问使用_tcstok时的访问冲突

EN

vector<TCHAR> TabDelimitedSource::getNext() {
// Returns the next document (a given cell) from the file(s)
TCHAR row[256]; // Return NULL if no more documents/rows
vector<TCHAR> document;

try{
    //Read each line in the file, corresponding to and individual document
    buff_reader->getline(row,10000);
    }
catch (ifstream::failure e){
        ; // Ignore and fall through
    }

if (_tcslen(row)>0){
    this->current_row += 1;
    vector<TCHAR> cells;
      //Separate the line on tabs (id 'tab' document title 'tab' document body)
     TCHAR *  pch;
     pch = _tcstok(row,"\t");
     while (pch != NULL){
         cells.push_back(*pch);
         pch = _tcstok(NULL, "\t");
     }

    // Split the cell into individual words using the lucene analyzer
    try{
      //Separate the body by spaces
        TCHAR original_document ;
        original_document = (cells[column_holding_doc]);
        try{
            TCHAR * pc;
            pc = _tcstok((char*)original_document," ");
             while (pch != NULL){
                 document.push_back(*pc);
                pc = _tcstok(NULL, "\t");
             }