``` rust enum Test { Variant, Variant2(&'static str) } fn main(){ let y = Test::Variant2("Hello"); let x = Test::Variant("World"); } ``` results in ``` <anon>:8:13: 8:35 error: expected function, found `Test` <anon>:8 let x = Test::Variant("World"); ^~~~~~~~~~~~~~~~~~~~~~ ``` The error should say something about variant not being able to contain any data instead.