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https://github.com/rust-lang/rust
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72 lines
2.9 KiB
Plaintext
72 lines
2.9 KiB
Plaintext
error[E0658]: cannot borrow here, since the borrowed element may contain interior mutability
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--> $DIR/const-promoted-opaque.rs:29:25
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LL | let _: &'static _ = &FOO;
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| ^^^^
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= note: see issue #80384 <https://github.com/rust-lang/rust/issues/80384> for more information
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= help: add `#![feature(const_refs_to_cell)]` 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= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date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[E0493]: destructor of `helper::Foo` cannot be evaluated at compile-time
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--> $DIR/const-promoted-opaque.rs:29:26
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LL | let _: &'static _ = &FOO;
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| ^^^ the destructor for this type cannot be evaluated in constants
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...
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LL | };
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| - value is dropped here
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error[E0492]: constants cannot refer to interior mutable data
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--> $DIR/const-promoted-opaque.rs:34:19
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LL | const BAZ: &Foo = &FOO;
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| ^^^^ this borrow of an interior mutable value may end up in the final value
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error[E0716]: temporary value dropped while borrowed
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--> $DIR/const-promoted-opaque.rs:38:26
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LL | let _: &'static _ = &FOO;
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| ---------- ^^^ creates a temporary value which is freed while still in use
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| |
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| type annotation requires that borrow lasts for `'static`
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LL |
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LL | }
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| - temporary value is freed at the end of this statement
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error[E0391]: cycle detected when computing type of opaque `helper::Foo::{opaque#0}`
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--> $DIR/const-promoted-opaque.rs:14:20
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LL | pub type Foo = impl Sized;
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| ^^^^^^^^^^
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note: ...which requires borrow-checking `helper::FOO`...
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--> $DIR/const-promoted-opaque.rs:18:5
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LL | pub const FOO: Foo = String::new();
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| ^^^^^^^^^^^^^^^^^^
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note: ...which requires promoting constants in MIR for `helper::FOO`...
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--> $DIR/const-promoted-opaque.rs:18:5
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LL | pub const FOO: Foo = String::new();
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| ^^^^^^^^^^^^^^^^^^
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note: ...which requires const checking `helper::FOO`...
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--> $DIR/const-promoted-opaque.rs:18:5
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LL | pub const FOO: Foo = String::new();
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| ^^^^^^^^^^^^^^^^^^
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= note: ...which requires computing whether `helper::Foo` is freeze...
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= note: ...which requires evaluating trait selection obligation `helper::Foo: core::marker::Freeze`...
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= note: ...which again requires computing type of opaque `helper::Foo::{opaque#0}`, completing the cycle
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note: cycle used when computing type of `helper::Foo::{opaque#0}`
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--> $DIR/const-promoted-opaque.rs:14:20
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LL | pub type Foo = impl Sized;
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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: aborting due to 5 previous errors
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Some errors have detailed explanations: E0391, E0492, E0493, E0658, E0716.
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For more information about an error, try `rustc --explain E0391`.
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