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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/105774] Bogus overflow in constant expression with signed
 char++
Date: Sat, 22 Oct 2022 20:55:56 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105774

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|Bogus overflow in constant  |Bogus overflow in constant
                   |expression with char++      |expression with signed
                   |                            |char++
      Known to fail|                            |5.1.0

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Here is a C++14 testcase (lambdas were not constexpr in C++14) which shows =
the
issue has been there since GCC 5 (which didn't have C++17 support):
constexpr signed char f(void){
    signed char x =3D 127;
    return ++x;
}
int main() {
    constexpr auto _ =3D f();
}=