https://clickhouse-test-reports.s3.yandex.net/20492/c5b96a522e29b38eae3f6c2d945540dd234e3c34/fuzzer_msan/server.log

```
for i in {1..100}; do clickhouse-client --query "SELECT toUInt8(assumeNotNull(cast(cast(NULL, 'Nullable(String)'), 'Nullable(Enum8(\'Hello\' = 1))')))"; done

160
224
128
192
64
64
32
160
128
192
128
224
128
160
0
96
64
32
192
224
64
96
224
96
128
192
192
128
...
```
{
        return [element_wrappers = getElementWrappers(from_kv_types, to_kv_types), from_kv_types, to_kv_types]
            (ColumnsWithTypeAndName & arguments, const DataTypePtr &, const ColumnNullable * nullable_source, size_t input_rows_count) -> ColumnPtr
        {
            const auto * col = arguments.front().column.get();
            const auto & column_map = typeid_cast<const ColumnMap &>(*col);
            const auto & nested_data = column_map.getNestedData();
            Columns converted_columns(2);
            for (size_t i = 0; i < 2; ++i)
            {
                ColumnsWithTypeAndName element = {{nested_data.getColumnPtr(i), from_kv_types[i], ""}};
                converted_columns[i] = element_wrappers[i](element, to_kv_types[i], nullable_source, input_rows_count);
            }
            return ColumnMap::create(converted_columns[0], converted_columns[1], column_map.getNestedColumn().getOffsetsPtr());
        };
    }
    
    WrapperType createArrayToMapWrrapper(const DataTypes & from_kv_types, const DataTypes & to_kv_types) const