1 warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
4 LL | #![feature(specialization)]
7 = note: `#[warn(incomplete_features)]` on by default
8 = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
9 = help: consider using `min_specialization` instead, which is more stable and complete
11 error[E0520]: `fly` specializes an item from a parent `impl`, but that item is not marked `default`
12 --> $DIR/E0520.rs:17:5
14 LL | / impl<T: Clone> SpaceLlama for T {
15 LL | | fn fly(&self) {}
17 | |_- parent `impl` is here
19 LL | default fn fly(&self) {}
20 | ^^^^^^^^^^^^^^^^^^^^^^^^ cannot specialize default item `fly`
22 = note: to specialize, `fly` in the parent `impl` must be marked `default`
24 error: aborting due to previous error; 1 warning emitted
26 For more information about this error, try `rustc --explain E0520`.