hi all,
I've trying to load some data from file into a nested list. However, the application crashed during loading the data. I've put in some debug line in the code, and found the code crashed in appending data in my inner most list(line #76). Can someone please help me to understand what happened and how to fix it? Thanks.

main.cpp
Qt Code: 
  1. #include "snp_plotter.h"
  2. #include "ui_snp_plotter.h"
  3. #include "QFile"
  4. #include "QFileDialog"
  5. #include "QTextStream"
  6. #include "QMessageBox"
  7. #include "QDebug"
  8. #include "QRegularExpression"
  9. #include "QRegularExpressionMatch"
  10. #include <QQueue>
  11. #include <QVector>
  12. #include <QList>
  13.  
  14. SNP_Plotter::SNP_Plotter(QWidget *parent) :
  15.     QMainWindow(parent),
  16.     ui(new Ui::SNP_Plotter)
  17. {
  18.     ui->setupUi(this);
  19.     this->setCentralWidget(ui->verticalLayoutWidget);
  20. }
  21.  
  22. SNP_Plotter::~SNP_Plotter()
  23. {
  24.     delete ui;
  25. }
  26.  
  27. void SNP_Plotter::on_openSnpFile_clicked()
  28. {
  29.     // clean up the currntfile cache
  30.     QString openFile = QFileDialog::getOpenFileName(this,
  31.                                        tr("Open SNP file"),
  32.                                        "/usr",
  33.                                        "SNP(*.s*p)"
  34.                                        );
  35.  
  36.     //extract number of ports
  37.     QRegularExpression snpFormat(".s(\\d+)p");
  38.     QRegularExpressionMatch match0 = snpFormat.match(openFile);
  39.     nPorts = match0.captured(1);
  40.     qint8 numberItems = 2*(nPorts.toInt()*nPorts.toInt())+1;
  41.     listVector = new QList<QList<double>*>;
  42.  
  43.     for(auto i=0; i<numberItems; i++){
  44.         QList<double> *list = new QList<double>;
  45.         (*listVector)[i] = list;
  46.     }
  47.  
  48.     //open file
  49.     QFile file(openFile);
  50.     if (!file.open(QIODevice::ReadOnly | QFile::Text)) {
  51.         QMessageBox::warning(this, "Warning", "Cannot open file: " + file.errorString());
  52.         return;
  53.     }
  54.  
  55.  
  56.      QTextStream dataReading(&file);
  57.  
  58.      qint8 counter = 0;
  59.      QRegularExpression headerFormat("#\\s+(\\w+)\\s+(\\w+)\\s+(\\w+)\\s+(\\w+)\\s+(\\w+)");
  60.      QRegularExpression dataFormat("([^ ][-+]?[0-9]*\.?[0-9]+([eE][-+]?[0-9]+)?)");
  61.      QString currentLine;
  62.      while(!dataReading.atEnd()){
  63.         //start a new line in the file
  64.         currentLine = dataReading.readLine();
  65.  
  66.         //type of lines to skip
  67.         if((currentLine[0]=="\x0")||(currentLine[0]=="!") ){continue;}
  68.  
  69.         //data extraction and insertion
  70.         else if((currentLine[0]!="#")&&(currentLine[0]!="!")){
  71.             QRegularExpressionMatchIterator dataList = dataFormat.globalMatch(currentLine);
  72.             while(dataList.hasNext()){
  73.                 QRegularExpressionMatch matchedData = dataList.next();
  74.                 QString data = matchedData.captured(1);
  75.                 QList<double> *currentList= (*listVector)[counter%numberItems];
  76.                 currentList->append(data.toDouble());
  77.                 counter += 1;
  78.             }
  79.         }
  80.  
  81.         //header type extraction
  82.         else if ((currentLine[0]=="#")) {
  83.             QRegularExpressionMatch match2 = headerFormat.match(currentLine);
  84.             domainType = match2.captured(1);
  85.             measureType = match2.captured(2);
  86.             measureMethod = match2.captured(3);
  87.             referenceImp = match2.captured(5);
  88.         }
  89.      }
  90.      qInfo()<<(*listVector)[0]->size();
  91.     // extraction completed, close file
  92.      file.close();
  93. }
To copy to clipboard, switch view to plain text mode 


data:
Qt Code: 
  1. ! S3P File: Measurements: Mag<S11> Ang<S11> Mag<S12> Ang<S12> Mag<S13> Ang<S13>! row 1 
  2. !			  Mag<S21> Ang<S21> Mag<S22> Ang<S22> Mag<S23> Ang<S23>! row 2 
  3. !			  Mag<S31> Ang<S31> Mag<S32> Ang<S32> Mag<S33> Ang<S33>! row 3 
  4.  
  5.  
  6.  
  7. # Hz S  dB   R 50
  8. 10000000 -52.282864 83.754532 -15.67896 -0.49186572 -1.5670134 -1.301762
  9. -15.748223 -0.10280456 -50.764286 149.86646 -56.900387 -70.843872
  10. -1.5776229 -1.2955924 -71.374367 -141.70441 -48.866203 65.932648
  11. 29987500 -60.731289 51.972256 -15.724875 -1.8122723 -1.5746148 -3.2653806
  12. -15.716247 -1.8535374 -52.617325 178.46486 -62.476551 5.2978568
  13. -1.5735339 -3.2886419 -65.686714 36.462376 -61.792774 9.9133005
  14. 49975000 -64.386765 2.9596229 -15.755823 -3.1201222 -1.5706615 -5.4831181
  15. -15.738674 -3.0600834 -52.237274 169.75545 -58.964714 27.526367
  16. -1.5741955 -5.4729681 -58.479481 47.793446 -56.108696 63.561378
  17. 69962500 -60.896507 -36.51757 -15.757278 -4.3601637 -1.577867 -7.6754441
  18. -15.747104 -4.3896055 -50.548729 177.66254 -57.043007 9.1148758
  19. -1.5749472 -7.6169047 -56.500164 6.8388286 -57.866039 -28.409134
  20. 89950000 -55.328976 -45.191593 -15.76739 -5.6117945 -1.5797645 -9.8418713
  21. -15.749889 -5.5769963 -50.809414 173.62177 -57.651119 -0.7305429
  22. -1.5803487 -9.7842817 -56.621773 5.4209571 -66.583694 23.118269
  23. 109937500 -60.013988 -42.251778 -15.770485 -6.7288284 -1.5785085 -12.021818
  24. -15.764176 -6.7430348 -51.211327 170.20062 -56.137653 -1.5785257
  25. -1.5805914 -11.985991 -55.860668 0.92532599 -58.335781 15.83968
  26. 129925000 -55.2337 -47.264515 -15.773083 -7.9232988 -1.5834771 -14.20496
  27. -15.74941 -7.9423704 -52.448433 166.58505 -57.46785 -5.3259425
  28. -1.5812542 -14.161623 -57.962692 0.68304181 -66.230148 -5.397459
  29. 149912500 -52.218529 -63.591721 -15.763268 -9.1296005 -1.5826913 -16.37332
  30. -15.770909 -9.0827551 -51.982231 165.33054 -56.151371 -14.161432
  31. -1.586452 -16.33128 -56.938805 -20.056446 -57.895336 -49.978813
  32. 169900000 -48.723946 -68.877541 -15.772202 -10.29782 -1.58857 -18.537006
  33. -15.756567 -10.253307 -53.100327 166.75829 -57.286308 -21.661839
  34. -1.5859301 -18.455862 -58.19286 -23.011927 -56.403473 -61.177219
