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error[E0407]: method `from` is not a member of trait `Fn`
--> $DIR/issue-87558.rs:6:5
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LL | fn from() {}
| ^^^^^^^^^^^^ not a member of trait `Fn`
error[E0183]: manual implementations of `Fn` are experimental
--> $DIR/issue-87558.rs:3:6
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LL | impl Fn(&isize) for Error {
| ^^^^^^^^^^ manual implementations of `Fn` are experimental
|
= help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
error[E0229]: associated type bindings are not allowed here
--> $DIR/issue-87558.rs:3:6
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LL | impl Fn(&isize) for Error {
| ^^^^^^^^^^ associated type not allowed here
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help: parenthesized trait syntax expands to `Fn<(&isize,), Output=()>`
--> $DIR/issue-87558.rs:3:6
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LL | impl Fn(&isize) for Error {
| ^^^^^^^^^^
error: aborting due to 3 previous errors
Some errors have detailed explanations: E0183, E0229, E0407.
For more information about an error, try `rustc --explain E0183`.
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