QT tcpserver启动监听SIGSEGV错误

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Signal Received
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<p>The inferior stopped because it received a signal from the operating system.<p><table><tr><td>Signal name : </td><td>SIGSEGV</td></tr><tr><td>Signal meaning : </td><td>Segmentation fault</td></tr></table>
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OK
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tcpServer=new QTcpServer(); //缺少此句，没有实例化就会报错，C#是实例化，QT表示创建对象