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warning: method `foo` is never used
--> $DIR/coercion-as-explicit-cast.rs:9:8
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LL | trait Foo {
| --- method in this trait
LL | fn foo(&self) {}
| ^^^
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= note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
warning: 1 warning emitted
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