error[E0506]: cannot assign to `vec[_]` because it is borrowed
  --> $DIR/borrowck-vec-pattern-nesting.rs:9:13
   |
LL |         [box ref _a, _, _] => {
   |              ------ `vec[_]` is borrowed here
LL |
LL |             vec[0] = Box::new(4);
   |             ^^^^^^ `vec[_]` is assigned to here but it was already borrowed
LL |
LL |             _a.use_ref();
   |             -- borrow later used here

error[E0506]: cannot assign to `vec[_]` because it is borrowed
  --> $DIR/borrowck-vec-pattern-nesting.rs:23:13
   |
LL |         &mut [ref _b @ ..] => {
   |               ------ `vec[_]` is borrowed here
LL |
LL |             vec[0] = Box::new(4);
   |             ^^^^^^ `vec[_]` is assigned to here but it was already borrowed
LL |
LL |             _b.use_ref();
   |             -- borrow later used here

error[E0508]: cannot move out of type `[Box<isize>]`, a non-copy slice
  --> $DIR/borrowck-vec-pattern-nesting.rs:34:11
   |
LL |     match vec {
   |           ^^^ cannot move out of here
...
LL |         &mut [_a,
   |               --
   |               |
   |               data moved here
   |               move occurs because `_a` has type `Box<isize>`, which does not implement the `Copy` trait
   |
help: consider removing the mutable borrow
   |
LL -         &mut [_a,
LL +         [_a,
   |

error[E0508]: cannot move out of type `[Box<isize>]`, a non-copy slice
  --> $DIR/borrowck-vec-pattern-nesting.rs:46:13
   |
LL |     let a = vec[0];
   |             ^^^^^^
   |             |
   |             cannot move out of here
   |             move occurs because `vec[_]` has type `Box<isize>`, which does not implement the `Copy` trait
   |
help: consider borrowing here
   |
LL |     let a = &vec[0];
   |             +
help: consider cloning the value if the performance cost is acceptable
   |
LL |     let a = vec[0].clone();
   |                   ++++++++

error[E0508]: cannot move out of type `[Box<isize>]`, a non-copy slice
  --> $DIR/borrowck-vec-pattern-nesting.rs:56:11
   |
LL |     match vec {
   |           ^^^ cannot move out of here
...
LL |          _b] => {}
   |          --
   |          |
   |          data moved here
   |          move occurs because `_b` has type `Box<isize>`, which does not implement the `Copy` trait
   |
help: consider removing the mutable borrow
   |
LL -         &mut [
LL +         [
   |

error[E0508]: cannot move out of type `[Box<isize>]`, a non-copy slice
  --> $DIR/borrowck-vec-pattern-nesting.rs:66:13
   |
LL |     let a = vec[0];
   |             ^^^^^^
   |             |
   |             cannot move out of here
   |             move occurs because `vec[_]` has type `Box<isize>`, which does not implement the `Copy` trait
   |
help: consider borrowing here
   |
LL |     let a = &vec[0];
   |             +
help: consider cloning the value if the performance cost is acceptable
   |
LL |     let a = vec[0].clone();
   |                   ++++++++

error[E0508]: cannot move out of type `[Box<isize>]`, a non-copy slice
  --> $DIR/borrowck-vec-pattern-nesting.rs:76:11
   |
LL |     match vec {
   |           ^^^ cannot move out of here
...
LL |         &mut [_a, _b, _c] => {}
   |               --  --  -- ...and here
   |               |   |
   |               |   ...and here
   |               data moved here
   |
   = note: move occurs because these variables have types that don't implement the `Copy` trait
help: consider removing the mutable borrow
   |
LL -         &mut [_a, _b, _c] => {}
LL +         [_a, _b, _c] => {}
   |

error[E0508]: cannot move out of type `[Box<isize>]`, a non-copy slice
  --> $DIR/borrowck-vec-pattern-nesting.rs:87:13
   |
LL |     let a = vec[0];
   |             ^^^^^^
   |             |
   |             cannot move out of here
   |             move occurs because `vec[_]` has type `Box<isize>`, which does not implement the `Copy` trait
   |
help: consider borrowing here
   |
LL |     let a = &vec[0];
   |             +
help: consider cloning the value if the performance cost is acceptable
   |
LL |     let a = vec[0].clone();
   |                   ++++++++

error: aborting due to 8 previous errors

Some errors have detailed explanations: E0506, E0508.
For more information about an error, try `rustc --explain E0506`.