------- Comment #3 from benjamin at smedbergs dot us 2006-08-10 20:46 ------- This cast in particular doesn't need RTTI, because the offset to the most derived class is in the vtable. Mozilla uses this cast to determine the concrete type for logging purposes, without needing or wanting RTTI information.
-- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28687
