[Bug c++/53786] [C++11] alias template causes g++ segfault

[mustrumr97 at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53786

--- Comment #2 from Hristo Venev <mustrumr97 at gmail dot com> 2012-06-30 
15:19:29 UTC ---
Reduced:

template<class... x>
class list{};
template<class a, class... b>
using tail=list<b...>;
template<class... x>
using tail2=tail<x...>;