How to use [log.error]

The reference page of log.error has its arguments, constraints and declaration.

The [log.error] and [log.fatal] slots give you the option of logging an exception stack trace, by parametrising your invocation with an [exception] argument, which will not be assumed to be meta information, but rather end up in the “exception” column as you create the log item. All other parameters will still be evaluated or used as meta information.