[Bug c++/116049] friend function with explicit object parameter

[fchelnokov at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116049

--- Comment #1 from Fedor Chelnokov <fchelnokov at gmail dot com> ---
And this program
```
struct A {
    friend bool operator == (this const A&, const A&) = default;
};

int main() {
    A{} == A{};
}
```
results in 

internal compiler error: Segmentation fault
    6 |     A{} == A{};
      |              ^
0x202ef4c internal_error(char const*, ...)
        ???:0
0x7a50e0 build_new_op(op_location_t const&, tree_code, int, tree_node*,
tree_node*, tree_node*, tree_node*, tree_node**, int)
        ???:0
0x98a7a2 build_x_binary_op(op_location_t const&, tree_code, tree_node*,
tree_code, tree_node*, tree_code, tree_node*, tree_node**, int)
        ???:0
0x90e414 c_parse_file()
        ???:0
0xa0c4d9 c_common_parse_file()
        ???:0

Online demo: https://gcc.godbolt.org/z/zr6Y8vPss