1error[E0277]: the trait bound `Dst: zerocopy::Immutable` is not satisfied 2 --> tests/ui-nightly/transmute-ref-dst-not-nocell.rs:23:33 3 | 423 | const DST_NOT_IMMUTABLE: &Dst = transmute_ref!(&AU16(0)); 5 | ^^^^^^^^^^^^^^^^^^^^^^^^ 6 | | 7 | the trait `zerocopy::Immutable` is not implemented for `Dst` 8 | required by a bound introduced by this call 9 | 10 = note: Consider adding `#[derive(Immutable)]` to `Dst` 11 = help: the following other types implement trait `zerocopy::Immutable`: 12 &T 13 &mut T 14 () 15 *const T 16 *mut T 17 AU16 18 Box<T> 19 F32<O> 20 and $N others 21note: required by a bound in `AssertDstIsImmutable` 22 --> tests/ui-nightly/transmute-ref-dst-not-nocell.rs:23:33 23 | 2423 | const DST_NOT_IMMUTABLE: &Dst = transmute_ref!(&AU16(0)); 25 | ^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `AssertDstIsImmutable` 26 = note: this error originates in the macro `transmute_ref` (in Nightly builds, run with -Z macro-backtrace for more info) 27