http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54253
--- Comment #3 from mrks at koios dot de 2012-08-14 14:45:31 UTC --- Created attachment 28012 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28012 first base polymorphic multiple inheritance, first base class is polymorphic -> complains about uninitialized member Derived::<anonymous> If Base::Base is the default ctor (no arguments), it doesn't complain but segfaults.