[Bug c++/83974] [8 Regression] ICE in cxx_eval_constant_expression

[dmalcolm at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83974

--- Comment #3 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Candidate patch:
  https://gcc.gnu.org/ml/gcc-patches/2018-01/msg01955.html