error[E0282]: type annotations needed for `SmallCString` --> $DIR/issue-98299.rs:4:36 | LL | SmallCString::try_from(p).map(|cstr| cstr); | ^^^^ | help: consider giving this closure parameter an explicit type, where the value of const parameter `N` is specified | LL | SmallCString::try_from(p).map(|cstr: SmallCString| cstr); | +++++++++++++++++ error: aborting due to previous error For more information about this error, try `rustc --explain E0282`.