old_contents: /*
  	MIT License http://www.opensource.org/licenses/mit-license.php
  	Author Jarid Margolin @jaridmargolin
  */
  "use strict";
  
  module.exports = class WebpackError extends Error {
  	constructor(message) {
  		super(message);
  		this.name = 'WebpackError';
  		this.message = message;
  		Error.captureStackTrace(this, this.constructor);
  
  		/** @type {string} */
  		this.details = undefined;
  	}
  
  	inspect() {
  		return this.stack + (this.details ? `\n${this.details}` : "");
  	}
  };
  
new_contents: /*
  	MIT License http://www.opensource.org/licenses/mit-license.php
  	Author Jarid Margolin @jaridmargolin
  */
  "use strict";
  
  module.exports = class WebpackError extends Error {
  	constructor(message) {
  		super(message);
  
  		this.message = message;
  		Error.captureStackTrace(this, this.constructor);
  	}
  
  	get details() {}
  
  	inspect() {
  		return this.stack + (this.details ? `\n${this.details}` : "");
  	}
  };
  
subject: make it a getter so tests pass