Okay, it seems that before calling "SerializeWithCachedSizes", I need to
call "ByteSize()", according to
"https://github.com/protocolbuffers/protobuf/issues/5026";, which fixes this
problem.
On Thursday, February 20, 2020 at 1:22:03 AM UTC-6, Zi Wang wrote:
>
> Hi,
>
> I have been using protobuf for a while and it worked properly. Recently I
> have written a new project but has this serialization issue. Here is the
> example:
>
> In the .proto file, I have this definition:
> ------------
> syntax = "proto2";
>
> package diff_input;
>
> message Diff{
> message File{
> required bool val = 1;
> }
> required File file = 1;
> }
> ------------
>
> After compiling it to .cc and .h files, I have this simple test:
> -------------------------
> using namespace std;
> using namespace google::protobuf::io;
> using namespace diff_input;
>
> int main(){
> Diff* file = new Diff();
> Diff_File* input = new Diff_File();
> *input->set_val(true);*
> file->set_allocated_file(input);
> int outfd = open("serial_file", O_RDWR | O_CREAT|O_TRUNC , 0666);
> if(outfd == -1){
> std::cout<<"Open Error\n";
> }
> ZeroCopyOutputStream* output = new FileOutputStream(outfd);
> CodedOutputStream *p_stream = new CodedOutputStream(output);
> file->SerializeWithCachedSizes(p_stream);
> delete(p_stream);
> delete(output);
> close(outfd);
> return 1;
> }
> -------------------------
>
> When I run the executable, I received an error
> ----------------------
> [libprotobuf FATAL
> ~/build/external.protobuf/src/external.protobuf/src/google/protobuf/wire_format_lite.cc:580]
>
> CHECK failed: (end - target) == (size):
> Aborted
> ----------------------
>
> However, if I commented " *input->set_val(true);*", I would not receive
> any errors.
>
> My protoc executable is of version "libprotoc 3.5.1".
>
> Many thanks!
>
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