ParseError is not being logged

Hello,

dblog and filelog modules work a bit differently. dblog simply writes errors to a database, but filelog not only logs errors to a file, it also formats them using token module's functionality. This means that all modules providing tokens for this module must do it absolutely without errors.

In your case, you changed not just any file, but a Drupal core file, which is necessary for the entities to function. As a result, this https://git.drupalcode.org/project/filelog/-/blame/2.0.x/filelog.tokens....
causes an issue described here.
When incorrect syntax is used outside the core, there is no behavior like this.

Since it is assumed that core files will never have the parse issue specified here, I'm not sure if this can be interpreted as an bug and if it makes sense to change it.

If you frequently encounter parsing issues within the core, a workaround could be using the [user:uid] token instead [log:user] inside format string.

If someone believe it is issue please change status.