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From: "xry111 at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/111669] bogus -Wnonnull in conditionally executed
 code
Date: Wed, 04 Oct 2023 01:44:44 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D111669

Xi Ruoyao <xry111 at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |xry111 at gcc dot gnu.org

--- Comment #1 from Xi Ruoyao <xry111 at gcc dot gnu.org> ---
The warning given for the reduced test case is correct because it does not =
make
sense.  It should be just rewritten as

int GetSystemDirectory16(char *path, int count)
{
    if (GetWindowsDirectoryA())
        __builtin_unreachable();

    return 0;
}

because in the case if GetWindowsDirectoryA() returns non-zero, the code al=
ways
invoke undefined behavior.

I'm not sure about the original file.c, but AFAIK GCC developers are keepin=
g to
say "hey, don't use -Werror".=