illuminate/container bug report

[dishcheng]

• Laravel Version: 6.x
• PHP Version: 7.2.x

Description:

illuminate/container@aa6e703

when I use resource route and use controller method

  /**
     * @param $productCode
     */
    public function show($productCode)
    {
       return $productCode;
    }

will throw Unable to resolve dependency [Parameter #0 [ <required> $productCode ]] in class App\\Http\\Controllers\\Api\\Customer\\Product\\ProductSellController

Steps To Reproduce: