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Help : Segmentation fault when using a 3rd library

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  • SGaistS Offline
    SGaistS Offline
    SGaist
    Lifetime Qt Champion
    wrote on last edited by
    #7

    Then I suppose you are also new at programming ?

    Can you show the code ?

    Interested in AI ? www.idiap.ch
    Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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    • T Offline
      T Offline
      Tissues
      wrote on last edited by
      #8

      I have some basic knowledge in C++ programming and one semester's course in data structure and algorithm, but I'm ignorant in interface development.

      I downloaded my library on this website:
      http://genie.sis.pitt.edu/index.php/downloads
      followed tutorial on this website:
      http://genie.sis.pitt.edu/wiki/SMILE_Documentation
      and wrote my own code:
      @#include "widget.h"
      #include <QApplication>
      #include "smile.h"

      int main(int argc, char *argv[])
      {
      DSL_network myNetwork;
      QApplication a(argc, argv);
      Widget w;
      w.show();

      return a.exec&#40;&#41;;
      

      }
      @

      Debugging process stopped at
      @DSL_network myNetwork;@

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      • SGaistS Offline
        SGaistS Offline
        SGaist
        Lifetime Qt Champion
        wrote on last edited by
        #9

        And what error are you getting ?

        Interested in AI ? www.idiap.ch
        Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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        • T Offline
          T Offline
          Tissues
          wrote on last edited by
          #10

          A message box with a title "Signal received", reading

          The inferior stopped because it received a signal from the Operating System.
          Signal name: SIGSEGV
          Signal meaning: Segmentatio fault

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          • SGaistS Offline
            SGaistS Offline
            SGaist
            Lifetime Qt Champion
            wrote on last edited by
            #11

            Since you are using MinGW, your should already have a debugger then just click on the other green arrow, then one with the little bug, you should get more information

            Interested in AI ? www.idiap.ch
            Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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            • T Offline
              T Offline
              Tissues
              wrote on last edited by
              #12

              Application Output:
              Debugging starts
              can't find linker symbol for virtual table for 'QApplication' value

              There are many warnings. Some read 'ignoring #pragma comment' while others 'unused parameter'. What is the problem?

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              • SGaistS Offline
                SGaistS Offline
                SGaist
                Lifetime Qt Champion
                wrote on last edited by
                #13

                Did you download the MinGW version ? If so, it's been compiled with MinGW 4.6.2 which is not compatible with 4.8

                Interested in AI ? www.idiap.ch
                Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                • T Offline
                  T Offline
                  Tissues
                  wrote on last edited by
                  #14

                  Oh, I am now using Qt creator 5.2.0 and MinGW4.8. How can I reduce MinGW to a 4.6.2 version?

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                  • SGaistS Offline
                    SGaistS Offline
                    SGaist
                    Lifetime Qt Champion
                    wrote on last edited by
                    #15

                    You would need to install it by hand and also recompile Qt with it

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                    Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                    • SGaistS Offline
                      SGaistS Offline
                      SGaist
                      Lifetime Qt Champion
                      wrote on last edited by
                      #16

                      However, the download page also mention that you can request a build, so you could try to ask them about a version using MinGW 4.8

                      Interested in AI ? www.idiap.ch
                      Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                      • T Offline
                        T Offline
                        Tissues
                        wrote on last edited by
                        #17

                        Thx for your reply! I have downloaded Mingw32 4.6.2, but I want to ask how to recompile Qt with it.

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                        • SGaistS Offline
                          SGaistS Offline
                          SGaist
                          Lifetime Qt Champion
                          wrote on last edited by
                          #18

                          Just follow the "documentation":http://qt-project.org/doc/qt-5/windows-building.html

                          However, I would recommend trying to ask a build for MinGW 4.8

                          Interested in AI ? www.idiap.ch
                          Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                          • T Offline
                            T Offline
                            Tissues
                            wrote on last edited by
                            #19

                            I've tried to follow the instruction, but it is complex for me. I just copied and pasted MinGW4.6.2 in the directory, and compiled the program. Now it stops at the very beginning and the Application Output window says
                            Debugging starts
                            (Internal error: pc 0x54f558 in read in psymtab, but not in symtab.)
                            (Internal error: pc 0x54f615 in read in psymtab, but not in symtab.)
                            (Internal error: pc 0x54f616 in read in psymtab, but not in symtab.)
                            (Internal error: pc 0x406adb in read in psymtab, but not in symtab.)
                            (Internal error: pc 0x54f615 in read in psymtab, but not in symtab.)
                            (Internal error: pc 0x54f615 in read in psymtab, but not in symtab.)
                            (Internal error: pc 0x406adb in read in psymtab, but not in symtab.)
                            (Internal error: pc 0x406a80 in read in psymtab, but not in symtab.)
                            (Internal error: pc 0x406adb in read in psymtab, but not in symtab.)
                            (Internal error: pc 0x406adc in read in psymtab, but not in symtab.)
                            (Internal error: pc 0x406adb in read in psymtab, but not in symtab.)
                            (Internal error: pc 0x406adb in read in psymtab, but not in symtab.)
                            (Internal error: pc 0x54f615 in read in psymtab, but not in symtab.)
                            (Internal error: pc 0x54f558 in read in psymtab, but not in symtab.)
                            (Internal error: pc 0x54f615 in read in psymtab, but not in symtab.)
                            (Internal error: pc 0x54f616 in read in psymtab, but not in symtab.)
                            (Internal error: pc 0x406adb in read in psymtab, but not in symtab.)
                            (Internal error: pc 0x54f615 in read in psymtab, but not in symtab.)
                            (Internal error: pc 0x54f615 in read in psymtab, but not in symtab.)
                            (Internal error: pc 0x406adb in read in psymtab, but not in symtab.)
                            (Internal error: pc 0x406a80 in read in psymtab, but not in symtab.)
                            (Internal error: pc 0x406adb in read in psymtab, but not in symtab.)
                            (Internal error: pc 0x406adc in read in psymtab, but not in symtab.)
                            (Internal error: pc 0x406adb in read in psymtab, but not in symtab.)
                            (Internal error: pc 0x406adb in read in psymtab, but not in symtab.)

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                            • SGaistS Offline
                              SGaistS Offline
                              SGaist
                              Lifetime Qt Champion
                              wrote on last edited by
                              #20

                              Did you also compile Qt with that version of MinGW ?

                              Interested in AI ? www.idiap.ch
                              Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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