Use a different map to distinguish eval contexts

test/mjsunit/regress/regress-5295-2.js

Index: test/mjsunit/regress/regress-5295-2.js
diff --git a/test/mjsunit/regress/regress-5295-2.js b/test/mjsunit/regress/regress-5295-2.js
new file mode 100644
index 0000000000000000000000000000000000000000..9f97562d6fed7baf62d57d4770d6d85ea09965b2
--- /dev/null
+++ b/test/mjsunit/regress/regress-5295-2.js
@@ -0,0 +1,20 @@
+// Copyright 2016 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: --test-small-max-function-context-stub-size
+
+// Generate an eval scope with a very large closure.
+// Ensure that vars are leaked out properly in this case.
+source = "var x;";
+for (var i = 0; i < 11; i++) {
+  source += "  let a_" + i + " = 0;\n";
+}
+source += "  (function () {\n"
+for (var i = 0; i < 11; i++) {
+  source += "a_" + i + "++;\n";
+}
+source += "})();\n"
+
+eval(source);
+assertEquals(undefined, x);