Default value:

(or (< *delivery-level* 5) (delivery-value :keep-debug-mode))

If this is nil , functions for handling the top level read-eval-print loop are deleted. Note that this means that if the line based debugger is invoked, there is no way to communicate with it

Note: the top level history is cleared, regardless of the value of the :keep-top-level argument.

Affected by: :keep-debug-mode

LispWorks Delivery User Guide - 12 Sep 2005