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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
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 * 2 along with this work; if not, write to the Free Software Foundation,
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/**
 * JDK-8011749: Bugs with empty character class handling
 *
 * @test
 * @run
 */

// empty class in alternative
print(/[]|[^]/.exec("a"));
print(/[]|[]/.test("a"));
print(/[]|[]|[a]/.exec("a"));

// empty class in negative lookahead
print(/(?![])/.test(""));
print(/(?![])./.exec("a"));