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error: expected identifier, found keyword `fn`
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--> $DIR/keyword-fn-as-identifier.rs:4:9
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LL | let fn = "foo";
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| ^^ expected identifier, found keyword
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help: escape `fn` to use it as an identifier
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LL | let r#fn = "foo";
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| ++
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error: aborting due to 1 previous error
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