Need to copy bytes out of ByteBuffer, not reference internal array.

Author: donaldh

src/vm/jvm/runtime/org/perl6/nqp/io/AsyncSocketHandle.java

@@ -164,7 +164,9 @@ public void readBytes(final ThreadContext tc, final AsyncTaskInstance task, fina
             public SixModelObject decode(ThreadContext tc, ByteBuffer source, Integer numRead)
                     throws Exception {
                 SixModelObject res = bufType.st.REPR.allocate(tc, bufType.st);
-                Buffers.stashBytes(tc, res, source.slice().array());
+                byte[] bytes = new byte[source.remaining()];
+                source.get(bytes);
+                Buffers.stashBytes(tc, res, bytes);
                 return res;
             }
         });