1error[E0525]: expected a closure that implements the `Fn` trait, but this closure only implements `FnOnce` 2 --> $DIR/unboxed-closures-infer-fn-once-move-from-projection.rs:14:13 3 | 4LL | let c = || drop(y.0); 5 | ^^^^^^^^---^ 6 | | | 7 | | closure is `FnOnce` because it moves the variable `y` out of its environment 8 | this closure implements `FnOnce`, not `Fn` 9LL | foo(c); 10 | --- the requirement to implement `Fn` derives from here 11 12error: aborting due to previous error 13 14For more information about this error, try `rustc --explain E0525`. 15