when we get an option's value, we need it's values to calculate properties (ie for mandatory's option)

if a disabled option has a callback to an other disabled value, it's raise ConfigError

now only raise if option has no other propertiesError

test/test_option_calculation.py

@@ -498,3 +498,14 @@ def test_callback_hidden():
     cfg.read_write()
     raises(PropertiesOptionError, 'cfg.od1.opt1')
     cfg.od2.opt2
+
+
+def test_callback_disable_make_dict():
+    opt1 = BoolOption('opt1', '', properties=('disabled',))
+    opt2 = BoolOption('opt2', '', callback=return_value, callback_params={'': (('od1.opt1', False),)}, properties=('disabled',))
+    od1 = OptionDescription('od1', '', [opt1])
+    od2 = OptionDescription('od2', '', [opt2])
+    maconfig = OptionDescription('rootconfig', '', [od1, od2])
+    cfg = Config(maconfig)
+    cfg.read_write()
+    raises(PropertiesOptionError, 'cfg.od1.opt1')

tiramisu/value.py

@@ -179,6 +179,7 @@ class Values(object):
         is_frozen = 'frozen' in setting[opt]
         # if value is callback and is not set
         # or frozen with force_default_on_freeze
+        config_error = None
         if opt.impl_has_callback() and (
                 self._is_default_owner(path) or
                 (is_frozen and 'force_default_on_freeze' in setting[opt])):
@@ -193,7 +194,11 @@ class Values(object):
                     no_value_slave = True
 
             if not no_value_slave:
+                try:
                     value = self._getcallback_value(opt)
+                except ConfigError as config_error:
+                    value = None
+                else:
                     if (opt.impl_is_multi() and
                             opt.impl_get_multitype() == multitypes.slave):
                         if not isinstance(value, list):
@@ -218,6 +223,8 @@ class Values(object):
             setting.validate_properties(opt, False, False, value=value, path=path,
                                         force_permissive=force_permissive,
                                         force_properties=force_properties)
+        if config_error is not None:
+            raise ConfigError(config_error)
         return value
 
     def __setitem__(self, opt, value):