error[E0308]: mismatched types --> tests/ui-nightly/transmute-ref-src-dst-not-references.rs:17:54 | 17 | const SRC_DST_NOT_REFERENCES: usize = transmute_ref!(0usize); | ---------------^^^^^^- | | | | | expected `&_`, found `usize` | expected due to this | = note: expected reference `&_` found type `usize` help: consider borrowing here | 17 | const SRC_DST_NOT_REFERENCES: usize = transmute_ref!(&0usize); | + error[E0308]: mismatched types --> tests/ui-nightly/transmute-ref-src-dst-not-references.rs:17:39 | 17 | const SRC_DST_NOT_REFERENCES: usize = transmute_ref!(0usize); | ^^^^^^^^^^^^^^^^^^^^^^ expected `usize`, found `&_` | = note: expected type `usize` found reference `&_` = note: this error originates in the macro `transmute_ref` (in Nightly builds, run with -Z macro-backtrace for more info) error[E0308]: mismatched types --> tests/ui-nightly/transmute-ref-src-dst-not-references.rs:17:39 | 17 | const SRC_DST_NOT_REFERENCES: usize = transmute_ref!(0usize); | ^^^^^^^^^^^^^^^^^^^^^^ expected `usize`, found `&_` | = note: expected type `usize` found reference `&_` = note: this error originates in the macro `transmute_ref` (in Nightly builds, run with -Z macro-backtrace for more info) error[E0308]: mismatched types --> tests/ui-nightly/transmute-ref-src-dst-not-references.rs:17:39 | 17 | const SRC_DST_NOT_REFERENCES: usize = transmute_ref!(0usize); | ^^^^^^^^^^^^^^^^^^^^^^ expected `usize`, found `&_` | = note: expected type `usize` found reference `&_` = note: this error originates in the macro `transmute_ref` (in Nightly builds, run with -Z macro-backtrace for more info) error[E0308]: mismatched types --> tests/ui-nightly/transmute-ref-src-dst-not-references.rs:17:39 | 17 | const SRC_DST_NOT_REFERENCES: usize = transmute_ref!(0usize); | ^^^^^^^^^^^^^^^^^^^^^^ expected `usize`, found `&_` | = note: expected type `usize` found reference `&_` = note: this error originates in the macro `transmute_ref` (in Nightly builds, run with -Z macro-backtrace for more info) error[E0308]: mismatched types --> tests/ui-nightly/transmute-ref-src-dst-not-references.rs:17:39 | 17 | const SRC_DST_NOT_REFERENCES: usize = transmute_ref!(0usize); | ^^^^^^^^^^^^^^^^^^^^^^ | | | expected `usize`, found `&_` | arguments to this function are incorrect | = note: expected type `usize` found reference `&_` help: the return type of this call is `&_` due to the type of the argument passed --> tests/ui-nightly/transmute-ref-src-dst-not-references.rs:17:39 | 17 | const SRC_DST_NOT_REFERENCES: usize = transmute_ref!(0usize); | ^^^^^^^^^^^^^^^^^^^^^^ this argument influences the return type of `$crate` note: function defined here --> src/util/macro_util.rs | | pub const fn must_use(t: T) -> T { | ^^^^^^^^ = note: this error originates in the macro `transmute_ref` (in Nightly builds, run with -Z macro-backtrace for more info) warning: this function depends on never type fallback being `()` --> tests/ui-nightly/transmute-ref-src-dst-not-references.rs:17:1 | 17 | const SRC_DST_NOT_REFERENCES: usize = transmute_ref!(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 = help: specify the types explicitly note: in edition 2024, the requirement `!: IntoBytes` will fail --> tests/ui-nightly/transmute-ref-src-dst-not-references.rs:17:39 | 17 | const SRC_DST_NOT_REFERENCES: usize = transmute_ref!(0usize); | ^^^^^^^^^^^^^^^^^^^^^^ = note: `#[warn(dependency_on_unit_never_type_fallback)]` on by default = note: this warning originates in the macro `transmute_ref` (in Nightly builds, run with -Z macro-backtrace for more info) help: use `()` annotations to avoid fallback changes --> src/macros.rs | | let e: &() = $e; | ~~ warning: never type fallback affects this call to an `unsafe` function --> tests/ui-nightly/transmute-ref-src-dst-not-references.rs:17:39 | 17 | const SRC_DST_NOT_REFERENCES: usize = transmute_ref!(0usize); | ^^^^^^^^^^^^^^^^^^^^^^ | = warning: this will change its meaning in a future release! = note: for more information, see issue #123748 = help: specify the type explicitly = note: `#[warn(never_type_fallback_flowing_into_unsafe)]` on by default = note: this warning originates in the macro `$crate::assert_size_eq` which comes from the expansion of the macro `transmute_ref` (in Nightly builds, run with -Z macro-backtrace for more info) warning: never type fallback affects this call to an `unsafe` function --> tests/ui-nightly/transmute-ref-src-dst-not-references.rs:17:39 | 17 | const SRC_DST_NOT_REFERENCES: usize = transmute_ref!(0usize); | ^^^^^^^^^^^^^^^^^^^^^^ | = warning: this will change its meaning in a future release! = note: for more information, see issue #123748 = help: specify the type explicitly = note: this warning originates in the macro `transmute_ref` (in Nightly builds, run with -Z macro-backtrace for more info)