Error when saving a section that contains an oembed field (PHP 7.2)

[twiro]

Whenever I try to save a section that contains an oembed field in a project that is running under PHP 7.2 I get the following error:

Symphony Warning: count(): Parameter must be an array or an object that implements Countable

An error occurred in …/extensions/oembed_field/fields/field.oembed.php around line 366

365 // Permit only some specific drivers
366 $settings['driver'] = empty($drivers) || count($drivers) < 0 ? null : $drivers;

The section seems to save mostly correctly though, but I can only manage one oembed driver to get saved…

[twiro]

I forgot – Setup is latest Symphony and latest Oembed field!

[mblabs]

Not sure, but try to replace with this:

$settings['driver'] = empty($drivers) || (($drivers instanceof Countable) && count($drivers)) < 0 ? null : $drivers;