error[E0282]: type annotations needed for `&_` --> $DIR/issue-12187-2.rs:6:9 | LL | let &v = new(); | ^^ ----- type must be known at this point | help: consider giving this pattern a type, where the type for type parameter `T` is specified | LL | let &v: &T = new(); | ++++ error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0282`.