error[E0277]: the trait bound `&[i8]: From<&[u8]>` is not satisfied
  --> $DIR/issue-71394-no-from-impl.rs:3:20
   |
LL |     let _: &[i8] = data.into();
   |                    ^^^^ ---- required by a bound introduced by this call
   |                    |
   |                    the trait `From<&[u8]>` is not implemented for `&[i8]`
   |
   = help: the following other types implement trait `From<T>`:
             <[T; LANES] as From<Simd<T, LANES>>>
             <[bool; LANES] as From<Mask<T, LANES>>>
   = note: required for `&[u8]` to implement `Into<&[i8]>`

error: aborting due to previous error

For more information about this error, try `rustc --explain E0277`.