warning: this suppresses the borrow checker in an unsafe, unsound, and unstable way that produces undefined behaviour. this is not suitable for any purpose beyond educational experimentation.
 --> $DIR/in_fn.rs:4:5
  |
4 |     #![you_can::turn_off_the_borrow_checker]
  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

warning: the borrow checker is suppressed for these references.
  --> $DIR/in_fn.rs:9:17
   |
9  |     let mut_1 = &mut owned[0];
   |                 ^^^^^^^^^^^^^
10 |     let mut_2 = &mut owned[1];
   |                 ^^^^^^^^^^^^^

warning: 2 warnings emitted