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