Return None for .name of enum if no name for value.

This fixes segfaults when trying to get the name of a dead key
from a qt key event.

Change-Id: Ie631e2245bca0a3fee8616854f6479d3dec0c2bb
Reviewed-by: Roman Lacko <[email protected]>
Reviewed-by: John Cummings <[email protected]>

libshiboken/sbkenum.cpp

@@ -76,8 +76,13 @@ static int SbkEnumObject_print(PyObject* self, FILE* fp, int)
 
 static PyObject* SbkEnumObject_name(PyObject* self, void*)
 {
-    Py_INCREF(((SbkEnumObject*)self)->ob_name);
-    return ((SbkEnumObject*)self)->ob_name;
+    SbkEnumObject* enum_self = (SbkEnumObject*)self;
+
+    if (enum_self->ob_name == NULL)
+        Py_RETURN_NONE;
+
+    Py_INCREF(enum_self->ob_name);
+    return enum_self->ob_name;
 }
 
 static PyObject* SbkEnum_tp_new(PyTypeObject* type, PyObject* args, PyObject* kwds)

tests/samplebinding/enum_test.py

@@ -136,6 +136,11 @@ def testValue(self):
         e = MyEvent()
         self.assertEqual(repr(e.eventType()), 'sample.Event.EventType(999)')
 
+    def testNoneName(self):
+        e = MyEvent()
+        t = e.eventType()
+        self.assertEqual(t.name, None)
+
 class EnumOverloadTest(unittest.TestCase):
     '''Test case for overloads involving enums'''