``` rust #[feature(struct_variant)]; enum Foo { Bar { num: int} } fn test_foo() { let bar = Bar { num: 1 }; let Bar { num } = bar; } ``` task 'rustc' failed at 'explicit failure', /Users/pzol/rust/rust/src/libsyntax/diagnostic.rs:75 task '<main>' failed at 'explicit failure', /Users/pzol/rust/rust/src/librustc/lib.rs:453 rustc -v rustc 0.10-pre (29070c3 2014-01-14 23:01:51 -0800) host: x86_64-apple-darwin