Webmachine error on GET for siblings

[dmitrizagidulin]

Issuing a get to an object with two (binary blob) siblings results in error:

catch rhc:get(rhc:create("127.0.0.1", 8098, "riak", []), <<"user_data_cache">>,list_to_binary(integer_to_list(447431762613))).
{'EXIT',{{badmatch,[<<"\r\n">>]},
         [{webmachine_multipart,make_part,1,
                                [{file,"src/webmachine_multipart.erl"},
                                 {line,102}]},
          {webmachine_multipart,stream_form,3,
                                [{file,"src/webmachine_multipart.erl"},
                                 {line,77}]},
          {webmachine_multipart,get_all_parts,2,
                                [{file,"src/webmachine_multipart.erl"},
                                 {line,58}]},
          {rhc_obj,decode_siblings,2,
                   [{file,"src/rhc_obj.erl"},{line,79}]},
          {rhc_obj,make_riakc_obj,4,
                   [{file,"src/rhc_obj.erl"},{line,43}]},
          {rhc,get,4,[{file,"src/rhc.erl"},{line,178}]},
          {erl_eval,do_apply,6,[{file,"erl_eval.erl"},{line,576}]},
          {erl_eval,expr,5,[{file,"erl_eval.erl"},{line,360}]}]}}

To reproduce:

RO2 = riakc_obj:new(<<"BUCKET">>, <<"KEY2">>, <<"SomeData">>).
RO3 = riakc_obj:new(<<"BUCKET">>, <<"KEY2">>, <<"SomeMoreData">>).

rhc:put(rhc:create("127.0.0.1", 8098, "riak", []), RO2).
rhc:put(rhc:create("127.0.0.1", 8098, "riak", []), RO3).
rhc:get(rhc:create("127.0.0.1", 8098, "riak", []), <<"BUCKET">>, <<"KEY2">>).

For reference, here's what the object for the error above looks like, via curl:

curl localhost:8098/riak/user_data_cache/447431762613 -H "accept:multipart/mixed" -v
* About to connect() to localhost port 8098 (#0)
*   Trying ::1...
* Connection refused
*   Trying 127.0.0.1...
* connected
* Connected to localhost (127.0.0.1) port 8098 (#0)
> GET /riak/user_data_cache/447431762613 HTTP/1.1
> User-Agent: curl/7.26.0
> Host: localhost:8098
> accept:multipart/mixed
>
* HTTP 1.1 or later with persistent connection, pipelining supported
< HTTP/1.1 300 Multiple Choices
< X-Riak-Vclock: a85hYGBgzGDKBVIc7N//6Yf2yq3OYEpkymNlKFvIeJ4vCwA=
< Vary: Accept, Accept-Encoding
< Server: MochiWeb/1.1 WebMachine/1.10.0 (never breaks eye contact)
< Last-Modified: Fri, 26 Jun 2015 10:12:06 GMT
< ETag: "1YIAAqwL3zHEo8ze8qb1tc"
< Date: Fri, 26 Jun 2015 10:59:34 GMT
< Content-Type: multipart/mixed; boundary=Qh1ip4nObAMmn9KcnHGVjhKgNBG
< Content-Length: 759
<

--Qh1ip4nObAMmn9KcnHGVjhKgNBG
Content-Type: application/octet-stream
Link: </riak/user_data_cache>; rel="up"
Etag: 7IrjozbcMxYAjy6v7FWvv5
Last-Modified: Fri, 26 Jun 2015 10:12:05 GMT�h
  d
share_datab1h�n��-hhn���jjjn���jd       undefinedd      undefinedd      undefined
--Qh1ip4nObAMmn9KcnHGVjhKgNBG
Content-Type: application/octet-stream
Link: </riak/user_data_cache>; rel="up"
Etag: Z7IKoboZTrL5CYzTo2XqC
Last-Modified: Fri, 26 Jun 2015 10:12:06 GMT
�h
  d
share_datab1h�n��-hhn���jlhh
                            d
AFUP_100MB_HSd  undefinedk
                          63602536325dvirtualk2hhb�aa
                                                     haaahhb�aa
                                                               haaa$d   undefinedn��-hn��-hHS_100MBn���jjn���jd undefinedd      undefinedd      undefined
--Qh1ip4nObAMmn9KcnHGVjhKgNBG--
* Connection #0 to host localhost left intact
* Closing connection #0