The use of Q_ASSERT(false) is bogus as we don't need to test here, but
want to signal unreachability.
Q_UNREACHABLE_RETURN allows us to tell the compiler that the point
can't be reached while also getting rid of the no return error.
Task-number: QTBUG-114689
Change-Id: I007cd243055237bcc21772a4130a6c1a44fd882d
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>
(cherry picked from commit ce39beea0cd49bb93b0e345194265dd8081094cd)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
6e395ef151