error[E0389]: cannot borrow data mutably in a `&` reference
  --> $DIR/issue-42344.rs:14:5
   |
LL |     TAB[0].iter_mut(); //~ ERROR cannot borrow data mutably in a `&` reference [E0389]
   |     ^^^^^^ assignment into an immutable reference

error: aborting due to previous error

For more information about this error, try `rustc --explain E0389`.