[Bug c++/116020] Incorrect treatment of (this void) parameter

[fchelnokov at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116020

--- Comment #1 from Fedor Chelnokov <fchelnokov at gmail dot com> ---
Another problematic problem example is as follows:

struct A {
    static void f();
};

void foo() {
    A::f(); //ok
}

void A::f(this void) {}

int main() {
    A::f(); //error in GCC after A::f definition
}

Here the definition of declared no-argument member function with (this void) is
accepted but makes this function no longer callable. Clang has no issue with it
again. Online demo: https://gcc.godbolt.org/z/vKfzo7fe9