/*

 * Copyright (c) 2009, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * 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).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

/*

 * @test

 * @bug 6855164

 * @summary SIGSEGV during compilation of method involving loop over CharSequence

 *

 * @run main/othervm -Xbatch compiler.loopopts.Test6855164

 */

package compiler.loopopts;

public class Test6855164 {

    public static void main(String[] args) throws Exception {

        StringBuffer builder = new StringBuffer();

        for(int i = 0; i < 100; i++)

            builder.append("I am the very model of a modern major general\n");

        for(int j = 0; j < builder.length(); j++){

            previousSpaceIndex(builder, j);

        }

    }

    private static final int previousSpaceIndex(CharSequence sb, int seek) {

        seek--;

        while (seek > 0) {

            if (sb.charAt(seek) == ' ') {

                while (seek > 0 && sb.charAt(seek - 1) == ' ')

                    seek--;

                return seek;

            }

            seek--;

        }

        return 0;

    }

}