error[E0599]: no method named `finish` found for struct `DefaultHasher` in the current scope --> $DIR/import-trait-for-method-call.rs:6:7 | LL | h.finish() | ^^^^^^ method not found in `DefaultHasher` --> $SRC_DIR/core/src/hash/mod.rs:LL:COL | = note: the method is available for `DefaultHasher` here | = help: items from traits can only be used if the trait is in scope help: the following trait is implemented but not in scope; perhaps add a `use` for it: | LL + use std::hash::Hasher; | error[E0599]: the method `as_ref` exists for reference `&dyn Bar`, but its trait bounds were not satisfied --> $DIR/import-trait-for-method-call.rs:15:7 | LL | trait Bar {} | --------- doesn't satisfy `dyn Bar: AsRef<_>` ... LL | x.as_ref(); | ^^^^^^ method cannot be called on `&dyn Bar` due to unsatisfied trait bounds | = note: the following trait bounds were not satisfied: `dyn Bar: AsRef<_>` which is required by `&dyn Bar: AsRef<_>` = help: items from traits can only be used if the trait is implemented and in scope = note: the following trait defines an item `as_ref`, perhaps you need to implement it: candidate #1: `AsRef` error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0599`.