Fix the order of context binding/simulate insertion for BlockContexts.

test/mjsunit/harmony/regress/regress-3741.js

Index: test/mjsunit/harmony/regress/regress-3741.js
diff --git a/test/mjsunit/harmony/regress/regress-3741.js b/test/mjsunit/harmony/regress/regress-3741.js
new file mode 100644
index 0000000000000000000000000000000000000000..8a9dd9e09c787f0e8cc752e947d3a1fdb8315ee5
--- /dev/null
+++ b/test/mjsunit/harmony/regress/regress-3741.js
@@ -0,0 +1,26 @@
+// Copyright 2014 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.
+//
+// Flags: --harmony-scoping --allow-natives-syntax
+'use strict';
+function f24(deopt) {
+  let x = 1;
+  {
+    let x = 2;
+    {
+      let x = 3;
+      assertEquals(3, x);
+    }
+    deopt + 1;
+    assertEquals(2, x);
+  }
+  assertEquals(1, x);
+}
+
+
+for (var j = 0; j < 10; ++j) {
+  f24(12);
+}
+%OptimizeFunctionOnNextCall(f24);
+f24({});