Two enum fields in a struct consume separate storage slots

Source

// SPDX-License-Identifier: MIT
pragma solidity 0.8.35;

/* ===ARENA-MANIFEST===
{"deploy":{"contract":"C","args":[],"value":0},"entry":{"function":"run","args":[],"value":0},"lane":"S","feature":"two-enum-struct-storage-layout"}
===END-ARENA-MANIFEST=== */

enum E {
    A,
    B
}

struct S {
    E x;
    E y;
}

contract C {
    S internal beforeMarker;
    uint256 public marker;

    function run() external returns (uint256) {
        marker = 7;
        return marker;
    }
}