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error[E0308]: mismatched types
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--> $DIR/if-typeck.rs:9:8
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LL | if f { }
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| ^ expected `bool`, found fn item
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= note: expected type `bool`
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found fn item `fn() {f}`
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error: aborting due to 1 previous error
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For more information about this error, try `rustc --explain E0308`.
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