From: Ryan Rusaw <address@hidden>
Updated.

diff --git a/src/ChangeLog b/src/ChangeLog
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,12 @@
+2010-01-27  Ryan Rusaw  <address@hidden>
+
+	* pt-eval.cc (tree_evaluator::do_breakpoint): Call do_keyboard_impl instead
+	of do_keyboard.
+	(tree_evaluator: do_keyboard_impl): and set the default to call do_keyboard.
+
+	* pt-eval.h (tree_evaluator): Added virtual do_keyboard_impl method, so that 
+	subclasses may override control flow in debug mode.
+
 2010-01-27  Jaroslav Hajek  <address@hidden>
 
 	* pt-eval.cc (do_unwind_protect_cleanup_code): Save
diff --git a/src/pt-eval.cc b/src/pt-eval.cc
--- a/src/pt-eval.cc
+++ b/src/pt-eval.cc
@@ -1154,7 +1154,14 @@
     }
 
   if (break_on_this_statement)
-    do_keyboard ();
+    do_keyboard_impl ();
+
+}
+
+octave_value
+tree_evaluator::do_keyboard_impl (const octave_value_list& args) const
+{
+	return do_keyboard(args);
 }
 
 DEFUN (silent_functions, args, nargout,
diff --git a/src/pt-eval.h b/src/pt-eval.h
--- a/src/pt-eval.h
+++ b/src/pt-eval.h
@@ -163,6 +163,9 @@
   void do_breakpoint (bool is_breakpoint,
 		      bool is_end_of_fcn_or_script = false) const;
 
+  virtual octave_value do_keyboard_impl (
+		  const octave_value_list& args = octave_value_list ()) const;
+
   // No copying!
 
   tree_evaluator (const tree_evaluator&);