Don't publish acquired attributes if acquired object has no docstring.

See https://bugs.launchpad.net/zope2/+bug/713253/

doc/CHANGES.rst

@@ -5,7 +5,7 @@ This file contains change information for the current Zope release.
 Change information for previous versions of Zope can be found at
 http://docs.zope.org/zope2/releases/.
 
-2.13.3 (unreleased)
+2.13.3 (2011-02-04)
 -------------------
 
 Features Added
@@ -18,6 +18,9 @@ Features Added
 Bugs Fixed
 ++++++++++
  
+- LP #713253: Prevent publication of acquired attributes, where the acquired
+  object does not have a docstring.
+
 
 2.13.2 (2011-01-19)
 -------------------

setup.py

@@ -23,7 +23,7 @@ if sys.platform[:3].lower() == "win":
 
 
 setup(name='Zope2',
-    version='2.13.3dev',
+    version='2.13.3',
     url='http://zope2.zope.org',
     license='ZPL 2.1',
     description='Zope2 application server / web framework',

src/ZPublisher/BaseRequest.py

@@ -126,11 +126,11 @@ class DefaultPublishTraverse(object):
                     # Again, clear any error status created by __bobo_traverse__
                     # because we actually found something:
                     request.response.setStatus(200)
-                    return subobject
                 except AttributeError:
                     pass
 
                 # Lastly we try with key access:
+                if subobject is None:
                     try:
                         subobject = object[name]
                     except TypeError: # unsubscriptable

src/ZPublisher/tests/testBaseRequest.py

@@ -335,6 +335,14 @@ class TestBaseRequest(unittest.TestCase, BaseRequest_factory):
         r = self._makeOne(root)
         self.assertRaises(NotFound, r.traverse, 'folder/objBasic/noview')
 
+    def test_traverse_acquired_attribute_without_docstring(self):
+        from ZPublisher import NotFound
+        root, folder = self._makeRootAndFolder()
+        root._setObject('objBasic',
+                        self._makeObjectWithEmptyDocstring())
+        r = self._makeOne(root)
+        self.assertRaises(NotFound, r.traverse, 'folder/objBasic')
+
     def test_traverse_class_without_docstring(self):
         from ZPublisher import NotFound
         root, folder = self._makeRootAndFolder()