merkledag.proto and error

merkledag.proto

package merkledag.pb;

import "code.google.com/p/gogoprotobuf/gogoproto/gogo.proto";

option (gogoproto.gostring_all) = true;
option (gogoproto.equal_all) = true;
option (gogoproto.verbose_equal_all) = true;
option (gogoproto.goproto_stringer_all) = false;
option (gogoproto.stringer_all) =  true;
option (gogoproto.populate_all) = true;
option (gogoproto.testgen_all) = true;
option (gogoproto.benchgen_all) = true;
option (gogoproto.marshaler_all) = true;
option (gogoproto.sizer_all) = true;
option (gogoproto.unmarshaler_all) = true;


// An IPFS MerkleDAG Link
message PBLink {

  // multihash of the target object
  optional bytes Hash = 1;

  // utf string name. should be unique per object
  optional string Name = 2;

  // cumulative size of target object
  optional uint64 Tsize = 3;
}

// An IPFS MerkleDAG Node
message PBNode {

  // refs to other objects
  repeated PBLink Links = 2;

  // opaque user data
  optional bytes Data = 1;
}

Errors: "Unable to map onto output with error on input "package merkledag.pb;"
  Both operation failed: Unable to match first of two parsers on input "package merkledag.pb;"
    Both operation failed: Unable to match first of two parsers on input "package merkledag.pb;"
      Unable to map onto output with error on input "package merkledag.pb;"
        Both operation failed: Unable to match first of two parsers on input "package merkledag.pb;"
          Both operation failed: Unable to match first of two parsers on input "package merkledag.pb;"
            Both operation failed: Unable to match first of two parsers on input "package merkledag.pb;"
              Unable to map onto output with error on input "package merkledag.pb;"
                Either operation failed: neither operation matched
                  Unable to map onto output with error on input "package merkledag.pb;"
                    Both operation failed: Unable to match first of two parsers on input "package merkledag.pb;"
                      Either operation failed: neither operation matched
                        Unable to map onto output with error on input "package merkledag.pb;"
                          Both operation failed: Unable to match first of two parsers on input "package merkledag.pb;"
                            Unable to map onto output with error on input "package merkledag.pb;"
                              Repeat operation failed: Not enough elements matched. Expected at least 1 but got only 0 on input "package merkledag.pb;"
                                Either operation failed: neither operation matched
                                  Unable to map onto output with error on input "package merkledag.pb;"
                                    Both operation failed: Unable to match first of two parsers on input "package merkledag.pb;"
                                      Unable to map onto output with error on input "package merkledag.pb;"
                                        Repeat operation failed: Not enough elements matched. Expected at least 1 but got only 0 on input "package merkledag.pb;"
                                          Either operation failed: neither operation matched
                                            Unable to map onto output with error on input "package merkledag.pb;"
                                              Both operation failed: Unable to match first of two parsers on input "package merkledag.pb;"
                                                /root/.nimble/pkgs/protobuf-0.1.2/protobuf/private/parse.nim(51, 23): Character set parser couldn't match any characters with the charset {32,9, 11, 13, 10, 12} on input "package merkledag.pb;""
stack trace: (most recent call last)
/root/.nimble/pkgs/protobuf-0.1.2/protobuf.nim(797) parseProtoFile
/root/.nimble/pkgs/protobuf-0.1.2/protobuf/private/parse.nim(222) parseToDefinition
/root/.nimble/pkgs/protobuf-0.1.2/protobuf/private/parse.nim(204) expandToFullDef
main.nim(16, 15) template/generic instantiation from here
/root/.nimble/pkgs/protobuf-0.1.2/protobuf/private/parse.nim(204, 32) Error: attempt to access a nil address