[Bug c++/71912] [6/7 regression] flexible array in struct in union rejected

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71912

--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
Patch posted for review:
  https://gcc.gnu.org/ml/gcc-patches/2016-07/msg01505.html