client.rb in amq-protocol-2.0.1

- old
+ new

@@ -1435,10 +1435,11 @@
 
         # result = [60, 0, body_size, flags].pack('n2Qn')
         result = [60, 0].pack(PACK_UINT16_X2)
         result += AMQ::Pack.pack_uint64_big_endian(body_size)
         result += [flags].pack(PACK_UINT16)
-        result + pieces.join(EMPTY_STRING)
+        pieces_joined = pieces.join(EMPTY_STRING)
+        result.force_encoding(pieces_joined.encoding) + pieces_joined
       end
 
       # THIS DECODES ONLY FLAGS
       DECODE_PROPERTIES = {
         0x8000 => :content_type,