https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68929
--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> --- Seems related to c++/55722
[Bug c++/68929] GCC hangs in nested template instantiations even after static_assert fails.
paolo.carlini at oracle dot com Fri, 27 May 2016 03:02:40 -0700
