There's some discussion about removing callcc from the language here: https://bugs.ruby-lang.org/issues/10548 https://bugs.ruby-lang.org/issues/10548 It looks

There's some discussion about removing callcc from the language here: https://bugs.ruby-lang.org/issues/10548 https://bugs.ruby-lang.org/issues/10548 It looks like it's still included at the moment, though: http://ruby-doc.org/core-2.6.1/Kernel.html#method-i-callcc http://ruby-doc.org/core-2.6.1/Kernel.html#method-i-callcc