error[E0502]: cannot borrow `v` as mutable because it is also borrowed as immutable
  --> $DIR/two-phase-reservation-sharing-interference-2.rs:19:5
   |
LL |     let shared = &v;
   |                  -- immutable borrow occurs here
LL | 
LL |     v.extend(shared);
   |     ^^------^^^^^^^^
   |     | |
   |     | immutable borrow later used by call
   |     mutable borrow occurs here

error[E0502]: cannot borrow `v` as mutable because it is also borrowed as immutable
  --> $DIR/two-phase-reservation-sharing-interference-2.rs:29:5
   |
LL |     v.extend(&v);
   |     ^^------^--^
   |     | |      |
   |     | |      immutable borrow occurs here
   |     | immutable borrow later used by call
   |     mutable borrow occurs here

warning: cannot borrow `v` as mutable because it is also borrowed as immutable
  --> $DIR/two-phase-reservation-sharing-interference-2.rs:40:5
   |
LL |     let shared = &v;
   |                  -- immutable borrow occurs here
LL | 
LL |     v.push(shared.len());
   |     ^      ------ immutable borrow later used here
   |     |
   |     mutable borrow occurs here
   |
   = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
   = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
   = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>

error: aborting due to 2 previous errors

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