1 /*
 2  * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
 3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 4  *
 5  * This code is free software; you can redistribute it and/or modify it
 6  * under the terms of the GNU General Public License version 2 only, as
 7  * published by the Free Software Foundation.
 8  *
 9  * This code is distributed in the hope that it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12  * version 2 for more details (a copy is included in the LICENSE file that
13  * accompanied this code).
14  *
15  * You should have received a copy of the GNU General Public License version
16  * 2 along with this work; if not, write to the Free Software Foundation,
17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18  *
19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20  * or visit www.oracle.com if you need additional information or have any
21  * questions.
22  */
23 
24 /**
25  * @test
26  * @bug 8237072
27  * @summary Test compiler on various constructs it had issues with.
28  */
29 
30 import java.util.ArrayList;
31 import java.util.Arrays;
32 
33 public class NoCrashTest {
34 
35     interface I {}
36     static class C implements I {}
37     static primitive final class V implements I { int x = 0; }
38 
39     static void triggerNPE(V.ref [] vra) {
40         vra[0] = null;
41     }
42 
43     static String foo(V[] va) {
44         return "array of nonnull v's";
45     }
46 
47     static String foo(Object [] oa) {
48         return "array of nullable o's";
49     }
50 
51     static public void main(String[] args) {
52         I arg = args.length == 0 ? new V() : new C();
53         V [] xs = new V[0];
54         Object [] os = new Object [0];
55         Object [] o = args.length == 0 ? xs : os;
56         Object o2 = (o == null) ? new V()  : new Object();
57 
58         triggerNPE(new V.ref[1]); // NO NPE.
59         try {
60             triggerNPE(new V[1]);
61             throw new RuntimeException("Should not get here!");
62         } catch (NullPointerException npe) {
63             // all is well.
64         }
65 
66         V [] v = new V[0];
67         if (!foo((V.ref []) v).equals("array of nullable o's"))
68             throw new AssertionError("Broken");
69 
70         ArrayList<V.ref> vList = new ArrayList<V.ref>(Arrays.asList(new V.ref[10]));
71     }
72 }