Preparse inner functions (new try)

test/mjsunit/debug-function-scopes.js

 // Copyright 2012 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 69 matching lines @@
 CheckScope(mirror.scope(0), {}, ScopeType.Script);
 CheckScope(mirror.scope(1), {}, ScopeType.Global);
 
 var f3 = (function F1(invisible_parameter) {
   var invisible1 = 1;
   var visible1 = 10;
   return (function F2() {
     var invisible2 = 2;
     return (function F3() {
       var visible2 = 20;
-      var invisible2 = 3;

[adamk, 2016/09/23 18:21:30]

I take it this now becomes visible?

       return (function () {return visible1 + visible2 + visible1a;});
     })();
   })();
 })(5);
 
 var mirror = Debug.MakeMirror(f3);
 
 assertEquals(4, mirror.scopeCount());
 
 CheckScope(mirror.scope(0), { visible2: 20 }, ScopeType.Closure);
@@ skipping 47 matching lines @@
 
 
 function CheckNoScopeVisible(f) {
   var mirror = Debug.MakeMirror(f);
   assertEquals(0, mirror.scopeCount());
 }
 
 CheckNoScopeVisible(Number);
 
 CheckNoScopeVisible(Function.toString);