1error[E0503]: cannot use `x` because it was mutably borrowed
2  --> $DIR/unboxed-closures-borrow-conflict.rs:9:14
3   |
4LL |     let f = || x += 1;
5   |             -- - borrow occurs due to use of `x` in closure
6   |             |
7   |             borrow of `x` occurs here
8LL |     let _y = x;
9   |              ^ use of borrowed `x`
10LL |     f;
11   |     - borrow later used here
12
13error: aborting due to previous error
14
15For more information about this error, try `rustc --explain E0503`.
16