error[E0499]: cannot borrow `*bar` as mutable more than once at a time
  --> $DIR/issue-51117.rs:10:13
   |
LL |         Some(baz) => {
   |              --- first mutable borrow occurs here
LL |             bar.take();
   |             ^^^ second mutable borrow occurs here
LL |             drop(baz);
   |                  --- first borrow later used here

error: aborting due to previous error

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