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  1. Qt
  2. QTBUG-140076

[REG 6.9.0 -> 6.9.1] Memory leaks on QPainter::drawText() in static QGuiApplication

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    • Icon: Bug Bug
    • Resolution: Unresolved
    • Icon: P1: Critical P1: Critical
    • None
    • 6.8.4, 6.9.1, 6.11
    • Core: Threads
    • None
    • Ubuntu 24.04 LTS
      clang 18.1.3

      1. Have a Qt build with ASAN.
        I used clang 18.1.3 to build the current dev branch with switches including -static -sanitize address, see attached config.opt.
      2. Use that to build the attached demo project: 
        #include <QGuiApplication>
#include <QImage>
#include <QPainter>

int main(int argc, char *argv[]) {
    static QGuiApplication qga(argc, argv);
    QImage image(377, 233, QImage::Format_RGB32);
    QPainter painter(&image);
    painter.drawText(0,0,"Qt");
    return 0;
}
      3. Run the project.
        ASAN reports memory leaks, see attached logs.

        1. main.cpp
          0.3 kB
        2. globalGuiApp.log
          9 kB
        3. firstBad.log
          338 kB
        4. currentDev.log
          338 kB
        5. config.opt
          0.2 kB
        6. CMakeLists.txt
          0.3 kB
        7. 691.log
          337 kB
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            thiago Thiago Macieira
            rlohning Robert Löhning
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              Created:
              Updated:

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