[Bug c++/44267] SFINAE does not handle down static_cast over virtual inheritance

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44267

--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> 2011-09-23 
21:38:33 UTC ---
Jason, can you help me triaging this PR? Thanks..