*** Error in `/opt/app': double free or corruption (fasttop): 0x000000000570b960 ***

[FabioNevesRezende]

*** Error in `/opt/app': double free or corruption (fasttop): 0x000000000570b960 ***
======= Backtrace: =========
/lib64/libc.so.6(+0x81329)[0x7fbd4a0b9329]
/opt/app(_ZN8RabbitMQ14consumerRabbitER11ApplicationRKSs+0x3d5)[0x8b332b]
/opt/app(main+0xe06)[0x837dc1]
/lib64/libc.so.6(__libc_start_main+0xf5)[0x7fbd4a05a555]
/opt/app[0x836e61]
======= Memory map: ========
00400000-00d22000 r-xp 00000000 103:02 8537181 /opt/app
00f21000-00f2b000 r--p 00921000 103:02 8537181 /opt/app
00f2b000-00f2e000 rw-p 0092b000 103:02 8537181 /opt/app
00f2e000-00f33000 rw-p 00000000 00:00 0
02b51000-05851000 rw-p 00000000 00:00 0

The consumer rabbit function is:

bool RabbitMQ::consumerRabbit(Application & application)
{
  try {
    amqp_rpc_reply_t res;
    amqp_envelope_t envelope;

    envelope.delivery_tag = true;

    amqp_maybe_release_buffers(_mConn);

    res = amqp_consume_message(_mConn, &envelope, NULL, 0);
    readmessages++;

    std::string str;
    str.clear();
    if (AMQP_RESPONSE_LIBRARY_EXCEPTION == res.reply_type &&
      AMQP_STATUS_UNEXPECTED_STATE == res.library_error)
    {
      std::string error_msg("RabbitMQ::consumerRabbit Error: Erro ao retirar elemento da fila");
      std::string libError(amqp_error_string2(res.library_error));

      if (res.library_error)
        error_msg += ": " + libError;
	  std::cout << error_msg << std::endl;

      return false;
    }


    if (envelope.message.body.len > 0)
    {
      getEnvelopeStrAndLog(envelope, str);

      amqp_basic_ack(_mConn, 1, envelope.delivery_tag, true);

      while ((!application.isConnected())) {
        boost::this_thread::sleep(boost::posix_time::milliseconds(500));
        amqp_basic_nack(_mConn, 1, envelope.delivery_tag, true, true);
      }

      amqp_destroy_envelope(&envelope);
      // do stuff with message str 
    }
    return true;
  }
  catch (std::exception& e) {
    return false;
  }
}

The connection part is similar to the example here
any guess what could be wrong when reading from the socket?