Gem::Installer#assign_content_address

# File tmp/rubies/ruby-4.1.0-preview1/lib/rubygems/installer.rb, line 985
def assign_content_address
  address = @package.content_address
  expected = options[:content_address]

  if expected && address != expected
    raise Gem::InstallError, "content address mismatch for #{spec.full_name}: " \
      "expected #{expected}, got #{address || "no content address"}"
  end

  @gem_dir = nil if address != spec.content_address
  spec.content_address = address
end