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