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warning: unused attribute
--> $DIR/macro-use-all-and-none.rs:7:12
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LL | #[macro_use()]
| ^^ help: remove these parentheses
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= note: using `macro_use` with an empty list is equivalent to not using a list at all
note: the lint level is defined here
--> $DIR/macro-use-all-and-none.rs:4:9
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LL | #![warn(unused_attributes)]
| ^^^^^^^^^^^^^^^^^
warning: 1 warning emitted
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