mirror of https://github.com/rust-lang/rust
59 lines
2.3 KiB
Plaintext
59 lines
2.3 KiB
Plaintext
error[E0792]: non-defining opaque type use in defining scope
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--> $DIR/issue-53092-2.rs:6:18
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LL | const CONST_BUG: Bug<u8, ()> = unsafe { std::mem::transmute(|_: u8| ()) };
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| ^^^^^^^^^^^ argument `u8` is not a generic parameter
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note: for this opaque type
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--> $DIR/issue-53092-2.rs:4:18
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LL | type Bug<T, U> = impl Fn(T) -> U + Copy;
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| ^^^^^^^^^^^^^^^^^^^^^^
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error[E0391]: cycle detected when computing type of `Bug::{opaque#0}`
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--> $DIR/issue-53092-2.rs:4:18
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LL | type Bug<T, U> = impl Fn(T) -> U + Copy;
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| ^^^^^^^^^^^^^^^^^^^^^^
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note: ...which requires computing type of opaque `Bug::{opaque#0}`...
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--> $DIR/issue-53092-2.rs:4:18
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LL | type Bug<T, U> = impl Fn(T) -> U + Copy;
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| ^^^^^^^^^^^^^^^^^^^^^^
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note: ...which requires type-checking `CONST_BUG`...
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--> $DIR/issue-53092-2.rs:6:1
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LL | const CONST_BUG: Bug<u8, ()> = unsafe { std::mem::transmute(|_: u8| ()) };
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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= note: ...which requires computing layout of `Bug<u8, ()>`...
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= note: ...which requires normalizing `Bug<u8, ()>`...
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= note: ...which again requires computing type of `Bug::{opaque#0}`, completing the cycle
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note: cycle used when checking that `Bug::{opaque#0}` is well-formed
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--> $DIR/issue-53092-2.rs:4:18
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LL | type Bug<T, U> = impl Fn(T) -> U + Copy;
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| ^^^^^^^^^^^^^^^^^^^^^^
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= note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information
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error[E0277]: the trait bound `U: From<T>` is not satisfied
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--> $DIR/issue-53092-2.rs:10:5
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LL | |x| x.into()
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| ^^^^^^^^^^^^ the trait `From<T>` is not implemented for `U`
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note: required by a bound in `make_bug`
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--> $DIR/issue-53092-2.rs:9:19
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LL | fn make_bug<T, U: From<T>>() -> Bug<T, U> {
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| ^^^^^^^ required by this bound in `make_bug`
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help: consider restricting type parameter `U`
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LL | type Bug<T, U: std::convert::From<T>> = impl Fn(T) -> U + Copy;
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| +++++++++++++++++++++++
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error: aborting due to 3 previous errors
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Some errors have detailed explanations: E0277, E0391, E0792.
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For more information about an error, try `rustc --explain E0277`.
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