rust/tests/ui/feature-gates/feature-gate-unsized_locals.stderr
Nilstrieb 41e8d152dc Show number in error message even for one error
Co-authored-by: Adrian <adrian.iosdev@gmail.com>
2023-11-24 19:15:52 +01:00

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error[E0277]: the size for values of type `(dyn FnOnce() + 'static)` cannot be known at compilation time
--> $DIR/feature-gate-unsized_locals.rs:1:6
|
LL | fn f(f: dyn FnOnce()) {}
| ^ doesn't have a size known at compile-time
|
= help: the trait `Sized` is not implemented for `(dyn FnOnce() + 'static)`
= help: unsized fn params are gated as an unstable feature
help: you can use `impl Trait` as the argument type
|
LL | fn f(f: impl FnOnce()) {}
| ~~~~
help: function arguments must have a statically known size, borrowed types always have a known size
|
LL | fn f(f: &dyn FnOnce()) {}
| +
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0277`.