[xiphias2]

let x = Bar::Variant { a: 42 }; //~ ERROR

Of course it's an error, as Bar doesn't have a field called ,,a''

[mark-simulacrum]

Thanks for pointing this out! Unfortunately, unlike most of our docs we don't yet have testing in place for the code examples on the blog. I've just pushed up a fix though so once that propagates this should be fixed.