[Bug c++/70323] [6 regression] missing error on integer overflow in constexpr function result converted to bool

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70323

--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
I see the problem: It's -Wall that suppresses the error.