[Bug c++/80971] [7/8 Regression] ICE with 'if constexpr' in template function

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80971

Martin Liška <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2017-06-05
                 CC|                            |jason at gcc dot gnu.org,
                   |                            |marxin at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
It's rejected by older GCC versions (5.1.0-6.3.0):

pr80971.cpp: In function ‘bool foo()’:
pr80971.cpp:8:6: error: expected ‘(’ before ‘constexpr’
   if constexpr (A())
      ^

ICE started with r239338.