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45 lines
2.4 KiB
Plaintext
45 lines
2.4 KiB
Plaintext
error[E0308]: mismatched types
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--> tests/ui-nightly/transmute-mut-src-not-a-reference.rs:17:53
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17 | const SRC_NOT_A_REFERENCE: &mut u8 = transmute_mut!(0usize);
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| ---------------^^^^^^-
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| | |
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| | expected `&mut _`, found `usize`
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| expected due to this
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= note: expected mutable reference `&mut _`
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found type `usize`
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help: consider mutably borrowing here
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17 | const SRC_NOT_A_REFERENCE: &mut u8 = transmute_mut!(&mut 0usize);
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| ++++
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warning: this function depends on never type fallback being `()`
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--> tests/ui-nightly/transmute-mut-src-not-a-reference.rs:17:1
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17 | const SRC_NOT_A_REFERENCE: &mut u8 = transmute_mut!(0usize);
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
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= note: for more information, see issue #123748 <https://github.com/rust-lang/rust/issues/123748>
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= help: specify the types explicitly
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note: in edition 2024, the requirement `!: FromBytes` will fail
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--> tests/ui-nightly/transmute-mut-src-not-a-reference.rs:17:38
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17 | const SRC_NOT_A_REFERENCE: &mut u8 = transmute_mut!(0usize);
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| ^^^^^^^^^^^^^^^^^^^^^^
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= note: `#[warn(dependency_on_unit_never_type_fallback)]` on by default
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= note: this warning originates in the macro `transmute_mut` (in Nightly builds, run with -Z macro-backtrace for more info)
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warning: never type fallback affects this call to an `unsafe` function
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--> tests/ui-nightly/transmute-mut-src-not-a-reference.rs:17:38
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17 | const SRC_NOT_A_REFERENCE: &mut u8 = transmute_mut!(0usize);
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| ^^^^^^^^^^^^^^^^^^^^^^
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= warning: this will change its meaning in a future release!
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= note: for more information, see issue #123748 <https://github.com/rust-lang/rust/issues/123748>
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= help: specify the type explicitly
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= note: `#[warn(never_type_fallback_flowing_into_unsafe)]` on by default
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= note: this warning originates in the macro `$crate::assert_size_eq` which comes from the expansion of the macro `transmute_mut` (in Nightly builds, run with -Z macro-backtrace for more info)
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