2009/4/19 Lukas Renggli <renggli at gmail.com>: > I don't think this is a problem, because all supported versions of > Squeak (Pharo, Squeak 3.8, Squeak 3.9, Squeak 3.10) have a class > called BlockClosure. In most cases it is simply used. I see, I thought that NewCompiler / ClosureVM would add that. Cheers Philippe