Qt 6.2 - EGLFS app incorrect destruction

therealmatiss

Hello!

I was profiling my Qt 6/QML program on Nvidia Jetson TX2 device (Ubuntu 18.04, Qt 6.2.2, EGLFS display) with GCC Address sanitizer and I noticed that every time it doesn't cleanly exit - it always has SUMMARY: AddressSanitizer: 141686 byte(s) leaked in 1185 allocation(s). Exactly same bytes in same allocation count.

I thought it was an issue with my code but then I created single EGLFS Qt6/QML program with one screen and it happens as well. This is the minimal code needed for this to happen. I have attached the AddressSanitizer log as well - all issues looks like are with EGLFS.

int main(int argc, char* argv[]) {
  initLogger();

  QGuiApplication app(argc, argv);
  QQmlApplicationEngine engine;

  // Signal handler
  initializeSignalHandler(Daemon::getInstance(), app, engine);

  // Start program
  // This is simply a black rectangle QML screen, nothing happens here
  const QUrl url(u"qrc:/main.qml"_qs); 
  engine.load(url);
  auto main_ret = app.exec();

// Here I press CTRL + C and my signal handler calls:
// engine.exit(0);
// app.exit(0);

// This happens after app.exit() - signal handler continues to exit and destroy all objects 
  SPDLOG_WARN("Cleaning up resources & exiting");
  return main_ret;
}

These are my Qt app running parameters:

QT_QPA_PLATFORM=eglfs
QT_QPA_EGLFS_INTEGRATION=eglfs_kms_egldevice

Attachment (Address Sanitizer output):
https://drive.google.com/file/d/1R_v5AgRSB6wxGiBRws_BLrFpbof7QmLq/view?usp=drive_link

What is the issue here? Is this a Qt bug?