8155106: MHs.Lookup.findConstructor returns handles for array classes

Reviewed-by: sundar

src/share/classes/java/lang/invoke/MethodHandles.java

 /*
- * Copyright (c) 2008, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2008, 2016, 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
@@ -916,6 +916,9 @@ assertEquals("[x, y, z]", pb.command().toString());
          * @throws NullPointerException if any argument is null
          */
         public MethodHandle findConstructor(Class<?> refc, MethodType type) throws NoSuchMethodException, IllegalAccessException {
+            if (refc.isArray()) {
+                throw new NoSuchMethodException("no constructor for array class: " + refc.getName());
+            }
             String name = "<init>";
             MemberName ctor = resolveOrFail(REF_newInvokeSpecial, refc, name, type);
             return getDirectConstructor(refc, ctor);

test/java/lang/invoke/ArrayConstructorTest.java

+/*
+ * Copyright (c) 2016, 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.  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
+ * 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 8155106
+ * @run testng/othervm -ea -esa test.java.lang.invoke.ArrayConstructorTest
+ */
+package test.java.lang.invoke;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+
+import static java.lang.invoke.MethodType.methodType;
+
+import static org.testng.AssertJUnit.*;
+
+import org.testng.annotations.*;
+
+
+public class ArrayConstructorTest {
+
+    static final MethodHandles.Lookup LOOKUP = MethodHandles.lookup();
+
+    @Test
+    public static void testFindConstructorArray() {
+        boolean caught = false;
+        try {
+            MethodHandle h = LOOKUP.findConstructor(Object[].class, methodType(void.class));
+        } catch (NoSuchMethodException nsme) {
+            assertEquals("no constructor for array class: [Ljava.lang.Object;", nsme.getMessage());
+            caught = true;
+        } catch (Exception e) {
+            throw new AssertionError("unexpected exception: " + e);
+        }
+        assertTrue(caught);
+    }
+
+}
+