Breaks to the debugger when a new instance of a class is accessed. Note that this function is deprecated.
break-new-instances-on-access class-designator &key read write slot-names when process trace-output entrycond eval-before before backtrace => t
The class to trap.
Causes a break when new instances of the class given by class-designator are accessed, according to the keyword arguments.
The keyword arguments control which type of access cause a break and are interpreted as described for trace-on-access.
this function is deprecated. You should now call trace-new-instances-on-access with
:break t instead.
LispWorks User Guide and Reference Manual - 20 Sep 2017