error[E0499]: cannot borrow `*arg` as mutable more than once at a time
  --> $DIR/mut-borrow-in-loop.rs:20:25
   |
LL |             (self.func)(arg) //~ ERROR cannot borrow
   |                         ^^^ mutable borrow starts here in previous iteration of loop
   |
note: borrowed value must be valid for the lifetime 'a as defined on the impl at 17:6...
  --> $DIR/mut-borrow-in-loop.rs:17:6
   |
LL | impl<'a, T : 'a> FuncWrapper<'a, T> {
   |      ^^

error[E0499]: cannot borrow `*arg` as mutable more than once at a time
  --> $DIR/mut-borrow-in-loop.rs:26:25
   |
LL |             (self.func)(arg) //~ ERROR cannot borrow
   |                         ^^^ mutable borrow starts here in previous iteration of loop
   |
note: borrowed value must be valid for the lifetime 'a as defined on the impl at 17:6...
  --> $DIR/mut-borrow-in-loop.rs:17:6
   |
LL | impl<'a, T : 'a> FuncWrapper<'a, T> {
   |      ^^

error[E0499]: cannot borrow `*arg` as mutable more than once at a time
  --> $DIR/mut-borrow-in-loop.rs:33:25
   |
LL |             (self.func)(arg) //~ ERROR cannot borrow
   |                         ^^^ mutable borrow starts here in previous iteration of loop
   |
note: borrowed value must be valid for the lifetime 'a as defined on the impl at 17:6...
  --> $DIR/mut-borrow-in-loop.rs:17:6
   |
LL | impl<'a, T : 'a> FuncWrapper<'a, T> {
   |      ^^

error: aborting due to 3 previous errors

For more information about this error, try `rustc --explain E0499`.