| error[E0658]: use of unstable library feature 'ipu_flatten' |
| --> $DIR/inference_unstable_forced.rs:11:20 |
| | |
| LL | assert_eq!('x'.ipu_flatten(), 0); |
| | ^^^^^^^^^^^ |
| | |
| = note: see issue #99999 <https://github.com/rust-lang/rust/issues/99999> for more information |
| = help: add `#![feature(ipu_flatten)]` to the crate attributes to enable |
| = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date |
| |
| error: aborting due to 1 previous error |
| |
| For more information about this error, try `rustc --explain E0658`. |