whole_func_string: function SetUpError(error_function) {
    %FunctionSetInstanceClassName(error_function, 'Error');
    var name = error_function.name;
    var prototype = new GlobalObject();
    if (name !== 'Error') {
      %InternalSetPrototype(error_function, GlobalError);
      %InternalSetPrototype(prototype, GlobalError.prototype);
    }
    %FunctionSetPrototype(error_function, prototype);
  
    %AddNamedProperty(error_function.prototype, 'name', name, DONT_ENUM);
    %AddNamedProperty(error_function.prototype, 'message', '', DONT_ENUM);
    %AddNamedProperty(
        error_function.prototype, 'constructor', error_function, DONT_ENUM);
  
    %SetCode(error_function, function(m) {
      if (IS_UNDEFINED(new.target)) return new error_function(m);
  
      try { captureStackTrace(this, error_function); } catch (e) { }
      // Define all the expected properties directly on the error
      // object. This avoids going through getters and setters defined
      // on prototype objects.
      if (!IS_UNDEFINED(m)) {
        %AddNamedProperty(this, 'message', TO_STRING(m), DONT_ENUM);
      }
    });
  
    %SetNativeFlag(error_function);
    return error_function;
  }
func_code_string: function SetUpError(error_function) {
    %FunctionSetInstanceClassName(error_function, 'Error');
    var name = error_function.name;
    var prototype = new GlobalObject();
    if (name !== 'Error') {
      %InternalSetPrototype(error_function, GlobalError);
      %InternalSetPrototype(prototype, GlobalError.prototype);
    }
    %FunctionSetPrototype(error_function, prototype);
  
    %AddNamedProperty(error_function.prototype, 'name', name, DONT_ENUM);
    %AddNamedProperty(error_function.prototype, 'message', '', DONT_ENUM);
    %AddNamedProperty(
        error_function.prototype, 'constructor', error_function, DONT_ENUM);
  
    %SetCode(error_function, function(m) {
      if (IS_UNDEFINED(new.target)) return new error_function(m);
  
      try { captureStackTrace(this, error_function); } catch (e) { }
      // Define all the expected properties directly on the error
      // object. This avoids going through getters and setters defined
      // on prototype objects.
      if (!IS_UNDEFINED(m)) {
        %AddNamedProperty(this, 'message', TO_STRING(m), DONT_ENUM);
      }
    });
  
    %SetNativeFlag(error_function);
    return error_function;
  }
func_documentation_string: Set up special error type constructors.