Destructors in C++ are implicitly noexcept, so the try-catch around QSettingsPrivate::flush() is not to prevent throwing from a dtor (anymore), but to prevent a throw statement inside flush() from taking down the whole application. We don't need to care about abi::__forced_unwind here, since we couldn't re-throw it even if we wanted to (throw in noexcept function is direct std::terminate(); at least by not re-throwing, the user will get a nice complaint message from the runtime). Pick-to: 6.3 Change-Id: I3b24a4be9aeb74637a58725540990b535d005bdd Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>