1 error[E0121]: the placeholder `_` is not allowed within types on item signatures for return types
2 --> $DIR/issue-77179.rs:7:22
4 LL | fn test() -> Pointer<_> {
7 | | not allowed in type signatures
8 | help: replace with the correct return type: `Pointer<i32>`
10 error: aborting due to previous error
12 For more information about this error, try `rustc --explain E0121`.