LL | fn trait_method2(&self, _color: &Color);
| ^^^^^^ help: consider passing by value instead: `Color`
-error: aborting due to 15 previous errors
+error: this argument (N byte) is passed by reference, but would be more efficient if passed by value (limit: N byte)
+ --> $DIR/trivially_copy_pass_by_ref.rs:108:21
+ |
+LL | fn foo_never(x: &i32) {
+ | ^^^^ help: consider passing by value instead: `i32`
+
+error: this argument (N byte) is passed by reference, but would be more efficient if passed by value (limit: N byte)
+ --> $DIR/trivially_copy_pass_by_ref.rs:113:15
+ |
+LL | fn foo(x: &i32) {
+ | ^^^^ help: consider passing by value instead: `i32`
+
+error: aborting due to 17 previous errors