2017-04-04 10:40 GMT+02:00 Pavel Krivanek <pavel.krivanek@gmail.com>:

The undeclared mechanism is regularly used e.g. during loading of packages. So if we will do something like this, rather not for Pharo 6 :-)

Yes, But I am talking about runtime behaviour. It of course could fails kind of post load actions/initialization. But they will anyway fail (maybe silently) if expected variable is undeclared