error[E0658]: use of unstable library feature 'ipu_flatten' (see issue #99999) | |
--> $DIR/inference_unstable_forced.rs:21:20 | |
| | |
LL | assert_eq!('x'.ipu_flatten(), 0); //~ ERROR E0658 | |
| ^^^^^^^^^^^ | |
| | |
= help: add #![feature(ipu_flatten)] to the crate attributes to enable | |
error: aborting due to previous error | |
For more information about this error, try `rustc --explain E0658`. |