@iau

I added additional argument system that the external function can take, and with this fixed the DoS vulnerability of self-referencing (recursive) object by restricting the recursiveness of the execution (As a note, NonRecoverable just mean automatic rollback at the machine level cannot be done, but you can rollback to an older version of the machine and it would work :))

I added feature flag for std (default to be on) where it will depends on std only if the feature is on, or otherwise alternative code is used if std isn’t presence.

Welcome to Stardance!