error: allow, cfg, cfg_attr, deny, expect, forbid, and warn are the only allowed built-in attributes in function parameters --> $DIR/attrs-on-params.rs:3:13 | LL | fn function(#[inline] param: u32) { | ^^^^^^^^^ error[E0518]: attribute should be applied to function or closure --> $DIR/attrs-on-params.rs:3:13 | LL | fn function(#[inline] param: u32) { | ^^^^^^^^^----------- | | | not a function or closure error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0518`.