error[E0277]: the trait bound `Dst: FromBytes` is not satisfied --> tests/ui-stable/transmute-mut-dst-not-frombytes.rs:24:38 | 24 | const DST_NOT_FROM_BYTES: &mut Dst = transmute_mut!(&mut Src); | ^^^^^^^^^^^^^^^^^^^^^^^^ | | | the trait `FromBytes` is not implemented for `Dst` | required by a bound introduced by this call | = help: the following other types implement trait `FromBytes`: isize i8 i16 i32 i64 i128 usize u8 and $N others note: required by a bound in `AssertDstIsFromBytes` --> tests/ui-stable/transmute-mut-dst-not-frombytes.rs:24:38 | 24 | const DST_NOT_FROM_BYTES: &mut Dst = transmute_mut!(&mut Src); | ^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `AssertDstIsFromBytes` = note: this error originates in the macro `transmute_mut` (in Nightly builds, run with -Z macro-backtrace for more info)