Двойной вызов деструктора

    CharRow row(4);
    CharRow row2(3);
 
    cin >> row;
    cin >> row2;
 
    CharRow temp = row - row2;

    CharRow CharRow::operator- (CharRow& row2)
    {
        int row1Length = this->getRowCurrentLength();
        int row2Length = row2.getRowCurrentLength();
 
        CharRow tempRow(row1Length - row2Length);
 
        char source[row1Length];
 
        for(int i = 0; i < row1Length; i++){
            source[i] = this->ptr[i];
        }
 
        char* tmpStr;
 
        tmpStr = strstr(source, row2.ptr);
 
        //if row2 is not substring for row1
        if(tmpStr == NULL){
            return *this;
        }
 
        strcpy(tmpStr, tmpStr + row2Length);
 
            for(int i = 0; i < row1Length - row2Length;i++){
             tempRow.ptr[i] = source[i];
         }
 
        return tempRow;
    }

CharRow temp = row - row2;

       return tempRow;

class CharRow{
 
protected:
    char* ptr;
    int ROW_MAX_LENGTH;
 
public:
    //Constructors
    CharRow(int);
    CharRow();
    //Copy Constructor
    CharRow(const CharRow &);
 
    //methods
    void fillRow(char);
    void printRow();
    virtual void enterRowFromKeyboard();
    int getRowMaxLength();
    int getRowCurrentLength();
    void setSymbol(int index, char symbol);
    void printSeparator();
 
    //overloaded operators
    virtual CharRow operator+ (CharRow& row2); //concatenate two rows
    CharRow operator- (CharRow& row2); //delete one row from another
    bool operator* (CharRow& row2); //check entry one row in another
    virtual CharRow operator= (CharRow& row2);
 
    //friends operators for stream
     friend void operator<< (std::ostream &os, CharRow &row);
     friend void operator>> (std::istream &os,CharRow &row);
 
    //Destructor
    virtual ~CharRow();
};