
merge 3.5 (closes #24806)
files:
Lib/test/test_descr.py | 31 ++++++++++++++++++++++++++++++
Misc/NEWS | 3 ++
Objects/typeobject.c | 12 +++++-----
3 files changed, 40 insertions(+), 6 deletions(-)
diff --git a/Lib/test/test_descr.py b/Lib/test/test_descr.py
--- a/Lib/test/test_descr.py
+++ b/Lib/test/test_descr.py
@@ -3798,6 +3798,37 @@
else:
assert 0, "best_base calculation found wanting"
+ def test_unsubclassable_types(self):
+ with self.assertRaises(TypeError):
+ class X(type(None)):
+ pass
+ with self.assertRaises(TypeError):
+ class X(object, type(None)):
+ pass
+ with self.assertRaises(TypeError):
+ class X(type(None), object):
+ pass
+ class O(object):
+ pass
+ with self.assertRaises(TypeError):
+ class X(O, type(None)):
+ pass
+ with self.assertRaises(TypeError):
+ class X(type(None), O):
+ pass
+
+ class X(object):
+ pass
+ with self.assertRaises(TypeError):
+ X.__bases__ = type(None),
+ with self.assertRaises(TypeError):
+ X.__bases__ = object, type(None)
+ with self.assertRaises(TypeError):
+ X.__bases__ = type(None), object
+ with self.assertRaises(TypeError):
+ X.__bases__ = O, type(None)
+ with self.assertRaises(TypeError):
+ X.__bases__ = type(None), O
def test_mutable_bases_with_failing_mro(self):
# Testing mutable bases with failing mro...
diff --git a/Misc/NEWS b/Misc/NEWS
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -10,6 +10,9 @@
Core and Builtins
-----------------
+- Issue #24806: Prevent builtin types that are not allowed to be subclassed from
+ being subclassed through multiple inheritance.
+
* Issue #25301: The UTF-8 decoder is now up to 15 times as fast for error
handlers: ``ignore``, ``replace`` and ``surrogateescape``.
diff --git a/Objects/typeobject.c b/Objects/typeobject.c
--- a/Objects/typeobject.c
+++ b/Objects/typeobject.c
@@ -1973,6 +1973,12 @@
if (PyType_Ready(base_i) < 0)
return NULL;
}
+ if (!PyType_HasFeature(base_i, Py_TPFLAGS_BASETYPE)) {
+ PyErr_Format(PyExc_TypeError,
+ "type '%.100s' is not an acceptable base type",
+ base_i->tp_name);
+ return NULL;
+ }
candidate = solid_base(base_i);
if (winner == NULL) {
winner = candidate;
@@ -2353,12 +2359,6 @@
if (base == NULL) {
goto error;
}
- if (!PyType_HasFeature(base, Py_TPFLAGS_BASETYPE)) {
- PyErr_Format(PyExc_TypeError,
- "type '%.100s' is not an acceptable base type",
- base->tp_name);
- goto error;
- }
dict = PyDict_Copy(orig_dict);
if (dict == NULL)
--
Repository URL: https://hg.python.org/cpython
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