--- /dev/null	2020-01-17 11:46:19.065201212 +0100
+++ new/test/hotspot/jtreg/gc/shenandoah/TestLargeObjectAlignment.java	2020-01-17 17:11:04.285127494 +0100
@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 2016, 2018, Red Hat, Inc. All rights reserved.
+ *
+ * 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 TestLargeObjectAlignment
+ * @summary Shenandoah crashes with -XX:ObjectAlignmentInBytes=16
+ * @key gc
+ * @requires vm.gc.Shenandoah & !vm.graal.enabled & (vm.bits == "64")
+ *
+ * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ObjectAlignmentInBytes=16 -Xint                   TestLargeObjectAlignment
+ * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ObjectAlignmentInBytes=16 -XX:-TieredCompilation  TestLargeObjectAlignment
+ * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ObjectAlignmentInBytes=16 -XX:TieredStopAtLevel=1 TestLargeObjectAlignment
+ * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ObjectAlignmentInBytes=16 -XX:TieredStopAtLevel=4 TestLargeObjectAlignment
+ */
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.ThreadLocalRandom;
+
+public class TestLargeObjectAlignment {
+
+    static final int SLABS_COUNT = Integer.getInteger("slabs", 10000);
+    static final int NODE_COUNT = Integer.getInteger("nodes", 10000);
+    static final long TIME_NS = 1000L * 1000L * Integer.getInteger("timeMs", 5000);
+
+    static Object[] objects;
+
+    public static void main(String[] args) throws Exception {
+        objects = new Object[SLABS_COUNT];
+
+        long start = System.nanoTime();
+        while (System.nanoTime() - start < TIME_NS) {
+            objects[ThreadLocalRandom.current().nextInt(SLABS_COUNT)] = createSome();
+        }
+    }
+
+    public static Object createSome() {
+        List<Integer> result = new ArrayList<Integer>();
+        for (int c = 0; c < NODE_COUNT; c++) {
+            result.add(new Integer(c));
+        }
+        return result;
+    }
+
+}