Bug Report

Expected Behaviour

When using autoloaders (and/or bootstrap files), it seems that --debug behaves differently than non-debug.
I'm getting an error (originating from phpstan) for ...was not found while trying to analyse it..., but when I run with --debug it works without error.

There seems to be something wrong if --debug alters the programs behavior in anything except displayed output.
Is it possible, that using --debug disabled parallel processing? bc that could be the reason for the issue (since I don't get the error when I disable parallel processing)