1 error: expected one of `:`, `@`, or `|`, found `)`
2 --> $DIR/param-attrs-2018.rs:3:41
4 LL | trait Trait2015 { fn foo(#[allow(C)] i32); }
5 | ^ expected one of `:`, `@`, or `|`
7 = note: anonymous parameters are removed in the 2018 edition (see RFC 1685)
8 help: if this is a `self` type, give it a parameter name
10 LL | trait Trait2015 { fn foo(#[allow(C)] self: i32); }
12 help: if this is a parameter name, give it a type
14 LL | trait Trait2015 { fn foo(#[allow(C)] i32: TypeName); }
16 help: if this is a type, explicitly ignore the parameter name
18 LL | trait Trait2015 { fn foo(#[allow(C)] _: i32); }
21 error: aborting due to previous error