[Bug c++/100649] [9/10/11/12 Regression] ICE in coerce_template_parms (releases) or cxx_eval_constant_expression (trunk)

[ebotcazou at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100649

--- Comment #4 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> Confirmed.  Compiled without errors with GCC 7.

The error is properly issued in C++11 mode (-std=c++11):

t.cpp: In member function 'void B<T>::foo(const A<32>&)':
t.cpp:12:23: error: 'mesg' is not a constant expression
   12 |       A<2 + mesg.size()> local_mesg;
      |                       ^