Irregexp:...

test/mjsunit/regexp-UC16.js

 // Copyright 2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 23 matching lines @@
             "\\1 ASCII, string short");
 assertTrue(/\u03a3((?:))\1\1x/i.test("\u03c2x"), "backref-UC16-empty");
 assertTrue(/x(?:...|(...))\1x/i.test("x\u03a3\u03c2\u03c3x"),
            "backref-UC16-uncaptured");
 assertTrue(/x(?:...|(...))\1x/i.test("x\u03c2\u03c3\u039b\u03a3\u03c2\u03bbx"),
            "backref-UC16-backtrack");
 var longUC16String = "x\u03a3\u03c2\u039b\u03c2\u03c3\u03bb\u03c3\u03a3\u03bb";
 assertEquals(longUC16String + "," + longUC16String.substring(1,4),
              String(/x(...)\1\1/i.exec(longUC16String)),
              "backref-UC16-twice");
+
+assertFalse(/\xc1/i.test('fooA'), "quickcheck-uc16-pattern-ascii-subject");
+assertFalse(/[\xe9]/.test('i'), "charclass-uc16-pattern-ascii-subject");
+assertFalse(/\u5e74|\u6708/.test('t'), "alternation-uc16-pattern-ascii-subject");