test/tools/javac/generics/T6869075.java

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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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/*
 * @test
 * @bug     6869075
 * @summary regression: javac crashes when compiling compound string assignment with generics
 * @author mcimadamore
 */

public class T6869075 {

    static class Foo<X> {
        X x;
        Foo (X x) {
            this.x = x;
        }
    }

    static void test1(Foo<String> foo) {
        String start = foo.x;
        equals(foo.x += "foo", start + "foo");
    }

    static void test2(Foo<String> foo) {
        String start = foo.x;
        equals((foo.x += "foo"), (start + "foo"));
    }

    static void test3(Foo<String> foo) {
        String start = foo.x;
        equals(((foo.x += "foo")), ((start + "foo")));
    }

    public static void main(String[] args) {
        test1(new Foo<String>("Hello!"));
        test2(new Foo<String>("Hello!"));
        test3(new Foo<String>("Hello!"));
    }

    static void equals(String found, String req) {
        if (!found.equals(req)) {
            throw new AssertionError("Error (expected: "+ req +
                                     " - found: " + found + ")");
        }
    }
}