error[E0277]: the trait bound `Dst: AsBytes` is not satisfied --> tests/ui-nightly/transmute-mut-dst-not-asbytes.rs:24:36 | 24 | const DST_NOT_AS_BYTES: &mut Dst = transmute_mut!(&mut Src); | ^^^^^^^^^^^^^^^^^^^^^^^^ | | | the trait `AsBytes` is not implemented for `Dst` | required by a bound introduced by this call | = help: the following other types implement trait `AsBytes`: bool char isize i8 i16 i32 i64 i128 and $N others note: required by a bound in `AssertDstIsAsBytes` --> tests/ui-nightly/transmute-mut-dst-not-asbytes.rs:24:36 | 24 | const DST_NOT_AS_BYTES: &mut Dst = transmute_mut!(&mut Src); | ^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `AssertDstIsAsBytes` = note: this error originates in the macro `transmute_mut` (in Nightly builds, run with -Z macro-backtrace for more info)