test/langtools/tools/javac/generics/inference/7086586/T7086586b.java

/*
 * Copyright (c) 2011, 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.
 *
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 */

/*
 * @test
 * @bug 7086586 8033718
 *
 * @summary Inference producing null type argument; inference ignores capture
 *          variable as upper bound
 */
import java.util.List;

public class T7086586b {

    int assertionCount = 0;

    void assertTrue(boolean cond) {
        if (!cond) {
            throw new AssertionError();
        }
        assertionCount++;
    }

    <T> void m(List<? super T> dummy) { assertTrue(true); }
    <T> void m(Object dummy) { assertTrue(false); }

    void test(List<?> l) {
        m(l);
        assertTrue(assertionCount == 1);
    }

    public static void main(String[] args) {
        new T7086586b().test(null);
    }
}