solidity/test/libsolidity/syntaxTests/specialFunctions/abidecode/abi_decode_struct.sol

pragma abicoder v1;
struct S {
    uint x;
}

contract C {
    function f() public pure {
        abi.decode("1234", (S));
    }
}
// ----
// TypeError 9611: (118-119='S'): Decoding type struct S memory not supported.