Literally, this is showing up in irb and in my application code. Suddenly ruby 3.0.0 is no longer recognizing Boolean

This worked a few weeks ago, it must have appeared after an OS update

$ irb
3.0.0 :001 > String
 => String 
3.0.0 :002 > Boolean
Traceback (most recent call last):
        4: from /Users/aronlilland/.rvm/rubies/ruby-3.0.0/bin/irb:23:in `<main>'
        3: from /Users/aronlilland/.rvm/rubies/ruby-3.0.0/bin/irb:23:in `load'
        2: from /Users/aronlilland/.rvm/rubies/ruby-3.0.0/lib/ruby/gems/3.0.0/gems/irb-1.3.0/exe/irb:11:in `<top (required)>'
        1: from (irb):2:in `<main>'
NameError (uninitialized constant Boolean)

env

• ruby 3.0.0p0 (2020-12-25 revision 95aff21468) [x86_64-darwin21]
• rvm 1.29.12 (latest) by Michal Papis, Piotr Kuczynski, Wayne E. Seguin [https://rvm.io]
• MacOS 12.5.1 (2.4 GHz 8-Core Intel Core i9 processor)

Troubleshooting steps already taken:

• uninstalled and reinstalled using RVM rvm uninstall 3.0.0 then rvm install 3.0.0

CodePudding user response：

Ruby has never had a Boolean type. The Boolean constants true and false are, respectively, of types TrueClass and FalseClass, and both inherit directly from Object. There is not, and has never been, a type called Boolean in core Ruby.