solidity/test/libsolidity/semanticTests/array/copying/array_copy_cleanup_uint40.sol

// Issue 9832: Test to see if cleanup is performed properly after array copying
contract C {
    uint40[] x;
    function f() public returns(bool) {

        x.push(42); x.push(42); x.push(42); x.push(42);
        x.push(42); x.push(42); x.push(42); x.push(42);
        x.push(42); x.push(42); x.push(42); x.push(42);
        x.push(42); x.push(42); x.push(42); x.push(42);
        x.push(42); x.push(42); x.push(42); x.push(42);

        uint40[] memory y = new uint40[](1);
        y[0] = 23;
        x = y;

        assembly { sstore(x.slot, 20) }

        assert(x[0] == 23);
        assert(x[1] == 0);
        assert(x[2] == 0);
        assert(x[3] == 0);

        assert(x[4] == 0);
        assert(x[5] == 0);
        assert(x[6] == 0);
        assert(x[7] == 0);

        assert(x[8] == 0);
        assert(x[9] == 0);
        assert(x[10] == 0);
        assert(x[11] == 0);

        assert(x[12] == 0);
        assert(x[13] == 0);
        assert(x[14] == 0);
        assert(x[15] == 0);

        assert(x[16] == 0);
        assert(x[17] == 0);
        assert(x[18] == 0);
        assert(x[19] == 0);

        return true;

    }
}
// ----
// f() -> true
// gas irOptimized: 146936
// gas legacy: 155961
// gas legacyOptimized: 153588