PreParser: track variable declarations and parameters

test/mjsunit/lazy-inner-functions.js

Index: test/mjsunit/lazy-inner-functions.js
diff --git a/test/mjsunit/lazy-inner-functions.js b/test/mjsunit/lazy-inner-functions.js
index 3d8c448ce1976014728326d408327e8dc995f704..153a51a72c78ea0ed662d831dd91a6f2226091d0 100644
--- a/test/mjsunit/lazy-inner-functions.js
+++ b/test/mjsunit/lazy-inner-functions.js
@@ -2,11 +2,26 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// Flags: --lazy-inner-functions
+
 (function TestLazyInnerFunctionCallsEval() {
   var i = (function eager_outer() {
-    var a = 41; // Should be context-allocated
+    var outer_var = 41; // Should be context-allocated
+    function lazy_inner() {
+      return eval("outer_var");
+    }
+    return lazy_inner;
+  })();
+  assertEquals(41, i());
+})();
+
+(function TestLazyInnerFunctionDestructuring() {
+  var i = (function eager_outer() {
+    var outer_var = 41; // Should be context-allocated
     function lazy_inner() {
-      return eval("a");
+      // This introduces b and refers to outer_var.
+      var {outer_var : b} = {outer_var};
+      return b;
     }
     return lazy_inner;
   })();