error[E0594]: cannot assign to `x`, as it is a captured variable in a `Fn` closure
--> $DIR/borrow-immutable-upvar-mutation-impl-trait.rs:11:9
|
-LL | fn bar() -> impl Fn() -> usize {
- | --- ------------------ change this to return `FnMut` instead of `Fn`
-LL | let mut x = 0;
-LL | / move || {
-LL | | x += 1;
- | | ^^^^^^ cannot assign
-LL | | x
-LL | | }
- | |_____- in this closure
+LL | fn bar() -> impl Fn() -> usize {
+ | --- ------------------ change this to return `FnMut` instead of `Fn`
+LL | let mut x = 0;
+LL | move || {
+ | ------- in this closure
+LL | x += 1;
+ | ^^^^^^ cannot assign
error: aborting due to previous error