src/test/ui/dropck/drop-on-non-struct.stderr

   1 error[E0120]: the Drop trait may only be implemented on structures
   2   --> $DIR/drop-on-non-struct.rs:1:19
   3    |
   4 LL | impl<'a> Drop for &'a mut isize {
   5    |                   ^^^^^^^^^^^^^ implementing Drop requires a struct
   6
   7 error[E0117]: only traits defined in the current crate can be implemented for arbitrary types
   8   --> $DIR/drop-on-non-struct.rs:1:1
   9    |
  10 LL | impl<'a> Drop for &'a mut isize {
  11    | ^^^^^^^^^^^^^^^^^^-------------
  12    | |                 |
  13    | |                 `isize` is not defined in the current crate
  14    | impl doesn't use only types from inside the current crate
  15    |
  16    = note: define and implement a trait or new type instead
  17
  18 error: aborting due to 2 previous errors
  19
  20 Some errors have detailed explanations: E0117, E0120.
  21 For more information about an error, try `rustc --explain E0117`.