[Bug c++/114561] Comma operator with forwarding reference to pointer raises invalid lvalue required error

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114561

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Further reduced:

void create(void* u) {
    const void* const& r = ( (void)0, u );
}

void test_func() {
    create(0);
}


The result of (0, u) is an lvalue of type void* which should then be converted
to a const void* prvalue, which is then bound to the reference.