solidity/test/libsolidity/syntaxTests/bound/bound_to_struct.sol

contract C {
    struct S { uint t; }
    function r() public {
        S memory x;
        x.d;
    }
    using S for S;
}
// ----
// TypeError 4357: (113-114='S'): Library name expected. If you want to attach a function, use '{...}'.