rust/tests/ui/closures/2229_closure_analysis/diagnostics/closure-origin-array-diagnostics.stderr

error[E0525]: expected a closure that implements the `Fn` trait, but this closure only implements `FnOnce`
  --> $DIR/closure-origin-array-diagnostics.rs:9:13
   |
LL |     let c = || {
   |             ^^ this closure implements `FnOnce`, not `Fn`
LL |         let [_, _s] = s;
   |                       - closure is `FnOnce` because it moves the variable `s` out of its environment
LL |     };
LL |     expect_fn(c);
   |     --------- - the requirement to implement `Fn` derives from here
   |     |
   |     required by a bound introduced by this call
   |
note: required by a bound in `expect_fn`
  --> $DIR/closure-origin-array-diagnostics.rs:5:17
   |
LL | fn expect_fn<F: Fn()>(_f: F) {}
   |                 ^^^^ required by this bound in `expect_fn`

error: aborting due to previous error

For more information about this error, try `rustc --explain E0525`.