error: unused implementer of `Critical` that must be used --> $DIR/must_use-trait.rs:33:5 | LL | get_critical(); | ^^^^^^^^^^^^^^ | note: the lint level is defined here --> $DIR/must_use-trait.rs:1:9 | LL | #![deny(unused_must_use)] | ^^^^^^^^^^^^^^^ error: unused boxed `Critical` trait object that must be used --> $DIR/must_use-trait.rs:34:5 | LL | get_boxed_critical(); | ^^^^^^^^^^^^^^^^^^^^ error: unused boxed boxed `Critical` trait object that must be used --> $DIR/must_use-trait.rs:35:5 | LL | get_nested_boxed_critical(); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: unused boxed `Critical` trait object in tuple element 1 that must be used --> $DIR/must_use-trait.rs:37:5 | LL | get_critical_tuple(); | ^^^^^^^^^^^^^^^^^^^^ error: unused implementer of `Critical` in tuple element 2 that must be used --> $DIR/must_use-trait.rs:37:5 | LL | get_critical_tuple(); | ^^^^^^^^^^^^^^^^^^^^ error: aborting due to 5 previous errors