M2.1.2 Cannot rewrite Magento\ConfigurableProduct\Block\Product\View\Type\Configurable

[kanduvisla]

This might have some similarities with #4400, but I cannot seem to rewrite Magento\ConfigurableProduct\Block\Product\View\Type\Configurable using di.xml

Preconditions

1. Version 2.1.2

Steps to reproduce

1. Create a di.xml with:

<preference for="Magento\ConfigurableProduct\Block\Product\View\Type\Configurable"
            type="Vendor\Module\Rewrite\Magento\ConfigurableProduct\Block\Product\View\Type\Configurable"/>

2. Create the class Vendor\Module\Rewrite\Magento\ConfigurableProduct\Block\Product\View\Type\Configurable:

class Configurable extends \Magento\ConfigurableProduct\Block\Product\View\Type\Configurable
{
    /**
     * Override the template.
     * @return string
     */
    protected function _toHtml()
    {
        die;
        return parent::_toHtml();
    }
}

Expected result

1. It should die().

Actual result

1. It does not.

[mamsincl]

Any update? I face the same issue with version 2.1.3 ( try to inject extra bits of data into getJsonConfig() method)

[magento-engcom-team]

@kanduvisla, thank you for your report.
We were not able to reproduce this issue by following the steps you provided. If you'd like to update it, please reopen the issue.
We tested the issue on 2.3.0-dev, 2.2.0, 2.1.9