Debug logging in Formula scripts

[rouhu]

This is how I made it. I created a new varchar field "message" which is updated with the validation error message in the manual workflow. It...

[rouhu]

I figured out I can do this and it works:
log\warning(string\lowerCase($request_id));

[rouhu]

Has anyone figured out how to log variable values with the logging functions. For example, I am trying to get user id printed in log.
$user_id=env\userAttribute('id');...