  35. 189887500 -47.055653 -63.976929 -15.761551 -11.486256 -1.5892707 -20.66897
  36. -15.756705 -11.417432 -52.570255 161.31961 -58.11451 -14.260036
  37. -1.589681 -20.645853 -58.313042 -19.368044 -56.06601 -59.461319
  38. 209875000 -48.199955 -65.147034 -15.758836 -12.678895 -1.5931528 -22.858885
  39. -15.750708 -12.633892 -54.576355 159.43607 -57.476353 -23.090178
  40. -1.5905892 -22.808754 -57.229259 -22.673452 -53.756973 -77.388786
  41. 229862500 -47.620575 -65.079559 -15.761273 -13.856562 -1.5960027 -24.995838
  42. -15.757499 -13.857363 -54.944546 168.24443 -57.51046 -25.383596
  43. -1.5932056 -24.973335 -56.755974 -24.434172 -53.588017 -78.209816
  44. 249850000 -45.54829 -72.373695 -15.759305 -15.106434 -1.5959594 -27.192209
  45. -15.754061 -15.04305 -56.757584 167.29137 -57.757648 -35.331924
  46. -1.593374 -27.133352 -57.15892 -38.918037 -52.251003 -78.6092
  47. 269837500 -45.209282 -79.048836 -15.762296 -16.186449 -1.595193 -29.34836
  48. -15.761364 -16.268795 -56.31012 155.37877 -58.96965 -36.80077
  49. -1.6012613 -29.305353 -58.892376 -30.59782 -51.139919 -88.653198
  50. 289825000 -44.495762 -75.946327 -15.77701 -17.442837 -1.5954289 -31.487225
  51. -15.759547 -17.546104 -57.791164 136.05252 -58.239506 -44.324471
  52. -1.6040369 -31.49972 -58.461231 -38.748329 -50.686073 -102.10234
  53. 309812500 -43.302803 -82.000542 -15.766918 -18.634033 -1.5996813 -33.661705
  54. -15.761863 -18.641865 -61.730743 144.8166 -60.559978 -37.826778
  55. -1.6024027 -33.65374 -57.697384 -42.566422 -51.518753 -105.38393
  56. 329800000 -43.696449 -78.707024 -15.772308 -19.829834 -1.6114002 -35.827797
  57. -15.758872 -19.892492 -61.704247 131.07913 -60.35778 -39.423588
  58. -1.6023126 -35.767818 -59.314335 -32.67252 -52.212837 -96.09478
  59. 349787500 -41.770233 -79.74221 -15.764846 -21.037899 -1.6063002 -37.965122
  60. -15.761175 -21.141983 -67.287781 106.3756 -59.302685 -45.419971
  61. -1.6093071 -37.931061 -58.065773 -47.054985 -50.113159 -100.45293
  62. 369775000 -41.834766 -85.074005 -15.755595 -22.26008 -1.6062098 -40.106232
  63. -15.755444 -22.253096 -67.486336 95.830017 -60.84161 -46.56329
  64. -1.6086895 -40.089161 -59.786545 -45.948189 -49.895309 -123.41199
  65. 389762500 -40.628685 -85.450836 -15.762123 -23.489182 -1.6093255 -42.268429
  66. -15.763054 -23.396936 -68.248146 81.470787 -60.379967 -55.129562
  67. -1.608591 -42.201767 -61.377071 -50.809517 -50.866241 -127.41563
  68. 409750000 -40.523582 -86.431625 -15.7611 -24.674004 -1.6127316 -44.40868
  69. -15.759981 -24.647635 -75.545479 166.72386 -58.76609 -50.209095
  70. -1.6096529 -44.381767 -58.312939 -53.500042 -50.608158 -125.55299
  71. 429737500 -39.49865 -87.925888 -15.768126 -25.870119 -1.6137398 -46.560898
  72. -15.756283 -25.906502 -74.112823 -93.561935 -59.226101 -58.54623
  73. -1.6217877 -46.567924 -59.321663 -53.369888 -48.844105 -125.06399
To copy to clipboard, switch view to plain text mode