QImage crash when saving image(Qt5.0.2) on mac osx 10.8.3

  • Codes

    @#include <functional>

    #include <QApplication>
    #include <QtConcurrent/QtConcurrentMap>
    #include <QImage>
    #include <QLabel>

    //QMutex mutex;

    int process_image_impl(QString const &name)
    QImage image(name);

         //QMutexLocker(&QMutex);  you have to lock it to prevent undefined behavior
         image.save("save/" + name);       
    return 0;


    int main(int argc, char *argv[])
    QApplication a(argc, argv);

    namespace ph = std::placeholders;
    QStringList image_name;
    for(size_t i = 0; i != 10; ++i){
        image_name <<("onebit_" + QString::number(30 + i) + ".png");
    QtConcurrent::blockingMapped(image_name, std::bind<int>(process_image_impl, ph::_1));
    QLabel w;
    return a.exec(&#41;;


    Sometimes this would crash(race condition?) if you don't lock the save function
    Is this a bug? Or a behavior of save?In Qt4 I haven't found this kind of problem yet

    Sorry, I don't know how to trace the bugs by callstack on mac yet
    It wouldn't generate the callstack trace like this page show


    These are part of the error messages after the .app crash
    Anyone know how to decipher the messages?
    Could I find out the program crash on which line by the messages?
    Or I have an easier way to map the address to source codes?

    "error messages":http://www.flickr.com/photos/92283971@N04/8678167798/in/photostream

    Should I treat this as a bug and report?

    ps : there are the other small bug, the SLOT aboutQt will always show you you are using Qt5.0.1 but not Qt5.0.2

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