I am using doctrine and class metadata caching. All is fine except I get this warning

PHP Warning: Undefined array key 0 in /app/vendor/predis/predis/src/Command/Command.php on line 107

This is a normal warning because when I go through this line of code I see for example:

So there is no $arguments[0]:

This is the call stack:

It can be fixed by checking if isset first.

Relevant issue I created in Doctrine: doctrine/orm#8653

They replied that is an error on Predis side. I could add a merge request with an isset first. Just let me know.