On Monday, 20 January 2020 04:48:41 PST René J.V. Bertin wrote: > Hi, > > I call > > QString arg0 = qApp? qApp->arguments()[0] : QString(); > > in order to get the application name in a function that can also be called > during the global destruction phase. I've never seen issues with that with > Qt <= 5.9 but just had a crash with Qt 5.12.6 :
Sorry, it's a bug in the application code. QCoreApplication keep s a reference to argc. Since main() has exited, the reference is now dangling and will likely result in garbage being read. For this reason and many others,) QCoreApplication should have been destroyed before main() returned. > Regardless of whether this is a regression in QCoreApplication, is there a > safe and cross-platform way to get at the app name in code that might be > called as above? If you're going to need it on shut down, you should save it when you still have access to it. I think glibc has an internal variable that still points to argv, but that's not a portable solution. And if your code is a plugin, you must also deal with the case where the application modifies argv or passes something completely different to QCoreApplication. -- Thiago Macieira - thiago.macieira (AT) intel.com Software Architect - Intel System Software Products _______________________________________________ Interest mailing list Interest@qt-project.org https://lists.qt-project.org/listinfo/interest
