Posted by naruse on 17 Nov 2025 We are pleased to announce the release of Ruby 4.0.0-preview2. Ruby 4.0 updates its Unicode version to 17,0.0, and so on. Language changes *nil no longer calls nil.to_a, similar to how **nil does not call nil.to_hash. [[Feature #21047]] Core classes updates Note: We’re only listing notable updates of Core class. Binding Binding#local_variables does no longer include numbered parameters. Also, Binding#local_variable_get and Binding#local_variable_set reject to han...