Issue #6846: bytearray.pop was returning ints in the range [-128, 128)

instead of [0, 256).  Thanks Hagen Fürstenau for the report and fix.

Lib/test/test_bytes.py

@@ -690,6 +690,8 @@ class ByteArrayTest(BaseBytesTest):
         self.assertEqual(b.pop(-2), ord('r'))
         self.assertRaises(IndexError, lambda: b.pop(10))
         self.assertRaises(OverflowError, lambda: bytearray().pop())
+        # test for issue #6846
+        self.assertEqual(bytearray(b'\xff').pop(), 0xff)
 
     def test_nosort(self):
         self.assertRaises(AttributeError, lambda: bytearray().sort())

Misc/NEWS

@@ -12,6 +12,8 @@ What's New in Python 2.7 alpha 1
 Core and Builtins
 -----------------
 
+- Issue #6846: Fix bug where bytearray.pop() returns negative integers.
+
 - classmethod no longer checks if its argument is callable.
 
 - Issue #6750: A text file opened with io.open() could duplicate its output

Objects/bytearrayobject.c

@@ -2773,7 +2773,7 @@ bytearray_pop(PyByteArrayObject *self, PyObject *args)
     if (PyByteArray_Resize((PyObject *)self, n - 1) < 0)
         return NULL;
 
-    return PyInt_FromLong(value);
+    return PyInt_FromLong((unsigned char)value);
 }
 
 PyDoc_STRVAR(remove__doc__,