+ (format *debug-io* "~&Not currently single-stepping. (Use START to activate the single-stepper)~%"))))
+
+(def-step-command "STEP" step-into)
+(def-step-command "NEXT" step-next)
+(def-step-command "STOP" step-continue)
+
+(!def-debug-command-alias "S" "STEP")
+(!def-debug-command-alias "N" "NEXT")
+
+(!def-debug-command "OUT" ()
+ (if (typep *debug-condition* 'step-condition)
+ (if sb!impl::*step-out*
+ (let ((restart (find-restart 'step-out *debug-condition*)))
+ (aver restart)
+ (invoke-restart restart))
+ (format *debug-io* "~&OUT can only be used step out of frames that were originally stepped into with STEP.~%"))
+ (format *debug-io* "~&Not currently single-stepping. (Use START to activate the single-stepper)~%")))