src/test/ui/borrowck/borrowck-autoref-3261.stderr

   1 error[E0499]: cannot borrow `x` as mutable more than once at a time
   2   --> $DIR/borrowck-autoref-3261.rs:15:9
   3    |
   4 LL |     (&mut x).with(
   5    |     -------- ---- first borrow later used by call
   6    |     |
   7    |     first mutable borrow occurs here
   8 LL |         |opt| {
   9    |         ^^^^^ second mutable borrow occurs here
  10 ...
  11 LL |                     x = X(Either::Left((0, 0)));
  12    |                     - second borrow occurs due to use of `x` in closure
  13
  14 error: aborting due to previous error
  15
  16 For more information about this error, try `rustc --explain E0499`.