src/test/ui/rfc-2005-default-binding-mode/borrowck-issue-49631.nll.stderr

   1 error[E0502]: cannot borrow `foo` as mutable because it is also borrowed as immutable
   2   --> $DIR/borrowck-issue-49631.rs:20:9
   3    |
   4 LL |     while let Some(Ok(string)) = foo.get() {
   5    |                                  --- immutable borrow occurs here
   6 LL |         foo.mutate();
   7    |         ^^^^^^^^^^^^ mutable borrow occurs here
   8 LL |         //~^ ERROR cannot borrow `foo` as mutable
   9 LL |         println!("foo={:?}", *string);
  10    |                              ------- immutable borrow later used here
  11
  12 error: aborting due to previous error
  13
  14 For more information about this error, try `rustc --explain E0502`.