QProcess::start调用console application时，出现waitForFinished超时

程序中需要调用外部SqlFormatter.exe来格式化SQL脚本，该程序从命令行读取配置参数。

调用waitForStarted执行ok

调用waitForBytesWritten，返回值为false，QProcess::ProcessError为5，即QProcess::UnknownError。

调用waitForFinished，函数超时，且SqlFormatter.exe进程掉死。

网上搜索无解，最终尝试在start之后立即调用closeWriteChannel，问题解决（即SqlFormatter.exe进程结束，基本功能正常）。但最终打印输出的是：

waitForFinished OK, Process error5

QString app = tr("./SqlFormatter.exe");
   QStringListargs;
   args<< sqlFilePathList.at(index) << tr("-b-") <<tr("-is=   ");
   //QProcess::startDetached(app, args);
   QProcess*process = new QProcess;
   process->start(app, args);
   process->closeWriteChannel();
   process->waitForStarted();

   if(!process->waitForFinished())
    {
       if(enableDebug)
       {
           sqlError->append(tr("waitForFinished NOK, Process error%1").arg(process->error()));
       }
    }
    else
    {
       if(enableDebug)
       {
           sqlError->append(tr("waitForFinished OK, Process error%1").arg(process->error()));
       }
    }

    delete process;