Parse eagerly inside block scopes.

test/mjsunit/regress/regress-4255-2.js

Index: test/mjsunit/regress/regress-4255-2.js
diff --git a/test/mjsunit/regress/regress-4255-2.js b/test/mjsunit/regress/regress-4255-2.js
new file mode 100644
index 0000000000000000000000000000000000000000..bae82be5120099d024996f30823db5c47446dc11
--- /dev/null
+++ b/test/mjsunit/regress/regress-4255-2.js
@@ -0,0 +1,24 @@
+// Copyright 2015 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// comments to trigger lazy compilation comments to trigger lazy compilation
+// comments to trigger lazy compilation comments to trigger lazy compilation
+// comments to trigger lazy compilation comments to trigger lazy compilation
+// comments to trigger lazy compilation comments to trigger lazy compilation
+// comments to trigger lazy compilation comments to trigger lazy compilation
+// comments to trigger lazy compilation comments to trigger lazy compilation
+// comments to trigger lazy compilation comments to trigger lazy compilation
+// comments to trigger lazy compilation comments to trigger lazy compilation
+// comments to trigger lazy compilation comments to trigger lazy compilation
+// comments to trigger lazy compilation comments to trigger lazy compilation
+// comments to trigger lazy compilation comments to trigger lazy compilation
+// comments to trigger lazy compilation comments to trigger lazy compilation
+// comments to trigger lazy compilation comments to trigger lazy compilation
+// comments to trigger lazy compilation comments to trigger lazy compilation
+// comments to trigger lazy compilation comments to trigger lazy compilation
+
+'use strict';
+for (let i = function f() {}; !i;);
+  // Trigger OSR.
+for (var i = 0; i < 1000000; i++);