https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70057
Martin Sebor <msebor at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Last reconfirmed| |2017-02-27 Ever confirmed|0 |1 Known to fail| |5.3.0, 6.3.0, 7.0 --- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> --- Confirmed. In GCC 6 and 7 the C++ front end issues not just one or two but three diagnostics for the test case in comment #0: $ cat t.C && gcc -S -Wall -Wextra -Wpedantic t.C template <int N> struct S { }; S<(__INT_MAX__ + 1)> s; t.C:2:16: warning: integer overflow in expression [-Woverflow] S<(__INT_MAX__ + 1)> s; ^ t.C:2:20: error: overflow in constant expression [-fpermissive] S<(__INT_MAX__ + 1)> s; ^ t.C:2:20: error: overflow in constant expression [-fpermissive] t.C:2:20: note: in template argument for type ‘int’