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

 *

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

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * 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

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/**

 * @test

 * @bug 8058199

 * @summary Code generation problem with javac skipping a checkcast instruction

 */

public class T8058199 {

    final static String SYNTHETIC_CAST_TYPE = "[Ljava.lang.String;";

    @SuppressWarnings("unchecked")

    <Z> Z[] makeArr(Z z) { return (Z[])new Object[1]; }

    <U> void check(U u) { }

    void testMethod() {

        test(() -> check(makeArr("")));

    }

    void testNewDiamond() {

        class Check<X> {

            Check(X x) { }

        }

        test(()-> new Check<>(makeArr("")));

    }

    void testNewGeneric() {

        class Check {

            <Z> Check(Z z) { }

        }

        test(()-> new Check(makeArr("")));

    }

    private void test(Runnable r) {

        try {

            r.run();

            throw new AssertionError("Missing synthetic cast");

        } catch (ClassCastException cce) {

            if (!cce.getMessage().contains(SYNTHETIC_CAST_TYPE)) {

                throw new AssertionError("Bad type in synthetic cast", cce);

            }

        }

    }

    public static void main(String[] args) {

        T8058199 test = new T8058199();

        test.testMethod();

        test.testNewDiamond();

        test.testNewGeneric();

    }

}