43 lines
2.0 KiB
Plaintext
43 lines
2.0 KiB
Plaintext
warning: mutable reference of mutable static is discouraged
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--> $DIR/issue-17718-const-bad-values.rs:5:41
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LL | const C2: &'static mut usize = unsafe { &mut S };
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| ^^^^^^ mutable reference of mutable static
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= note: for more information, see issue #114447 <https://github.com/rust-lang/rust/issues/114447>
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= note: reference of mutable static is a hard error from 2024 edition
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= note: mutable statics can be written to by multiple threads: aliasing violations or data races will cause undefined behavior
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= note: `#[warn(static_mut_ref)]` on by default
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help: mutable references are dangerous since if there's any other pointer or reference used for that static while the reference lives, that's UB; use `addr_of_mut!` instead to create a raw pointer
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LL | const C2: &'static mut usize = unsafe { addr_of_mut!(S) };
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| ~~~~~~~~~~~~~~~
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error[E0764]: mutable references are not allowed in the final value of constants
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--> $DIR/issue-17718-const-bad-values.rs:1:34
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LL | const C1: &'static mut [usize] = &mut [];
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| ^^^^^^^
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error[E0013]: constants cannot refer to statics
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--> $DIR/issue-17718-const-bad-values.rs:5:46
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LL | const C2: &'static mut usize = unsafe { &mut S };
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| ^
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= help: consider extracting the value of the `static` to a `const`, and referring to that
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error[E0013]: constants cannot refer to statics
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--> $DIR/issue-17718-const-bad-values.rs:5:46
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LL | const C2: &'static mut usize = unsafe { &mut S };
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| ^
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= help: consider extracting the value of the `static` to a `const`, and referring to that
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= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
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error: aborting due to 3 previous errors; 1 warning emitted
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Some errors have detailed explanations: E0013, E0764.
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For more information about an error, try `rustc --explain E0013`.
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