This section describes some states that were not designed to be useful but which are not prevented.

Exceptional Gates

If a resume key is used to an available domain {this may occur if a node key to a domain root is used to change C13}, the effect upon the jumper is as if the jumpee had been busy. There is no effect upon the jumpee. No resume keys are deleted.

If a gate key to a malformed domain {(p1,malform)} is invoked, the effect is as if the key were a data key, except no string is returned. There is no effect upon the domain. No resume keys are deleted.

If a return key to a running domain is used, the arguments may be deposited in the domain {according to the domain's current "entry block" in floating register 2}, and there will remain just one process in the domain. If any resume key is used to a running domain, that domain may lose its place on some queue.

The nodes of the jumper's domain should be distinct from the nodes of the jumpee's domain. If this is not the case the jumper will acquire a trap code and the trap action will happen in place of the indicated jump. See (p1,worsejump).

Domains will never overlap with the current design of space banks and domain creators.