[Bug c++/78774] [6/7 Regression] ICE in constexpr string literals and templates

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78774

--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
Patch posted for review:
https://gcc.gnu.org/ml/gcc-patches/2016-12/msg01053.html