092ecca5b9
```
error[E0277]: the trait bound `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}: Coroutine` is not satisfied
--> $DIR/gen_block_is_coro.rs:6:13
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LL | fn foo() -> impl Coroutine<Yield = u32, Return = ()> {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Coroutine` is not implemented for `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}`
LL | gen { yield 42 }
| ---------------- return type was inferred to be `{gen block@$DIR/gen_block_is_coro.rs:7:5: 7:8}` here
```
The secondary span label is new.
71 lines
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71 lines
3.3 KiB
Plaintext
error[E0666]: nested `impl Trait` is not allowed
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--> $DIR/nested_impl_trait.rs:6:56
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LL | fn bad_in_ret_position(x: impl Into<u32>) -> impl Into<impl Debug> { x }
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| ----------^^^^^^^^^^-
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| | |
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| | nested `impl Trait` here
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| outer `impl Trait`
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error[E0666]: nested `impl Trait` is not allowed
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--> $DIR/nested_impl_trait.rs:10:42
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LL | fn bad_in_fn_syntax(x: fn() -> impl Into<impl Debug>) {}
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| ----------^^^^^^^^^^-
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| | |
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| | nested `impl Trait` here
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| outer `impl Trait`
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error[E0666]: nested `impl Trait` is not allowed
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--> $DIR/nested_impl_trait.rs:14:37
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LL | fn bad_in_arg_position(_: impl Into<impl Debug>) { }
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| ----------^^^^^^^^^^-
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| | |
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| | nested `impl Trait` here
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| outer `impl Trait`
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error[E0666]: nested `impl Trait` is not allowed
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--> $DIR/nested_impl_trait.rs:19:44
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LL | fn bad(x: impl Into<u32>) -> impl Into<impl Debug> { x }
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| ----------^^^^^^^^^^-
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| | |
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| | nested `impl Trait` here
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| outer `impl Trait`
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error[E0562]: `impl Trait` is not allowed in `fn` pointer return types
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--> $DIR/nested_impl_trait.rs:10:32
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LL | fn bad_in_fn_syntax(x: fn() -> impl Into<impl Debug>) {}
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| ^^^^^^^^^^^^^^^^^^^^^
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= note: `impl Trait` is only allowed in arguments and return types of functions and methods
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error[E0277]: the trait bound `impl Debug: From<impl Into<u32>>` is not satisfied
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--> $DIR/nested_impl_trait.rs:6:46
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LL | fn bad_in_ret_position(x: impl Into<u32>) -> impl Into<impl Debug> { x }
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| ^^^^^^^^^^^^^^^^^^^^^ - return type was inferred to be `impl Into<u32>` here
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| |
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| the trait `From<impl Into<u32>>` is not implemented for `impl Debug`
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= help: the trait `Into<U>` is implemented for `T`
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= note: required for `impl Into<u32>` to implement `Into<impl Debug>`
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error[E0277]: the trait bound `impl Debug: From<impl Into<u32>>` is not satisfied
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--> $DIR/nested_impl_trait.rs:19:34
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LL | fn bad(x: impl Into<u32>) -> impl Into<impl Debug> { x }
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| ^^^^^^^^^^^^^^^^^^^^^ - return type was inferred to be `impl Into<u32>` here
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| |
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| the trait `From<impl Into<u32>>` is not implemented for `impl Debug`
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= help: the trait `Into<U>` is implemented for `T`
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= note: required for `impl Into<u32>` to implement `Into<impl Debug>`
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error: aborting due to 7 previous errors
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Some errors have detailed explanations: E0277, E0562, E0666.
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For more information about an error, try `rustc --explain E0277`.
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