LL | move || takes_fn_mut(|| f_used_once())
| ^^^^^^^^^^^^^^^^ help: replace the closure with the function itself: `&mut f_used_once`
-error: aborting due to 22 previous errors
+error: redundant closure
+ --> $DIR/eta.rs:329:19
+ |
+LL | array_opt.map(|a| a.as_slice());
+ | ^^^^^^^^^^^^^^^^ help: replace the closure with the method itself: `<[u8; 3]>::as_slice`
+
+error: redundant closure
+ --> $DIR/eta.rs:332:19
+ |
+LL | slice_opt.map(|s| s.len());
+ | ^^^^^^^^^^^ help: replace the closure with the method itself: `<[u8]>::len`
+
+error: redundant closure
+ --> $DIR/eta.rs:335:17
+ |
+LL | ptr_opt.map(|p| p.is_null());
+ | ^^^^^^^^^^^^^^^ help: replace the closure with the method itself: `<*const usize>::is_null`
+
+error: redundant closure
+ --> $DIR/eta.rs:339:17
+ |
+LL | dyn_opt.map(|d| d.method_on_dyn());
+ | ^^^^^^^^^^^^^^^^^^^^^ help: replace the closure with the method itself: `<dyn TestTrait>::method_on_dyn`
+
+error: aborting due to 26 previous errors