id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
3730	compilation problem with is_virtual_base_of when class contains abstract methods	Barry Searle <barry.searle@…>	John Maddock	"When a virtual base class contains an abstract method that is implemented in the inheritance tree, rather than the final class, gcc won't compile serialized classes. This happens with gcc 4.3.1 on openSuSE 11.0 and gcc 4.4.1 on 11.2.

I'm attaching a modified version of the test_diamond.cpp program from the serialization library. The base class now contains an abstract method, the final class in the example has been renamed to intermediate and a new final class is derived directly from intermediate. The abstract method is implemented in the intermediate class resulting in a compiler error[[BR]]
/usr/local/boost-r58233/include/boost/type_traits/is_virtual_base_of.hpp:56: error: no unique final overrider for ‘virtual void base::method1()’ in ‘boost::detail::is_virtual_base_of_impl<intermediate, final, mpl_::bool_<true> >::X’[[BR]]
The method looks to be unique to me. If the method is implemented in final rather than intermediate then the problem doesn't occur."	Bugs	closed	Boost 1.42.0	type_traits	Boost 1.41.0	Problem	wontfix		manfred.doudar@…