Modifying slot causes execution error.

[Subway2023]

Version: v0.3.3: Atlantis
Description: If _data.slot := slot is commented out, the error does not occur.

contract C {
    struct S {
        uint a;
        uint b;
    }

    mapping(uint => S) public mappingAccess;

    function data() internal view returns (S storage _data) {
        _data = mappingAccess[20];

        bytes32 slot = keccak256(abi.encode(uint(1), uint(0)));
        assembly {
            // _data.slot := slot
        }
    }

    function get() public view returns (uint) {
        return data().a;
    }
}

Reproduction: I set up a Solang compilation and execution environment to test the program.

solang/target/debug/vmRunNoPara test.sol C get

The execution error is as follows:

Contract name: C
function new for tVdNkXJPLk3bGwfGamfSaArTJj3buT5TUUZmUK6WDd6
input: 872ccdc6190148bc
running bpf with calldata:872ccdc6190148bc
program: tVdNkXJPLk3bGwfGamfSaArTJj3buT5TUUZmUK6WDd6
static: length:3f0 000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
offset:410 prev:10 next:10 length:0 allocated:0 
thread 'main' panicked at src/tests/solana.rs:1778:52:
account 'systemProgram' is missing
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
function_call_with_account causes error