6971877: Project Coin: improve semantics of suppressed exceptions in try-with-resources

Reviewed-by: jjb

test/tools/javac/TryWithResources/TwrSuppression.java

+/*
+ * Copyright (c) 2010, 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 6971877
+ * @author Joseph D. Darcy
+ * @summary Verify a primary exception suppresses all throwables
+ */
+
+public class TwrSuppression implements AutoCloseable {
+    public static void main(String... args) throws Throwable {
+        try {
+            try (TwrSuppression r1 = new TwrSuppression(false);
+                 TwrSuppression r2 = new TwrSuppression(true)) {
+                throw new RuntimeException();
+            }
+        } catch(RuntimeException e) {
+            Throwable[] suppressedExceptions = e.getSuppressedExceptions();
+            int length = suppressedExceptions.length;
+            if (length != 2)
+                throw new RuntimeException("Unexpected length " + length);
+
+            if (suppressedExceptions[0].getClass() != Error.class ||
+                suppressedExceptions[1].getClass() != Exception.class) {
+                System.err.println("Unexpected suppressed types!");
+                e.printStackTrace();
+                throw new RuntimeException(e);
+            }
+        }
+    }
+
+    private boolean throwError;
+
+    private TwrSuppression(boolean throwError) {
+        this.throwError = throwError;
+    }
+
+    @Override
+    public void close() throws Exception {
+        if (throwError) {
+            throw new Error();
+        } else {
+            throw new Exception();
+        }
+    }
+}