End of Life Ruby 3.0 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →

class method

Gem.marshal_version

marshal_version

# File tmp/rubies/ruby-3.0.5/lib/rubygems.rb, line 663
def self.marshal_version
  "#{Marshal::MAJOR_VERSION}.#{Marshal::MINOR_VERSION}"
end

The version of the Marshal format for your Ruby.

See also .location_of_caller .needs .load_yaml .operating_system_defaults also in 4.1 · 4.0 · 3.4 · 3.3 · 3.2 · 3.1