diff -r 000000000000 -r 6474c204b198 js/src/tests/ecma_5/extensions/uneval-strict-functions.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/ecma_5/extensions/uneval-strict-functions.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,61 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ */
+
+/* Check that strict mode functions get decompiled properly. */
+function lenient() { return typeof this == "object"; }
+assertEq(eval(uneval(lenient) + "lenient;")(), true);
+
+function strict()  { 'use strict'; return typeof this == "undefined"; }
+print(uneval(strict));
+assertEq(eval(uneval(strict) + "strict;")(), true);
+
+function lenient_outer() {
+    function lenient_inner() {
+        return typeof this == "object";
+    }
+    return lenient_inner;
+}
+assertEq(eval(uneval(lenient_outer()) + "lenient_inner;")(), true);
+
+function strict_outer() {
+    "use strict";
+    function strict_inner() {
+        return typeof this == "undefined";
+    }
+    return strict_inner;
+}
+assertEq(eval(uneval(strict_outer()) + "strict_inner;")(), true);
+
+function lenient_outer_closure() {
+    return function lenient_inner_closure() { 
+               return typeof this == "object"; 
+           };
+}
+assertEq(eval(uneval(lenient_outer_closure()))(), true);
+
+function strict_outer_closure() {
+    "use strict";
+    return function strict_inner_closure() { 
+               return typeof this == "undefined"; 
+           };
+}
+assertEq(eval(uneval(strict_outer_closure()))(), true);
+
+function lenient_outer_expr() {
+    return function lenient_inner_expr() (typeof this == "object");
+}
+assertEq(eval(uneval(lenient_outer_expr()))(), true);
+
+/*
+ * This doesn't work, because we have no way to include strict mode
+ * directives in expression closures.
+ *
+ *   function strict_outer_expr() {
+ *       return function strict_inner_expr() (typeof this == "undefined");
+ *   }
+ *   assertEq(eval(uneval(strict_outer_expr()))(), true);
+ */
+
+reportCompare(true, true);