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warning: struct is never used: `S`
--> $DIR/macro-span-replacement.rs:17:14
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LL | $b $a; //~ WARN struct is never used
| ^
...
LL | m!(S struct);
| ------------- in this macro invocation
|
note: lint level defined here
--> $DIR/macro-span-replacement.rs:13:9
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LL | #![warn(unused)]
| ^^^^^^
= note: #[warn(dead_code)] implied by #[warn(unused)]
|
