class RBS::InstanceVariableDuplicationError::ClassInstanceVariableDuplicationError::TypeParamDefaultReferenceError

# File bundled-src/rbs-3.10.0/lib/rbs/errors.rb, line 616
def self.check!(type_params)
  if errors = AST::TypeParam.validate(type_params)
    error = errors[0] or raise
    error.default_type or raise
    raise new(error, location: error.default_type.location)
  end
end

# File bundled-src/rbs-3.10.0/lib/rbs/errors.rb, line 610
def initialize(type_param, location:)
  super "#{Location.to_string(location)}: the default of #{type_param.name} cannot include optional type parameter"
  @location = location
  @type_param = type_param
end