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