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error[E0282]: type annotations needed
--> $DIR/infer-signature-from-impl.rs:17:16
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LL | needs_foo(|x| {
| ^
LL | x.to_string();
| - type must be known at this point
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help: consider giving this closure parameter an explicit type
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LL | needs_foo(|x: /* Type */| {
| ++++++++++++
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0282`.
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