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warning: struct `S` is never constructed
--> $DIR/macro-span-replacement.rs:7:12
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LL | $b $a;
| ^^
...
LL | m!(S struct);
| ------------ in this macro invocation
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note: the lint level is defined here
--> $DIR/macro-span-replacement.rs:3:9
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LL | #![warn(unused)]
| ^^^^^^
= note: `#[warn(dead_code)]` implied by `#[warn(unused)]`
= note: this warning originates in the macro `m` (in Nightly builds, run with -Z macro-backtrace for more info)
warning: 1 warning emitted
|
