nashorn/test/script/basic/JDK-8073868.js

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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
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 * 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-8073868: Regex matching causes java.lang.ArrayIndexOutOfBoundsException: 64
 *
 * @test
 * @run
 */

function test(input) {
    var comma = input.indexOf(",");
    Assert.assertEquals(/([^\s]+),(.*)+/.exec(input)[0], input.trimLeft());
    Assert.assertEquals(/([^\s]+),(.*)+/.exec(input)[1], input.substring(0, comma).trimLeft());
    Assert.assertEquals(/([^\s]+),(.*)+/.exec(input)[2], input.substring(comma + 1));
    Assert.assertEquals(/(.*)+/.exec(input)[0], input);
    Assert.assertEquals(/(.*)+/.exec(input)[1], input);
}

test(" xxxx,         xxx xxxxxx xxxxxxxxx xxxxxxx, xxxx xxxxx xxxxx ");
test(" xxxx, xxx xxxxxx xxxxxxxxx xxxxxxx, xxxx xxxxx xxxxx ");
test("x,         xxxxxxxxxx xxxxxxxxx xxxxxxx, xxxx xxxxx xxxxx ");

Assert.assertEquals(/(?:\1a|())*/.exec("a")[0], "a");
Assert.assertEquals(/(?:\1a|())*/.exec("a")[1], undefined);