Logging to ascii_pipe fails in 6.2.x

/lib64/libpthread.so.0(+0xf7e0)[0x2ba4ab4f97e0]
/lib64/libc.so.6(gsignal+0x35)[0x2ba4ac134625]
/lib64/libc.so.6(abort+0x175)[0x2ba4ac135e05]
..//lib64/libtsutil.so.6(signal_crash_handler(int, siginfo*, void*)+0x54)[0x2ba4aa053184]
../bin/traffic_server(crash_logger_invoke(int, siginfo*, void*)+0x8e)[0x4af11e]
/lib64/libpthread.so.0(+0xf7e0)[0x2ba4ab4f97e0]
../bin/traffic_server(LogFile::preproc_and_try_delete(LogBuffer*)+0x3f)[0x5cbeef]
../bin/traffic_server(LogBufferManager::preproc_buffers(LogBufferSink*)+0xb3)[0x5d5ba3]
../bin/traffic_server(LogObjectManager::preproc_buffers(int)+0x53)[0x5d7a33]
../bin/traffic_server(Log::preproc_thread_main(void*)+0x8f)[0x5b644f]
../bin/traffic_server(LoggingPreprocContinuation::mainEvent(int, void*)+0xd)[0x5bb4cd]
../bin/traffic_server(EThread::execute()+0x83)[0x6fc4c3]
../bin/traffic_server[0x6fb9ea]
/lib64/libpthread.so.0(+0x7aa1)[0x2ba4ab4f1aa1]
/lib64/libc.so.6(clone+0x6d)[0x2ba4ac1ea93d]
traffic_server - STACK TRACE:

 if (m_file_format != LOG_FILE_PIPE) {
    m_log = new BaseLogFile(name, m_signature);
    m_log->set_hostname(Machine::instance()->hostname);
  } else {
    m_log = NULL;
  }