[Bug c++/59761] ICE: g++ segfaults in test case involving constexpr default constructor with uninitialized member and template type alias

[mizvekov at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59761

--- Comment #1 from Matheus Izvekov <mizvekov at gmail dot com> ---
Created attachment 31804
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=31804&action=edit
gcc rejects this, but without ICE

Same thing as test_bad.cc, except that std::enable_if is used directly instead
of enable_if_t