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Debug runs but release crashes on launch



  • Hi,
    I am a new Qt developer. I have started with a simple app which runs fine in the debug build, but which crashes on launch in the release build. When I comment out code, the release works until I execute;

    this->ui->setupUi(this);

    It hangs in some Qt initialization, but only in the release build!

    Any suggestions greatly appreciated.

    john



  • Past more code. In debug uninitialized variables could have a different values then in release build, so it's important to have a initialized all variables.



  • I had the same trouble.
    Sometimes the debug mode misses some exception messages.

    1. Choose Build-> Clear All
    2. Run QMake
    3. Build all

    If this fails, check out step by step, each line in debug mode, you will surely find it.


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