error[E0554]: `#![feature]` may not be used on the stable release channel
--> doc/insref/src/export.rs:1:1
|
1 | #![feature(proc_macro_hygiene)]
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
For more information about this error, try `rustc --explain E0554`.
error: could not document `insref`
Not sure if you were aware?
Cheers.