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|
error[E0308]: mismatched types
--> tests/ui-nightly/transmute-mut-src-dst-not-references.rs:17:59
|
17 | const SRC_DST_NOT_REFERENCES: &mut usize = transmute_mut!(0usize);
| ---------------^^^^^^-
| | |
| | expected `&mut _`, found `usize`
| expected due to this
|
= note: expected mutable reference `&mut _`
found type `usize`
help: consider mutably borrowing here
|
17 | const SRC_DST_NOT_REFERENCES: &mut usize = transmute_mut!(&mut 0usize);
| ++++
warning: this function depends on never type fallback being `()`
--> tests/ui-nightly/transmute-mut-src-dst-not-references.rs:17:1
|
17 | const SRC_DST_NOT_REFERENCES: &mut usize = transmute_mut!(0usize);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
= note: for more information, see issue #123748 <https://github.com/rust-lang/rust/issues/123748>
= help: specify the types explicitly
note: in edition 2024, the requirement `!: FromBytes` will fail
--> tests/ui-nightly/transmute-mut-src-dst-not-references.rs:17:44
|
17 | const SRC_DST_NOT_REFERENCES: &mut usize = transmute_mut!(0usize);
| ^^^^^^^^^^^^^^^^^^^^^^
= note: `#[warn(dependency_on_unit_never_type_fallback)]` on by default
= note: this warning originates in the macro `transmute_mut` (in Nightly builds, run with -Z macro-backtrace for more info)
help: use `()` annotations to avoid fallback changes
--> src/macros.rs
|
| let e: &mut () = $e;
| ~~
warning: never type fallback affects this call to an `unsafe` function
--> tests/ui-nightly/transmute-mut-src-dst-not-references.rs:17:44
|
17 | const SRC_DST_NOT_REFERENCES: &mut usize = transmute_mut!(0usize);
| ^^^^^^^^^^^^^^^^^^^^^^
|
= warning: this will change its meaning in a future release!
= note: for more information, see issue #123748 <https://github.com/rust-lang/rust/issues/123748>
= help: specify the type explicitly
= note: `#[warn(never_type_fallback_flowing_into_unsafe)]` on by default
= note: this warning originates in the macro `$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)
|
