error[E0502]: cannot borrow `vector` as mutable because it is also borrowed as immutable
  --> $DIR/borrowck-for-loop-head-linkage.rs:7:9
   |
LL |     for &x in &vector {
   |                ------
   |                |    |
   |                |    immutable borrow ends here
   |                immutable borrow occurs here
LL |         let cap = vector.capacity();
LL |         vector.extend(repeat(0));
   |         ^^^^^^ mutable borrow occurs here

error[E0502]: cannot borrow `vector` as mutable because it is also borrowed as immutable
  --> $DIR/borrowck-for-loop-head-linkage.rs:8:9
   |
LL |     for &x in &vector {
   |                ------
   |                |    |
   |                |    immutable borrow ends here
   |                immutable borrow occurs here
...
LL |         vector[1] = 5;
   |         ^^^^^^ mutable borrow occurs here

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0502`.