mandatories masterslaves with consistency and default value is acceptable

test/test_option_consistency.py

@@ -753,3 +753,15 @@ def test_consistency_warnings_error():
     with warnings.catch_warnings(record=True) as w:
         raises(ValueError, "cfg.a = 1")
     assert w == []
+
+
+def test_consistency_network_netmask_mandatory():
+    a = NetworkOption('a', '', multi=True, properties=('mandatory',), default=[u'0.0.0.0'])
+    b = NetmaskOption('b', '', multi=True, properties=('mandatory',), default_multi=u'0.0.0.0')
+    od = OptionDescription('a', '', [a, b])
+    od.impl_set_group_type(groups.master)
+    b.impl_add_consistency('network_netmask', a)
+    c = Config(od)
+    c.read_only()
+    c.cfgimpl_get_settings().remove('mandatory')
+    c.make_dict()