GCC Linux Simple Example Using DataFile Core Dumps

[richjohnson905-home]

Following the example for DataFile.cc (bottom of page) at: https://avro.apache.org/docs/current/api/cpp/html/index.html

The example runs fine on macos but on any gcc linux system (ubuntu 18.04, debian buster, etc) the program core dumps for uninitialized value. The target is linux.

I use conan to pull in the lib:

[requires]
  libavrocpp/1.10.2

[generators]
  cmake

I could really use some help on this. I don't see any other c++ solutions and the client is in need.

dbh-vm :: CLionProjects/AvroLastChance/cmake-build-debug » valgrind ./bin/AvroLastChance                                                               
139 ↵
==42562== Memcheck, a memory error detector
==42562== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==42562== Using Valgrind-3.18.1 and LibVEX; rerun with -h for copyright info
==42562== Command: ./bin/AvroLastChance
==42562== 
==42562== Use of uninitialised value of size 8
==42562==    at 0x11B0B2: avro::codec_traits<double>::encode(avro::Encoder&, double) (Specific.hh:151)
==42562==    by 0x11B214: void avro::encode<double>(avro::Encoder&, double const&) (Specific.hh:332)
==42562==    by 0x11B11C: avro::codec_traits<c::cpx>::encode(avro::Encoder&, c::cpx const&) (cpx.hh:44)
==42562==    by 0x11B51C: void avro::encode<c::cpx>(avro::Encoder&, c::cpx const&) (Specific.hh:332)
==42562==    by 0x11B37B: avro::DataFileWriter<c::cpx>::write(c::cpx const&) (DataFile.hh:166)
==42562==    by 0x11AF7E: test2() (main.cpp:52)
==42562==    by 0x11AEE0: main (main.cpp:39)

Schema (generated the cpx.hh with avrogencpp tool): avrogencpp -i cpx.json -o cpx.hh -n c

{
  "type": "record",
  "name": "cpx",
  "fields" : [
    {
      "name": "re",
      "type": "double"
    },
    {
      "name": "im",
      "type" : "double"
    }
  ]
}

Code:

 #include <iostream>
#include "cpx.hh"
#include "avro/Encoder.hh"
#include "avro/Decoder.hh"
#include "avro/ValidSchema.hh"
#include "avro/Compiler.hh"
#include "avro/DataFile.hh"
#include <fstream>

avro::ValidSchema loadSchema(const char* filename)
{
   std::ifstream ifs(filename);
   avro::ValidSchema result;
   avro::compileJsonSchema(ifs, result);
   return result;
}

int main()
{
   avro::ValidSchema cpxSchema = loadSchema("cpx.json");
   {
      avro::DataFileWriter<c::cpx> dfw("test.avro", cpxSchema);
      c::cpx c1;
      for (int i = 0; i < 100; i++) {
         c1.re = i * 100;
         c1.im = i + 100;
         dfw.write(c1);
      }
      dfw.close();
   }
   return 0;
}