--- a/src/hotspot/share/classfile/bytecodeAssembler.cpp	Mon Mar 12 14:11:54 2018 -0700
+++ b/src/hotspot/share/classfile/bytecodeAssembler.cpp	Thu Mar 08 14:33:57 2018 -0800
@@ -56,6 +56,11 @@
   cp->set_pool_holder(_orig->pool_holder());
   _orig->copy_cp_to(1, _orig->length() - 1, cp, 1, CHECK_NULL);
 
+  // Preserve dynamic constant information from the original pool
+  if (_orig->has_dynamic_constant()) {
+    cp->set_has_dynamic_constant();
+  }
+
   for (int i = 0; i < _entries.length(); ++i) {
     BytecodeCPEntry entry = _entries.at(i);
     int idx = i + _orig->length();

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/java/lang/invoke/condy/CondyInterfaceWithOverpassMethods.java	Thu Mar 08 14:33:57 2018 -0800
@@ -0,0 +1,107 @@
+/*
+ * Copyright (c) 2018, 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 8186046
+ * @summary Test for an interface using condy with default overpass methods
+ * @library /lib/testlibrary/bytecode
+ * @build jdk.experimental.bytecode.BasicClassBuilder
+ * @run testng CondyInterfaceWithOverpassMethods
+ * @run testng/othervm -XX:+UnlockDiagnosticVMOptions -XX:UseBootstrapCallInfo=3 CondyInterfaceWithOverpassMethods
+ */
+
+import jdk.experimental.bytecode.BasicClassBuilder;
+import jdk.experimental.bytecode.Flag;
+import jdk.experimental.bytecode.TypedCodeBuilder;
+import org.testng.Assert;
+import org.testng.annotations.BeforeClass;
+import org.testng.annotations.Test;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodType;
+import java.lang.reflect.Method;
+import java.util.concurrent.atomic.AtomicInteger;
+
+@Test
+public class CondyInterfaceWithOverpassMethods {
+    interface A {
+        int a();
+
+        default int x() {
+            return 1;
+        }
+    }
+
+
+    // Generated class with methods containing condy ldc
+    Class<?> gc;
+
+    public static Object bsm(MethodHandles.Lookup l, String name, Class<?> type) {
+        return name;
+    }
+
+    @BeforeClass
+    public void generateClass() throws Exception {
+//        interface B extends A {
+//            // Overpass for method A.a
+//
+//            default void y() {
+//                // ldc to Dynamic
+//            }
+//        }
+        Class<?> thisClass = CondyInterfaceWithOverpassMethods.class;
+
+        String genClassName = thisClass.getSimpleName() + "$Code";
+        String bsmClassName = thisClass.getCanonicalName().replace('.', '/');
+        String bsmMethodName = "bsm";
+        String bsmDescriptor = MethodType.methodType(Object.class, MethodHandles.Lookup.class,
+                                                     String.class, Class.class).toMethodDescriptorString();
+
+        byte[] byteArray = new BasicClassBuilder(genClassName, 55, 0)
+                .withFlags(Flag.ACC_INTERFACE, Flag.ACC_ABSTRACT)
+                .withSuperclass("java/lang/Object")
+                .withSuperinterface(thisClass.getCanonicalName().replace('.', '/') + "$" + A.class.getSimpleName())
+                .withMethod("y", "()Ljava/lang/String;", M ->
+                        M.withFlags(Flag.ACC_PUBLIC)
+                                .withCode(TypedCodeBuilder::new, C ->
+                                        C.ldc("String", "Ljava/lang/String;", bsmClassName, bsmMethodName, bsmDescriptor,
+                                              S -> {})
+                                                .areturn()
+                                ))
+                .build();
+
+        // For debugging purposes
+        new FileOutputStream(new File(genClassName + ".class")).write(byteArray);
+
+        gc = MethodHandles.lookup().defineClass(byteArray);
+    }
+
+    @Test
+    public void testClass() throws Exception {
+        // Trigger initialization
+        Class.forName(gc.getName());
+    }
+}