1 error: unused implementer of `Critical` that must be used
2 --> $DIR/must_use-trait.rs:21:5
4 LL | get_critical(); //~ ERROR unused implementer of `Critical` that must be used
7 note: lint level defined here
8 --> $DIR/must_use-trait.rs:1:9
10 LL | #![deny(unused_must_use)]
13 error: aborting due to previous error