These are the special variables that control the debugger action.
[Variable]
debug:* debug-print-level*
debug:*debug-print-length*
*print-level* and *print-length* are bound to these values during the execution of some debug commands. When evaluating arbitrary expressions in the debugger, the normal values of *print-level* and *print-length* are in effect. These variables are initially set to 3 and 5, respectively.
