click Exit segmentation fault 点击exit出现段错误

[itas109]

Describe the bug
click Exit segmentation fault
点击exit出现段错误

To Reproduce
Steps to reproduce the behavior:
click Exit button

Screenshots

$ ./commlite 
段错误 (核心已转储)

Desktop (please complete the following information):

• OS: ubuntu 20.04
• Compiler: gcc 9.3.0
• Version: 1.0.0

[itas109]

maybe sigslot's problem

[itas109]

class mySlot : public has_slots<>
{
public:
	mySlot(CSerialPort * sp)
    {
	    recLen = -1;
        p_sp = sp; 
    };

	void OnSendMessage()
	{
		//read
		recLen = p_sp->readAllData(str);

        if(recLen > 0)
        {
            if(!isShowHex)
            {
                str[recLen] = '\0';
                bodymsg(str);
            }
            else
            {
                for (int i = 0; i < recLen; i++)
                {
                    snprintf(hexChar,sizeof(hexChar), "%02X ", str[i] & 0xFF);// two bit hex +  one bit space + '\0'
                    hexChar[sizeof(hexChar)-1] = '\0';
                    bodymsg(hexChar);
                }
            }
        }
	};

private:
	mySlot(){};

private:
	CSerialPort * p_sp;

    int recLen;
    char hexChar[4];// two bit hex +  one bit space + '\0'
	char str[1024];
};

CSerialPort m_serialPort;
mySlot receive(&m_serialPort);