| error[E0277]: the trait bound `&[i8]: From<&[u8]>` is not satisfied | 
 |   --> $DIR/issue-71394-no-from-impl.rs:8:25 | 
 |    | | 
 | LL |     let _: &[i8] = data.into(); | 
 |    |                         ^^^^ the trait `From<&[u8]>` is not implemented for `&[i8]` | 
 |    | | 
 |    = help: the following other types implement trait `From<T>`: | 
 |              `[T; 10]` implements `From<(T, T, T, T, T, T, T, T, T, T)>` | 
 |              `[T; 11]` implements `From<(T, T, T, T, T, T, T, T, T, T, T)>` | 
 |              `[T; 12]` implements `From<(T, T, T, T, T, T, T, T, T, T, T, T)>` | 
 |              `[T; 1]` implements `From<(T,)>` | 
 |              `[T; 2]` implements `From<(T, T)>` | 
 |              `[T; 3]` implements `From<(T, T, T)>` | 
 |              `[T; 4]` implements `From<(T, T, T, T)>` | 
 |              `[T; 5]` implements `From<(T, T, T, T, T)>` | 
 |            and 6 others | 
 |    = note: required for `&[u8]` to implement `Into<&[i8]>` | 
 |  | 
 | error: aborting due to 1 previous error | 
 |  | 
 | For more information about this error, try `rustc --explain E0277`. |