Qt should not SIGABRT on initialization failure

If all platform plugins failed to initialize, Qt calls qFatal which in turn calls abort. This causes SIGABRT and may generate a coredump.

In the most common case it's because the connection to the display (Wayland, X11, whatever) is missing or failed, and a coredump will not help analyzing that at all.

I suggest using _exit(1) instead, which has practically the same behaviour but avoids SIGABRT and therefore also a coredump.