Stack allocate lexical locals + hoist stack slots

test/mjsunit/bugs/harmony/debug-blockscopes.js

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 34 matching lines @@
 // Debug event listener which delegates.
 function listener(event, exec_state, event_data, data) {
   try {
     if (event == Debug.DebugEvent.Break) {
       break_count++;
       listener_called = true;
       listener_delegate(exec_state);
     }
   } catch (e) {
     exception = e;
+    print(e + e.stack);
   }
 }
 
 // Add the debug event listener.
 Debug.setListener(listener);
 
 
 // Initialize for a new test.
 function BeginTest(name) {
   test_name = name;
@@ skipping 142 matching lines @@
   CheckScopeChain([debug.ScopeType.Local,
                    debug.ScopeType.Block,
                    debug.ScopeType.Closure,
                    debug.ScopeType.Global], exec_state);
   CheckScopeContent({}, 0, exec_state);
   CheckScopeContent({z:4}, 1, exec_state);
   CheckScopeContent({a:1,x:2,y:3}, 2, exec_state);
 };
 closure_1(1)();
 EndTest();