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When encountering an unmet trait bound, point at local type that doesn't implement the trait: ``` error[E0277]: the trait bound `Bar<T>: Foo` is not satisfied --> $DIR/issue-64855.rs:9:19 | LL | pub struct Bar<T>(<Self as Foo>::Type) where Self: ; | ^^^^^^^^^^^^^^^^^^^ unsatisfied trait bound | help: the trait `Foo` is not implemented for `Bar<T>` --> $DIR/issue-64855.rs:9:1 | LL | pub struct Bar<T>(<Self as Foo>::Type) where Self: ; | ^^^^^^^^^^^^^^^^^ ```
52 lines
1.8 KiB
Plaintext
52 lines
1.8 KiB
Plaintext
error: `async` trait implementations are unsupported
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--> $DIR/impl-header.rs:5:6
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LL | impl async Fn<()> for F {}
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| ^^^^^
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error[E0658]: the precise format of `Fn`-family traits' type parameters is subject to change
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--> $DIR/impl-header.rs:5:12
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LL | impl async Fn<()> for F {}
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| ^^^^^^
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= note: see issue #29625 <https://github.com/rust-lang/rust/issues/29625> for more information
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= help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
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= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
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error[E0183]: manual implementations of `Fn` are experimental
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--> $DIR/impl-header.rs:5:12
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LL | impl async Fn<()> for F {}
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| ^^^^^^ manual implementations of `Fn` are experimental
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= help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
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error[E0046]: not all trait items implemented, missing: `call`
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--> $DIR/impl-header.rs:5:1
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LL | impl async Fn<()> for F {}
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| ^^^^^^^^^^^^^^^^^^^^^^^ missing `call` in implementation
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= help: implement the missing item: `fn call(&self, _: ()) -> <Self as FnOnce<()>>::Output { todo!() }`
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error[E0277]: expected a `FnMut()` closure, found `F`
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--> $DIR/impl-header.rs:5:23
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LL | impl async Fn<()> for F {}
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| ^ expected an `FnMut()` closure, found `F`
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help: the trait `FnMut()` is not implemented for `F`
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--> $DIR/impl-header.rs:3:1
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LL | struct F;
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| ^^^^^^^^
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= note: wrap the `F` in a closure with no arguments: `|| { /* code */ }`
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note: required by a bound in `Fn`
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--> $SRC_DIR/core/src/ops/function.rs:LL:COL
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error: aborting due to 5 previous errors
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Some errors have detailed explanations: E0046, E0183, E0277, E0658.
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For more information about an error, try `rustc --explain E0046`.
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