[2.7] bpo-20047: Make bytearray methods partition() and rpartition() rejecting (GH-4158) (#4163)

separators that are not bytes-like objects..
(cherry picked from commit a2314283)

Lib/test/test_bytes.py

@@ -336,8 +336,16 @@ class BaseBytesTest(unittest.TestCase):
         self.assertEqual(b.replace(b'i', b'a'), b'massassappa')
         self.assertEqual(b.replace(b'ss', b'x'), b'mixixippi')
 
+    def test_replace_int_error(self):
+        self.assertRaises(TypeError, self.type2test(b'a b').replace, 32, b'')
+
     def test_split_string_error(self):
         self.assertRaises(TypeError, self.type2test(b'a b').split, u' ')
+        self.assertRaises(TypeError, self.type2test(b'a b').rsplit, u' ')
+
+    def test_split_int_error(self):
+        self.assertRaises(TypeError, self.type2test(b'a b').split, 32)
+        self.assertRaises(TypeError, self.type2test(b'a b').rsplit, 32)
 
     def test_split_unicodewhitespace(self):
         for b in (b'a\x1Cb', b'a\x1Db', b'a\x1Eb', b'a\x1Fb'):
@@ -346,9 +354,6 @@ class BaseBytesTest(unittest.TestCase):
         b = self.type2test(b"\x09\x0A\x0B\x0C\x0D\x1C\x1D\x1E\x1F")
         self.assertEqual(b.split(), [b'\x1c\x1d\x1e\x1f'])
 
-    def test_rsplit_string_error(self):
-        self.assertRaises(TypeError, self.type2test(b'a b').rsplit, u' ')
-
     def test_rsplit_unicodewhitespace(self):
         b = self.type2test(b"\x09\x0A\x0B\x0C\x0D\x1C\x1D\x1E\x1F")
         self.assertEqual(b.rsplit(), [b'\x1c\x1d\x1e\x1f'])
@@ -364,6 +369,14 @@ class BaseBytesTest(unittest.TestCase):
         self.assertEqual(b.rpartition(b'i'), (b'mississipp', b'i', b''))
         self.assertEqual(b.rpartition(b'w'), (b'', b'', b'mississippi'))
 
+    def test_partition_string_error(self):
+        self.assertRaises(TypeError, self.type2test(b'a b').partition, u' ')
+        self.assertRaises(TypeError, self.type2test(b'a b').rpartition, u' ')
+
+    def test_partition_int_error(self):
+        self.assertRaises(TypeError, self.type2test(b'a b').partition, 32)
+        self.assertRaises(TypeError, self.type2test(b'a b').rpartition, 32)
+
     def test_pickling(self):
         for proto in range(pickle.HIGHEST_PROTOCOL + 1):
             for b in b"", b"a", b"abc", b"\xffab\x80", b"\0\0\377\0\0":
@@ -378,9 +391,19 @@ class BaseBytesTest(unittest.TestCase):
         self.assertEqual(self.type2test(b'abc').rstrip(memoryview(b'ac')), b'ab')
 
     def test_strip_string_error(self):
-        self.assertRaises(TypeError, self.type2test(b'abc').strip, u'b')
-        self.assertRaises(TypeError, self.type2test(b'abc').lstrip, u'b')
-        self.assertRaises(TypeError, self.type2test(b'abc').rstrip, u'b')
+        self.assertRaises(TypeError, self.type2test(b'abc').strip, u'ac')
+        self.assertRaises(TypeError, self.type2test(b'abc').lstrip, u'ac')
+        self.assertRaises(TypeError, self.type2test(b'abc').rstrip, u'ac')
+
+    def test_strip_int_error(self):
+        self.assertRaises(TypeError, self.type2test(b' abc ').strip, 32)
+        self.assertRaises(TypeError, self.type2test(b' abc ').lstrip, 32)
+        self.assertRaises(TypeError, self.type2test(b' abc ').rstrip, 32)
+
+    def test_xjust_int_error(self):
+        self.assertRaises(TypeError, self.type2test(b'abc').center, 7, 32)
+        self.assertRaises(TypeError, self.type2test(b'abc').ljust, 7, 32)
+        self.assertRaises(TypeError, self.type2test(b'abc').rjust, 7, 32)
 
     def test_ord(self):
         b = self.type2test(b'\0A\x7f\x80\xff')

Misc/NEWS.d/next/Core and Builtins/2017-10-28-19-11-05.bpo-20047.GuNAto.rst

+Bytearray methods partition() and rpartition() now accept only bytes-like
+objects as separator, as documented.  In particular they now raise TypeError
+rather of returning a bogus result when an integer is passed as a separator.

Objects/bytearrayobject.c

@@ -164,6 +164,26 @@ PyByteArray_FromObject(PyObject *input)
                                         input, NULL);
 }
 
+static PyObject *
+_PyByteArray_FromBufferObject(PyObject *obj)
+{
+    PyObject *result;
+    Py_buffer view;
+
+    if (PyObject_GetBuffer(obj, &view, PyBUF_FULL_RO) < 0) {
+        return NULL;
+    }
+    result = PyByteArray_FromStringAndSize(NULL, view.len);
+    if (result != NULL &&
+        PyBuffer_ToContiguous(PyByteArray_AS_STRING(result),
+                              &view, view.len, 'C') < 0)
+    {
+        Py_CLEAR(result);
+    }
+    PyBuffer_Release(&view);
+    return result;
+}
+
 PyObject *
 PyByteArray_FromStringAndSize(const char *bytes, Py_ssize_t size)
 {
@@ -483,7 +503,8 @@ bytearray_setslice(PyByteArrayObject *self, Py_ssize_t lo, Py_ssize_t hi,
     if (values == (PyObject *)self) {
         /* Make a copy and call this function recursively */
         int err;
-        values = PyByteArray_FromObject(values);
+        values = PyByteArray_FromStringAndSize(PyByteArray_AS_STRING(values),
+                                               PyByteArray_GET_SIZE(values));
         if (values == NULL)
             return -1;
         err = bytearray_setslice(self, lo, hi, values);
@@ -2098,7 +2119,7 @@ bytearray_partition(PyByteArrayObject *self, PyObject *sep_obj)
 {
     PyObject *bytesep, *result;
 
-    bytesep = PyByteArray_FromObject(sep_obj);
+    bytesep = _PyByteArray_FromBufferObject(sep_obj);
     if (! bytesep)
         return NULL;
 
@@ -2126,7 +2147,7 @@ bytearray_rpartition(PyByteArrayObject *self, PyObject *sep_obj)
 {
     PyObject *bytesep, *result;
 
-    bytesep = PyByteArray_FromObject(sep_obj);
+    bytesep = _PyByteArray_FromBufferObject(sep_obj);
     if (! bytesep)
         return NULL;