successes:
---- $DIR/display-output.rs - foo (line 9) stdout ----
-warning: trait objects without an explicit `dyn` are deprecated
- --> $DIR/display-output.rs:13:12
- |
-LL | fn foo(x: &std::fmt::Display) {}
- | ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::fmt::Display`
- |
- = note: `#[warn(bare_trait_objects)]` on by default
- = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
- = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
-
warning: unused variable: `x`
--> $DIR/display-output.rs:11:5
|
warning: unused variable: `x`
--> $DIR/display-output.rs:13:8
|
-LL | fn foo(x: &std::fmt::Display) {}
+LL | fn foo(x: &dyn std::fmt::Display) {}
| ^ help: if this is intentional, prefix it with an underscore: `_x`
warning: function is never used: `foo`
--> $DIR/display-output.rs:13:4
|
-LL | fn foo(x: &std::fmt::Display) {}
+LL | fn foo(x: &dyn std::fmt::Display) {}
| ^^^
|
note: the lint level is defined here
| ^^^^^^
= note: `#[warn(dead_code)]` implied by `#[warn(unused)]`
-warning: 4 warnings emitted
+warning: 3 warnings emitted