What's wrong with QMainWindow::show()

  • I installed Kubuntu 16.04. The Qt version is 5.5.1.
    g_mainWin=new MainWindow;
    The program was crash on g_mainWin->show(), but it was running fine in Linuxmint 17.1. How can I find the problem. I have no idea. Qt Creator debug had no more information with the problem. SOS.

  • Qt Champions 2017

    Hi and welcome
    You should try with default GUI project and see it run so we know
    qt install is ok.

    Then can you show the constructor of MainWindow ?
    No reason to crash on show unless its some of the other widgets that crash.

  • @mrjj It's very strange. It was woking when I use valgrind Memory Analyzer in Qt Creator. But it was crash when run or press F5 to debug.

  • Qt Champions 2017


    did you try with break point in constructor and single step?

    Does a default project works?

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