Debugger: fix stepping next with trycatch recursion

src/debug.h

Index: src/debug.h
diff --git a/src/debug.h b/src/debug.h
index d39ea4e3e92a549e0e20f7b9b9a8e48099881023..22c0ed2098c00f19156f569da4199a14402f0aa6 100644
--- a/src/debug.h
+++ b/src/debug.h
@@ -506,6 +506,12 @@ class Debug {
     // Frame pointer from last step next action.
     Address last_fp_;
 
+    // Step action for queued step that needs to be performed.
+    StepAction queued_step_action_;
+
+    // Number of queued steps left to perform before debug event.
+    int queued_step_count_;
+
     // Frame pointer for frame from which step in was performed.
     Address step_into_fp_;