Magento 2 - What is the happen when run setup:di:complie

Question

When I run this command:

php bin/mangento setup:di:compile

It will throw the Error Exception below:

[ErrorException]
  Magento\Catalog\Controller\Adminhtml\Product\Initialization\Helper\Interceptor and Magento\Framework\Interc
  eption\Interceptor define the same property ($pluginLocator) in the composition of MyPool\AttrProduct\Controll
  er\Adminhtml\Product\Initialization\Helper\InterceptorCus. This might be incompatible, to improve maintaina
  bility consider using accessor methods in traits instead. Class was composed

Anybody know what this means and how to fix it?

content of file "InterceptorCus.php"

<?php
namespace MyPool\AttrProduct\Controller\Adminhtml\Product\Initialization\Helper;

/**
 * Interceptor class for @see
 * \Magento\Catalog\Controller\Adminhtml\Product\Initialization\Helper
 */
class InterceptorCus extends \Magento\Catalog\Controller\Adminhtml\Product\Initialization\Helper\Interceptor
{
    use \Magento\Framework\Interception\Interceptor;

    public function __construct(\Magento\Framework\App\RequestInterface $request, \Magento\Store\Model\StoreManagerInterface $storeManager, \Magento\Catalog\Controller\Adminhtml\Product\Initialization\StockDataFilter $stockFilter, \Magento\Catalog\Model\Product\Initialization\Helper\ProductLinks $productLinks, \Magento\Backend\Helper\Js $jsHelper, \Magento\Framework\Stdlib\DateTime\Filter\DateTime $dateFilter)
    {
        $this->___init();
        parent::__construct($request, $storeManager, $stockFilter, $productLinks, $jsHelper, $dateFilter);
    }

}

Answer 1

This message means that MyPool\AttrProduct\Controller\Adminhtml\Product\Initialization\Helper\InterceptorCus has properties that do the same thing more or less and can be incompatible with one another. Try to refactor the class.

If you can share gist link to the class in question we may be able to help more.

UPDATE: The issue is that the class you extend uses the same trait as your class:

    use \Magento\Framework\Interception\Interceptor;

Remove the use statement in MyPool\AttrProduct\Controller\Adminhtml\Product\Initialization\Helper\InterceptorCus and you should be fine