Merged revisions 72907 via svnmerge from

svn+ssh://pythondev@svn.python.org/python/trunk

........
  r72907 | benjamin.peterson | 2009-05-24 21:40:21 -0500 (Sun, 24 May 2009) | 1 line

  handle errors from _PyObject_LookupSpecial when __get__ fails
........

1 files changed, 10 insertions, 2 deletions

diff --git a/Objects/abstract.c b/Objects/abstract.c
index 56e5b71..3b2de9d 100644
--- a/Objects/abstract.c
+++ b/Objects/abstract.c
@@ -90,8 +90,12 @@ _PyObject_LengthHint(PyObject *o, Py_ssize_t defaultvalue)
 
 	/* try o.__length_hint__() */
         hintmeth = _PyObject_LookupSpecial(o, "__length_hint__", &hintstrobj);
-	if (hintmeth == NULL)
-		return defaultvalue;
+	if (hintmeth == NULL) {
+		if (PyErr_Occurred())
+			return -1;
+		else
+			return defaultvalue;
+	}
 	ro = PyObject_CallFunctionObjArgs(hintmeth, NULL);
 	Py_DECREF(hintmeth);
 	if (ro == NULL) {
@@ -2592,6 +2596,8 @@ PyObject_IsInstance(PyObject *inst, PyObject *cls)
 		}
 		return ok;
 	}
+	else if (PyErr_Occurred())
+		return -1;
 	return recursive_isinstance(inst, cls);
 }
 
@@ -2655,6 +2661,8 @@ PyObject_IsSubclass(PyObject *derived, PyObject *cls)
 		}
 		return ok;
 	}
+	else if (PyErr_Occurred())
+		return -1;
 	return recursive_issubclass(derived, cls);
 }