Ran into this error today when I updated a production site that uses roots 6.5.x to WP 4.3.
Notice: The called constructor method for WP_Widget is deprecated since version 4.3.0! Use
instead. in /var/www/dev.ecotrust.org/wordpress/wp-includes/functions.php on line 3457
Thought I’d share the solution here in case anyone else runs into it. As you can see, WP doesn’t actually give you any sort of trace.
$this->WP_Widget('widget_roots_vcard', __('Roots: vCard', 'roots'), $widget_ops);
parent::__construct('widget_roots_vcard', __('Roots: vCard', 'roots'), $widget_ops);
Seems to work just fine.
More info from the WP team here for the curious: https://gist.github.com/chriscct7/d7d077afb01011b1839d