# File lib/rubygems/specification.rb, line 432 def Specification.from_yaml(input) input = normalize_yaml_input(input) spec = YAML.load(input) if(spec && spec.class == FalseClass) then raise Gem::EndOfYAMLException end unless Specification === spec raise Gem::Exception, "YAML data doesn't evaluate to gem specification" end unless spec.instance_variables.include? '@specification_version' and spec.instance_variable_get :@specification_version spec.instance_variable_set :@specification_version, NONEXISTENT_SPECIFICATION_VERSION end spec end