Exit-time SIGSEGV — static QQmlComponent delegate destroyed after QApplication (deleteLater teardown)

[lmartin]

App segfaults at process exit (SIGSEGV) inside the C-runtime exit handlers, while destroying a function-local static std::unique_ptr delegate cache. The static outlives QGuiApplication/QCoreApplication, and its custom deleter calls QObject::deleteLater(), which dereferences already-destroyed Qt application/thread state.