LCB needs to handle error 0x24 PROTOCOL_BINARY_RESPONSE_EACCESS

Using libcouchbase 2.6.1 + Python SDK 2.1.0
Subdoc isn't implemented in Couchbase Server 4.1.0 but when issuing subdoc commands against a GA 4.1.0 cluster I get a client error that it wasn't able to parse the result from the server.
It should understand the error from the server correctly.

COUCHBASE: Unhandled memcached status=0x24
Traceback (most recent call last):
  File "./foo.py", line 9, in <module>
    rv = cb.lookup_in('caldera_brewing', SD.get('geo.accuracy'))
  File "/Library/Python/2.7/site-packages/couchbase/bucket.py", line 775, in lookup_in
    return super(Bucket, self).lookup_in(

, **kwargs)
couchbase.exceptions.LCB_0x3D (generated, catch: ): <Key='caldera_brewing', RC=0x3D[The server replied with an unrecognized status code. A newer version of this library may be able to decode it], Operational Error, Results=1, C Source=(src/multiresult.c,309)>

Mark said the memcached error 0x24 is PROTOCOL_BINARY_RESPONSE_EACCESS