diff -r 000000000000 -r 6474c204b198 js/src/tests/ecma_5/misc/unicode-escaped-keyword.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/ecma_5/misc/unicode-escaped-keyword.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,22 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ */
+
+function throws(code) {
+    var type;
+    try {
+        eval(code);
+    } catch (ex) {
+        type = ex.name;
+    }
+    assertEq(type, 'SyntaxError');
+}
+
+var s = '\\u0073';
+throws('var thi' + s);
+throws('switch (' + s + 'witch) {}')
+throws('var ' + s + 'witch');
+
+if (typeof reportCompare == 'function')
+    reportCompare(true, true);