'use strict'; 
 | 
var defineBuiltIn = require('../internals/define-built-in'); 
 | 
var errorToString = require('../internals/error-to-string'); 
 | 
  
 | 
var ErrorPrototype = Error.prototype; 
 | 
  
 | 
// `Error.prototype.toString` method fix 
 | 
// https://tc39.es/ecma262/#sec-error.prototype.tostring 
 | 
if (ErrorPrototype.toString !== errorToString) { 
 | 
  defineBuiltIn(ErrorPrototype, 'toString', errorToString); 
 | 
} 
 |