01f65afa4a
This commit improves the diagnostic when a type parameter is expected and a closure is found, noting that each closure has a distinct type and therefore could not always match the caller-chosen type of the parameter. Signed-off-by: David Wood <david@davidtw.co>
15 lines
599 B
Text
15 lines
599 B
Text
error[E0308]: mismatched types
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--> $DIR/issue-51154.rs:2:30
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LL | fn foo<F: FnMut()>() {
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| - this type parameter
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LL | let _: Box<F> = Box::new(|| ());
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| ^^^^^ expected type parameter `F`, found closure
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= note: expected type parameter `F`
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found closure `[closure@$DIR/issue-51154.rs:2:30: 2:35]`
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= help: every closure has a distinct type and so could not always match the caller-chosen type of parameter `F`
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error: aborting due to previous error
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For more information about this error, try `rustc --explain E0308`.
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