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

class method

Gem.spec_cache_dir

spec_cache_dir

# File tmp/rubies/ruby-3.0.5/lib/rubygems.rb, line 424
def self.spec_cache_dir
  paths.spec_cache_dir
end

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See also .sources= .suffixes .sources .suffix_pattern also in 4.1 · 4.0 · 3.4 · 3.3 · 3.2 · 3.1