[ignition] Fix building lookup graph when search depth is 0

test/mjsunit/regress/regress-crbug-652186-global.js

Index: test/mjsunit/regress/regress-crbug-652186-global.js
diff --git a/test/message/destructuring-modify-const.js b/test/mjsunit/regress/regress-crbug-652186-global.js
similarity index 71%
copy from test/message/destructuring-modify-const.js
copy to test/mjsunit/regress/regress-crbug-652186-global.js
index 5575ae9267606b3ccf036f2c5edae19262b1c78a..0e869e2ff002839e07e8bba94ad5e8797aa16124 100644
--- a/test/message/destructuring-modify-const.js
+++ b/test/mjsunit/regress/regress-crbug-652186-global.js
@@ -2,8 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-//
-'use strict';
+// Flags: --always-opt
 
-const { x : x, y : y } = { x : 1, y : 2 };
-x++;
+x = 1;
+print(eval("eval('var x = 2'); x;"));