better error msg

tiramisu/option/baseoption.py

@@ -362,6 +362,12 @@ class BaseOption(Base):
             if not isinstance(value, unicode) and not isinstance(value, str):
                 return ValueError(_('invalid unicode or string'))
 
+    def impl_get_display_name(self):
+        name = self.impl_getdoc()
+        if name is None or name == '':
+            name = self.impl_getname()
+        return name
+
 
 class OnlyOption(BaseOption):
     __slots__ = tuple()
@@ -633,12 +639,6 @@ class Option(OnlyOption):
         "accesses the Option's doc"
         return self.impl_get_information('doc')
 
-    def impl_get_display_name(self):
-        name = self.impl_getdoc()
-        if name is None or name == '':
-            name = self.impl_getname()
-        return name
-
     def _valid_consistencies(self, other_opts, init=True):
         if self._is_subdyn():
             dynod = self._impl_getsubdyn()
@@ -906,7 +906,6 @@ def validate_requires_arg(multi, requires, name):
                                             inverse, transitive, same_action)
         else:
             ret_requires[action][option][1].append(expected)
-        option._set_has_dependency()
     # transform dict to tuple
     ret = []
     for opt_requires in ret_requires.values():